Men's Taper vs Fade Haircuts - low ball taper

2024-07-07 19:03:33

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Limits are the basic size’s high (Upper limit) and low (Lower limit) values. For example, if the lower limit of a hole is 25.05 mm and the upper limit of the same hole is 25.15 mm, then a hole that is 25.1 mm in diameter is within limits and is acceptable. The limits are the final result obtained from the tolerance system based on the nominal size and tolerance class.ShaftShaft refers to an external feature of a workpiece, typically cylindrical in shape. However, the term can be used to describe any external feature. For example, a block that has to fit into a keyway or the square shank of a cutting tool can also be referred to as a shaft.HoleHole refers to an internal feature of a workpiece, typically a bore. However, the term can be used to describe any internal feature. For example, a keyway.Fundamental DeviationFundamental Deviation is The position of the tolerance zone in relation to the zero line (Also referred to as basic size or nominal size). The fundamental deviation is measured to the point that is nearest to the zero line. A 1-2 character letter code (e.g. G, js, are used to indicate it. Holes are marked by capital letters, and shafts by small letters. For example, “G” is a fundamental deviation of a hole, and “js” is a fundamental deviation of a shaft.The size of the deviation depends on its letter code and the nominal size.Values are listed in the below table.Check out our below infographic for easier understanding.Upper & lower DeviationsThe algebraic difference between the upper limit and the basic size is called the upper deviation and is denoted by es for shafts and ES for holes. The algebraic difference between the lower limit and the basic size is called the lower deviation and is represented by ei for shafts and EI for holes. The configurations may be confusing and depend if the feature is external or internal and if the deviation is negative, positive, or zero.Deviation SymbolA-GHes=0,ei=ITEI=0, ES=ITJSei=es=IT/2EI=ES=IT/2K-ZToleranceTolerance is the difference between the limits of size. That is the upper limit minus the lower limit.Standard Tolerance Grade: A number between 0 to 18 and designated as “IT” (e.g. IT7). A lower IT means higher accuracy. The value of each IT also depends on the basic size. You can find the values in the below chart.The IS0 system provides 20 standard tolerance grades, of which IT1 to IT18 are considered general use. In addition, there are two complementary grades, IT01 and IT0. The collection of charts provided in ISO 286-2 covers only IT1-IT18.Tolerance Class: The term used for the combination of a fundamental deviation with a standard tolerance grade, e.g. h9, D13, etc.All the above terms are summarized in the below infographics(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

The tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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The tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

For ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

Industry revenue is measured across several distinct product and services lines, including Flour products for human consumption, Millfeed and Rice. Flour products for human consumption is the largest segment of the Flour Milling in Canada.

Get data and insights on what's driving competition in an industry and the challenges industry operators and new entrants may face, with analysis built around Porter's Five Forces framework.

Millers compete primarily on price. Price is directly related to a good’s perceived quality resulting in price being a critical competitive factor.

Technical drawings often include notations such as “50 g6” or “17.5 H11/g8” to specify tolerances. However, determining the final limits can be time-consuming and involve navigating complex charts. Our Online Calculator streamlines this process and provides a detailed final result immediately. Additionally, we offer clear and interactive versions of the traditional charts and in-depth technical explanations of all related terminology.CalculatorChartsLearn

Milling companiesnear me

This industry participates in the following activities: milling grains and vegetables into flour; cleaning, polishing and milling rice; and producing malt from a variety of cereal grains. Industry operators purchase grain inputs such as wheat, corn, barley and rice from wholesalers or directly from growers. They then process them into flour, gluten, starch and malt and sell these products to grocery wholesalers or other food-related industries.

The market size of the Flour Milling industry in Canada has been growing at a CAGR of 11.4 % between 2018 and 2023.

The most commonly used tolerancing system for shafts and holes is detailed in ISO 286-1 & 286-2. The first provides the charts for the fundamental deviations (G, j, etc.) and tolerance grades (7, 8, 9, etc.), out of which the limits of the tolerance classes (H7, g6, etc.) can be calculated. ISO 286-2 is a collection of dozens of charts that tabulate the size limits for all the tolerance grades. The figures listed in ISO 286-2 are calculated based on ISO 286-1 and can also be obtained independently. A thorough understanding of the basic terminology is critical for a solid understanding of the data provided by our calculator and charts.Pay attention that some of the terms have a somewhat different meaning within the tolerancing system (Compared to its general meaning in mechanical engineering!)TerminologyBasic Size (Also may be called nominal size)Nominal size is the dimension by which a feature is identified for convenience. It is also the point from which the limits are derived by application of the necessary deviation and tolerance (See explanation below). For example, a slot whose actual width is 25.15 mm would be known as a 25-mm wide slot.Limits of SizeLimits are the basic size’s high (Upper limit) and low (Lower limit) values. For example, if the lower limit of a hole is 25.05 mm and the upper limit of the same hole is 25.15 mm, then a hole that is 25.1 mm in diameter is within limits and is acceptable. The limits are the final result obtained from the tolerance system based on the nominal size and tolerance class.ShaftShaft refers to an external feature of a workpiece, typically cylindrical in shape. However, the term can be used to describe any external feature. For example, a block that has to fit into a keyway or the square shank of a cutting tool can also be referred to as a shaft.HoleHole refers to an internal feature of a workpiece, typically a bore. However, the term can be used to describe any internal feature. For example, a keyway.Fundamental DeviationFundamental Deviation is The position of the tolerance zone in relation to the zero line (Also referred to as basic size or nominal size). The fundamental deviation is measured to the point that is nearest to the zero line. A 1-2 character letter code (e.g. G, js, are used to indicate it. Holes are marked by capital letters, and shafts by small letters. For example, “G” is a fundamental deviation of a hole, and “js” is a fundamental deviation of a shaft.The size of the deviation depends on its letter code and the nominal size.Values are listed in the below table.Check out our below infographic for easier understanding.Upper & lower DeviationsThe algebraic difference between the upper limit and the basic size is called the upper deviation and is denoted by es for shafts and ES for holes. The algebraic difference between the lower limit and the basic size is called the lower deviation and is represented by ei for shafts and EI for holes. The configurations may be confusing and depend if the feature is external or internal and if the deviation is negative, positive, or zero.Deviation SymbolA-GHes=0,ei=ITEI=0, ES=ITJSei=es=IT/2EI=ES=IT/2K-ZToleranceTolerance is the difference between the limits of size. That is the upper limit minus the lower limit.Standard Tolerance Grade: A number between 0 to 18 and designated as “IT” (e.g. IT7). A lower IT means higher accuracy. The value of each IT also depends on the basic size. You can find the values in the below chart.The IS0 system provides 20 standard tolerance grades, of which IT1 to IT18 are considered general use. In addition, there are two complementary grades, IT01 and IT0. The collection of charts provided in ISO 286-2 covers only IT1-IT18.Tolerance Class: The term used for the combination of a fundamental deviation with a standard tolerance grade, e.g. h9, D13, etc.All the above terms are summarized in the below infographics(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Locating near suppliers can reduce transportation costs for flour millers. Also, it allows operators to negotiate supply contracts.

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Industry revenue has grown at a CAGR of 11.4 % over the past five years, to reach an estimated $4.7bn in 2023.

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The standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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IBISWorld’s analysts and data scientists use the sources above to create forecasts for our proprietary datasets and industry statistics. Depending on the dataset, they may use regression analysis, multivariate analysis, time-series analysis or exponential smoothing techniques to project future data for the industry or driver. Additionally, analysts will leverage their local knowledge of industry operating and regulatory conditions to impart their best judgment on the forecast model.

A 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Pay attention that some of the terms have a somewhat different meaning within the tolerancing system (Compared to its general meaning in mechanical engineering!)TerminologyBasic Size (Also may be called nominal size)Nominal size is the dimension by which a feature is identified for convenience. It is also the point from which the limits are derived by application of the necessary deviation and tolerance (See explanation below). For example, a slot whose actual width is 25.15 mm would be known as a 25-mm wide slot.Limits of SizeLimits are the basic size’s high (Upper limit) and low (Lower limit) values. For example, if the lower limit of a hole is 25.05 mm and the upper limit of the same hole is 25.15 mm, then a hole that is 25.1 mm in diameter is within limits and is acceptable. The limits are the final result obtained from the tolerance system based on the nominal size and tolerance class.ShaftShaft refers to an external feature of a workpiece, typically cylindrical in shape. However, the term can be used to describe any external feature. For example, a block that has to fit into a keyway or the square shank of a cutting tool can also be referred to as a shaft.HoleHole refers to an internal feature of a workpiece, typically a bore. However, the term can be used to describe any internal feature. For example, a keyway.Fundamental DeviationFundamental Deviation is The position of the tolerance zone in relation to the zero line (Also referred to as basic size or nominal size). The fundamental deviation is measured to the point that is nearest to the zero line. A 1-2 character letter code (e.g. G, js, are used to indicate it. Holes are marked by capital letters, and shafts by small letters. For example, “G” is a fundamental deviation of a hole, and “js” is a fundamental deviation of a shaft.The size of the deviation depends on its letter code and the nominal size.Values are listed in the below table.Check out our below infographic for easier understanding.Upper & lower DeviationsThe algebraic difference between the upper limit and the basic size is called the upper deviation and is denoted by es for shafts and ES for holes. The algebraic difference between the lower limit and the basic size is called the lower deviation and is represented by ei for shafts and EI for holes. The configurations may be confusing and depend if the feature is external or internal and if the deviation is negative, positive, or zero.Deviation SymbolA-GHes=0,ei=ITEI=0, ES=ITJSei=es=IT/2EI=ES=IT/2K-ZToleranceTolerance is the difference between the limits of size. That is the upper limit minus the lower limit.Standard Tolerance Grade: A number between 0 to 18 and designated as “IT” (e.g. IT7). A lower IT means higher accuracy. The value of each IT also depends on the basic size. You can find the values in the below chart.The IS0 system provides 20 standard tolerance grades, of which IT1 to IT18 are considered general use. In addition, there are two complementary grades, IT01 and IT0. The collection of charts provided in ISO 286-2 covers only IT1-IT18.Tolerance Class: The term used for the combination of a fundamental deviation with a standard tolerance grade, e.g. h9, D13, etc.All the above terms are summarized in the below infographics(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Engineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Shaft refers to an external feature of a workpiece, typically cylindrical in shape. However, the term can be used to describe any external feature. For example, a block that has to fit into a keyway or the square shank of a cutting tool can also be referred to as a shaft.

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A transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Nominal size is the dimension by which a feature is identified for convenience. It is also the point from which the limits are derived by application of the necessary deviation and tolerance (See explanation below). For example, a slot whose actual width is 25.15 mm would be known as a 25-mm wide slot.Limits of SizeLimits are the basic size’s high (Upper limit) and low (Lower limit) values. For example, if the lower limit of a hole is 25.05 mm and the upper limit of the same hole is 25.15 mm, then a hole that is 25.1 mm in diameter is within limits and is acceptable. The limits are the final result obtained from the tolerance system based on the nominal size and tolerance class.ShaftShaft refers to an external feature of a workpiece, typically cylindrical in shape. However, the term can be used to describe any external feature. For example, a block that has to fit into a keyway or the square shank of a cutting tool can also be referred to as a shaft.HoleHole refers to an internal feature of a workpiece, typically a bore. However, the term can be used to describe any internal feature. For example, a keyway.Fundamental DeviationFundamental Deviation is The position of the tolerance zone in relation to the zero line (Also referred to as basic size or nominal size). The fundamental deviation is measured to the point that is nearest to the zero line. A 1-2 character letter code (e.g. G, js, are used to indicate it. Holes are marked by capital letters, and shafts by small letters. For example, “G” is a fundamental deviation of a hole, and “js” is a fundamental deviation of a shaft.The size of the deviation depends on its letter code and the nominal size.Values are listed in the below table.Check out our below infographic for easier understanding.Upper & lower DeviationsThe algebraic difference between the upper limit and the basic size is called the upper deviation and is denoted by es for shafts and ES for holes. The algebraic difference between the lower limit and the basic size is called the lower deviation and is represented by ei for shafts and EI for holes. The configurations may be confusing and depend if the feature is external or internal and if the deviation is negative, positive, or zero.Deviation SymbolA-GHes=0,ei=ITEI=0, ES=ITJSei=es=IT/2EI=ES=IT/2K-ZToleranceTolerance is the difference between the limits of size. That is the upper limit minus the lower limit.Standard Tolerance Grade: A number between 0 to 18 and designated as “IT” (e.g. IT7). A lower IT means higher accuracy. The value of each IT also depends on the basic size. You can find the values in the below chart.The IS0 system provides 20 standard tolerance grades, of which IT1 to IT18 are considered general use. In addition, there are two complementary grades, IT01 and IT0. The collection of charts provided in ISO 286-2 covers only IT1-IT18.Tolerance Class: The term used for the combination of a fundamental deviation with a standard tolerance grade, e.g. h9, D13, etc.All the above terms are summarized in the below infographics(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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The algebraic difference between the upper limit and the basic size is called the upper deviation and is denoted by es for shafts and ES for holes. The algebraic difference between the lower limit and the basic size is called the lower deviation and is represented by ei for shafts and EI for holes. The configurations may be confusing and depend if the feature is external or internal and if the deviation is negative, positive, or zero.Deviation SymbolA-GHes=0,ei=ITEI=0, ES=ITJSei=es=IT/2EI=ES=IT/2K-ZToleranceTolerance is the difference between the limits of size. That is the upper limit minus the lower limit.Standard Tolerance Grade: A number between 0 to 18 and designated as “IT” (e.g. IT7). A lower IT means higher accuracy. The value of each IT also depends on the basic size. You can find the values in the below chart.The IS0 system provides 20 standard tolerance grades, of which IT1 to IT18 are considered general use. In addition, there are two complementary grades, IT01 and IT0. The collection of charts provided in ISO 286-2 covers only IT1-IT18.Tolerance Class: The term used for the combination of a fundamental deviation with a standard tolerance grade, e.g. h9, D13, etc.All the above terms are summarized in the below infographics(*) Click to enlargeNomenclatureStandard Tolerance GradesThe standard tolerance grades are designated by the letters IT followed by a number, for example, IT7. When the tolerance grade is associated with a fundamental deviation symbol to form a tolerance class, the letters IT are omitted (e.g., h7, JS5)Fundamental DeviationA 1-2 letter code represents the fundamental deviation. Upper case (e.g., G, JS) designates hole deviations, while lower case (e.g., g, js) designates shaft deviations.Tolerance ClassThe tolerance class is designated by the letter(s) representing the fundamental deviation followed by the standard tolerance grade number. For example, a shaft with a deviation of g and a tolerance grade of T11 will be denoted as g11. A hole with a deviation of JS and a tolerance grade of IT7 will be represented as JS7.Tolerance SizeThe tolerance size combines the basic size with the tolerance class, designated by the basic size, followedby the designation of the required tolerance class (without spaces). For example, 32H7 specifies a hole with a nominal size of 32 mm, deviation H, and tolerance grade of IT7.Tolerances ChartsStandard Tolerance Grades (IT) ChartTolerance Dimensions in MicronsTo convert to millimeters, divide by 1000To convert to Thous, divide by 25.4 wdt_IDDiameter Range (mm)(Inches)IT01IT0IT1IT2IT3IT4IT5IT6IT7IT8IT9IT10IT11IT12IT13IT14IT15IT16IT17IT1810 - 30 - 0.120.30.50.81.2234610142540601001402504006001000140023 - 60.12 - 0.240.40.611.52.545812183048751201803004807501200180036 - 100.24 - 0.40.40.611.52.5469152236589015022036058090015002200410 - 180.4 - 0.710.50.81.223581118274370110180270430700110018002700518 - 300.71 - 1.190.611.52.54691321335284130210330520840130021003300630 - 501.19 - 1.970.611.52.54711162539621001602503906201000160025003900750 - 801.97 - 3.150.81.2235813193046741201903004607401200190030004600880 - 1203.15 - 4.7311.52.54610152235548714022035054087014002200350054009120 - 1804.73 - 7.091.223.55812182540631001602504006301000160025004000630010180 - 2507.09 - 9.85234.571014202946721151852904607201150185029004600720011250 - 3159.85 - 12.412.54681216233252811302103205208101300210032005200810012315 - 40012.41 - 15.7535791318253657891402303605708901400230036005700890013400 - 50015.75 - 19.7468101520274063971552504006309701550250040006300970014500 - 63019.7 - 24.84.569111622324470110175280440700110017502800440070001100015630 - 80024.8 - 31.55710131825365080125200320500800125020003200500080001250016800 - 100031.5 - 39.45.58111521284056901402303605609001400230036005600900014000171000 - 125039.4 - 49.26.59131824334766105165260420660105016502600420066001050016500181250 - 160049.2 - 63811152129395578125195310500780125019503100500078001250019500191600 - 200063 - 78.7913182535466592150230370600920150023003700600092001500023000202000 - 250078.7 - 98.4111522304155781101752804407001100175028004400700011001750028000212500 - 315098.4 - 1241318263650689613521033054086013502100330054008600135002100033000Fundamental deviation of holes ChartClick the Tolerance Link (e.g., H ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns for the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., H ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150A ➢1calculators/tolerances/tol?dev=a||A ➢27027028029029030030031032034036038041046052058066074082092010501200135015001650XXXXXXXXXXXXXXXXB ➢2calculators/tolerances/tol?dev=b||B ➢140140150150150160160170180190200220240260280310340380420480540600680760840XXXXXXXXXXXXXXXXC ➢3calculators/tolerances/tol?dev=c||C ➢6070809595110110120130140150170180200210230240260280300330360400440480520580640700780860940105011501300145016001800200022002500CD ➢4calculators/tolerances/tol?dev=cd||CD ➢344656XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXD ➢5calculators/tolerances/tol?dev=d||D ➢203040505065658080100100120120145145145170170170190190210210230230260260290290320320350350390390430430480480520520E ➢6calculators/tolerances/tol?dev=e||E ➢14202532324040505060607272858585100100100110110125125135135145145160160170170195195220220240240260260290290EF ➢7calculators/tolerances/tol?dev=ef||EF ➢101418XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXF ➢8calculators/tolerances/tol?dev=f||F ➢61013161620202525303036364343435050505656626268687676808086869898110110120120130130145145FG ➢9calculators/tolerances/tol?dev=fg||FG ➢468XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXG ➢10calculators/tolerances/tol?dev=g||G ➢2456677991010121214141415151517171818202022222424262628283030323234343838H ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000JS ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000J ➢13calculators/tolerances/tol?dev=j||J ➢46810101212141418182222262626303030363639394343XXXXXXXXXXXXXXXXK ➢14calculators/tolerances/tol?dev=k||K ➢0-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-4-4-4-4-4-4-4-5-50000000000000000M ➢15calculators/tolerances/tol?dev=m||M ➢-2-4-6-7-7-8-8-9-9-11-11-13-13-15-15-15-17-17-17-20-20-21-21-23-23-26-26-30-30-34-34-40-40-48-48-58-58-68-68-76-76N ➢16calculators/tolerances/tol?dev=n||N ➢-4-8-10-12-12-15-15-17-17-20-20-23-23-27-27-27-31-31-31-34-34-37-37-40-40-44-44-50-50-56-56-66-66-78-78-92-92-110-110-135-135P ➢17calculators/tolerances/tol?dev=p||P ➢-6-12-15-18-18-22-22-26-26-32-32-37-37-43-43-43-50-50-50-56-56-62-62-68-68-78-78-88-88-100-100-120-120-140-140-170-170-195-195-240-240R ➢18calculators/tolerances/tol?dev=r||R ➢-10-15-19-23-23-28-28-34-34-41-43-51-54-63-65-68-77-80-84-94-98-108-114-126-132-150-155-175-185-210-220-250-260-300-330-370-400-440-460-550-580S ➢19calculators/tolerances/tol?dev=s||S ➢-14-19-23-28-28-35-35-43-43-53-59-71-79-92-100-108-122-130-140-158-170-190-208-232-252-280-310-340-380-430-470-520-580-640-720-820-920-1000-1100-1250-1400T ➢20calculators/tolerances/tol?dev=t||T ➢000XXX-41-48-54-66-75-91-104-122-134-146-166-180-196-218-240-268-294-330-360-400-450-500-560-620-680-780-840-960-1050-1200-1350-1500-1650-1900-2100U ➢21calculators/tolerances/tol?dev=u||U ➢-18-23-28-33-33-41-48-60-70-87-102-124-144-170-190-210-236-258-284-315-350-390-435-490-540-600-660-740-840-940-1050-1150-1300-1450-1600-1850-2000-2300-2500-2900-3200V ➢22calculators/tolerances/tol?dev=v||V ➢000X-39-47-55-68-81-102-120-146-172-202-228-252-284-310-340-385-425-475-530-595-660-740-820-920-1000-1150-1300-1450-1600-1800-2000-2300-2500-2800-3100-3500-3900X ➢23calculators/tolerances/tol?dev=x||X ➢-20-28-34-40-45-54-64-80-97-122-146-178-210-248-280-310-340-385-425-475-525-590-660-740-820XXXXXXXXXXXXXXXXY ➢24calculators/tolerances/tol?dev=y||Y ➢000XX-63-75-94-114-144-174-214-254-300-340-380-425-470-520-580-650-730-820-920-1000XXXXXXXXXXXXXXXXZ ➢25calculators/tolerances/tol?dev=z||Z ➢-26-35-42-50-60-73-88-112-136-172-210-258-310-365-415-465-520-575-640-710-790-900-1000-1100-1250XXXXXXXXXXXXXXXXZA ➢26calculators/tolerances/tol?dev=za||ZA ➢-32-42-52-64-77-98-118-148-180-226-274-335-400-470-535-600-670-740-820-920-1000-1150-1300-1450-1600XXXXXXXXXXXXXXXXFundamental deviation of shafts ChartClick the Tolerance Link (e.g., g ➢) to get the Full & Accurate charts for a specific deviation in Inch and Metric unitsClick icons to show all columns of the entire diameter range (0-3,150 mm)The deviations of J through Z also depend on the IT Therefore, the values in the below table are only accurate in some cases. To get the correct value in all cases, click the Tolerance Link (e.g., g ➢).Dimentions in Microns. To convert to millimeters, divide by 1000, to Thous, divide by 25.4 Deviationidurl0 - 3 mm3 - 6 mm6 - 1010 - 1414 - 1818 - 2424 - 3030 - 4040 - 5050 - 6565 - 8080 - 100100 - 120120 - 140140 - 160160 - 180180 - 200200 - 225225 - 250250 - 280280 - 315315 - 355355 - 400400 - 450450 - 500500 - 560560 - 630630 - 710710 - 800800 - 900900 - 10001000 - 11201120 - 12501250 - 14001400 - 16001600 - 18001800 - 20002000 - 22402240 - 25002500 - 28002800 - 3150a ➢1calculators/tolerances/tol?dev=a||A ➢-270-270-280-290-290-300-300-310-320-340-360-380-410-460-520-580-660-740-820-920-1050-1200-1350-1500-1650XXXXXXXXXXXXXXXXb ➢2calculators/tolerances/tol?dev=b||B ➢-140-140-150-150-150-160-160-170-180-190-200-220-240-260-280-310-340-380-420-480-540-600-680-760-840XXXXXXXXXXXXXXXXc ➢3calculators/tolerances/tol?dev=c||C ➢-60-70-80-95-95-110-110-120-130-140-150-170-180-200-210-230-240-260-280-300-330-360-400-440-480-520-580-640-700-780-860-940-1050-1150-1300-1450-1600-1800-2000-2200-2500cd ➢4calculators/tolerances/tol?dev=cd||CD ➢-34-46-56XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXd ➢5calculators/tolerances/tol?dev=d||D ➢-20-30-40-50-50-65-65-80-80-100-100-120-120-145-145-145-170-170-170-190-190-210-210-230-230-260-260-290-290-320-320-350-350-390-390-430-430-480-480-520-520e ➢6calculators/tolerances/tol?dev=e||E ➢-14-20-25-32-32-40-40-50-50-60-60-72-72-85-85-85-100-100-100-110-110-125-125-135-135-145-145-160-160-170-170-195-195-220-220-240-240-260-260-290-290ef ➢7calculators/tolerances/tol?dev=ef||EF ➢-10-14-18XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf ➢8calculators/tolerances/tol?dev=f||F ➢-6-10-13-16-16-20-20-25-25-30-30-36-36-43-43-43-50-50-50-56-56-62-62-68-68-76-76-80-80-86-86-98-98-110-110-120-120-130-130-145-145fg ➢9calculators/tolerances/tol?dev=fg||FG ➢-4-6-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXg ➢10calculators/tolerances/tol?dev=g||G ➢-2-4-5-6-6-7-7-9-9-10-10-12-12-14-14-14-15-15-15-17-17-18-18-20-20-22-22-24-24-26-26-28-28-30-30-32-32-34-34-38-38h ➢11calculators/tolerances/tol?dev=h||H ➢00000000000000000000000000000000000000000js ➢12calculators/tolerances/tol?dev=js||JS ➢00000000000000000000000000000000000000000j ➢13calculators/tolerances/tol?dev=j||J ➢-4-6-8-10-10-12-12-14-14-18-18-22-22-26-26-26-30-30-30-36-36-39-39-43-43XXXXXXXXXXXXXXXXk ➢14calculators/tolerances/tol?dev=k||K ➢01111222222333334444444550000000000000000m ➢15calculators/tolerances/tol?dev=m||M ➢2467788991111131315151517171720202121232326263030343440404848585868687676n ➢16calculators/tolerances/tol?dev=n||N ➢481012121515171720202323272727313131343437374040444450505656666678789292110110135135p ➢17calculators/tolerances/tol?dev=p||P ➢612151818222226263232373743434350505056566262686878788888100100120120140140170170195195240240r ➢18calculators/tolerances/tol?dev=r||R ➢101519232328283434414351546365687780849498108114126132150155175185210220250260300330370400440460550580s ➢19calculators/tolerances/tol?dev=s||S ➢14192328283535434353597179921001081221301401581701902082322522803103403804304705205806407208209201000110012501400t ➢20calculators/tolerances/tol?dev=t||T ➢000XXX4148546675911041221341461661801962182402682943303604004505005606206807808409601050120013501500165019002100u ➢21calculators/tolerances/tol?dev=u||U ➢1823283333414860708710212414417019021023625828431535039043549054060066074084094010501150130014501600185020002300250029003200v ➢22calculators/tolerances/tol?dev=v||V ➢000X39475568811021201461722022282522843103403854254755305956607408209201000115013001450160018002000230025002800310035003900x ➢23calculators/tolerances/tol?dev=x||X ➢202834404554648097122146178210248280310340385425475525590660740820XXXXXXXXXXXXXXXXy ➢24calculators/tolerances/tol?dev=y||Y ➢000XX6375941141441742142543003403804254705205806507308209201000XXXXXXXXXXXXXXXXz ➢25calculators/tolerances/tol?dev=z||Z ➢26354250607388112136172210258310365415465520575640710790900100011001250XXXXXXXXXXXXXXXXza ➢26calculators/tolerances/tol?dev=za||ZA ➢32425264779811814818022627433540047053560067074082092010001150130014501600XXXXXXXXXXXXXXXXEngineering FitsEngineering fit refers to the degree of tightness or looseness between two mating parts in an assembly. It is defined by combining a hole with a tolerance class and a shaft with a tolerance class. (See definition of terms above).Several standards define recommended pairings for different applications. The values presented in our charts and Calculator are based on ISO 286-1:2010 (In earlier revisions, it was separated into ISO 1829, which is now obsolete). In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. The ANSI tolerancing system is nearly equivalent to ISO 286 but not identical. The difference is typically 0.1-0.5 thous.Main Fit TypesClearance FitA clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

Large flour milling companies continue their efforts to acquire smaller competitors or complete mergers. Expanding operations can create economies of scale, lowering costs an...

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Discover where business activity is most concentrated in an industry and the factors driving these trends to find opportunities and conduct regional benchmarking.

Analysts also use industry specific sources to complement catch-all sources, although their perspective may focus on a particular organization or representative body, rather than a clear overview of all industry operations. However, when balanced against other perspectives, industry-specific sources provide insights into industry trends.

The Flour Milling industry in Canada has experienced strong growth over the five years to 2023 amid a surge in demand for Canadian flour milling products in 2022 and 2023. The industry includes operators that produce flour products from milling grains, rice millers, and malt manufacturers. Flour is the largest product segment, and heightened demand for Canadian flour has buoyed industry growth. Malt manufacturing has also driven the industry's growth, given that Canada is the second-largest exporter of malt in the world. Overall, industry revenue is expected to expand an annualized 11.4% to $4.7 billion over the five years to 2023. Revenue is forecast to grow 24.2% in 2023 alone as increased demand for gluten-free and specialty flours and the war in Ukraine have all boosted demand for Canadian products.The industry has been primarily affected by foreign flour millers' performance or lack thereof in recent years. As a result of the war in Ukraine, there is a growing demand for Canadian wheat from overseas markets. This is because Canadian wheat is seen as a reliable source of wheat. Canadian wheat is also a high-quality product, and it is in demand by food manufacturers who produce baked goods, pasta, and other wheat-based products. Exports have surged in 2022 and 2023, causing revenue to spike. Growing demand for wheat in China has benefited Canadian flour millers, as the increasing affluence of the Chinese population has resulted in a rise in exports to China. Industry revenue is forecast to grow an annualized 0.7% to $4.9 billion over the five years to 2028. Rising per capita disposable income will likely enable consumers to purchase more expensive gluten-free and specialty flours. Consumer preferences are anticipated to continue changing, and demand for healthier and more convenient foods will likely rise. This is a challenge for flour millers who need to adapt their products to meet the changing needs of consumers. However, the prices of several agricultural commodities, including wheat and corn, are expected to fall. A decline in input prices prevents millers from hiking prices for consumers, decelerating revenue growth and putting pressure on profit.

A clearance fit is a type in which the shaft is smaller than the hole it is inserted into, allowing for free movement, assembly, and disassembly. Clearance fits can range from loose-running for assemblies that need a significant gap for free movement or to accommodate temperature variation to locational clearance for stationary parts that need to be freely assembled/disassembled but still maintain accuracy.Transition FitA transition fit is a type in which the shaft may be slightly smaller or larger than the hole (before assembly). It is used to create a tight and secure connection between them in applications requiring high precision and stability. It provides high accuracy, but the connecting parts can be disassembled and reassembled without damage. However, force cannot be transmitted.Press Fit (Interference)An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

List of flourmilling companies

Developing strong relationships with suppliers, negotiating favorable terms, and ensuring efficient procurement of raw materials (like wheat) can help control costs. Streamli...

Hole refers to an internal feature of a workpiece, typically a bore. However, the term can be used to describe any internal feature. For example, a keyway.

The shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

An interference (Press) fit is a type in which the shaft is larger than the hole (before assembly). It creates a frictional force that holds the parts together without the need for additional fasteners or adhesives. The interference fit is commonly used in mechanical engineering to create solid and reliable connections between components that need to withstand heavy loads or vibrations. However, It is hard to disassemble without damaging the parts. Some degree of force can be transmitted between the components.Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Fits are also divided into two types of “basis”There are no technical differences between the two basis. Therefore the choice of the system should be based on economic reasons.Hole Basis FitsThe hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

Calculator OptionsTolerances for holes.Tolerances for shafts.Fit for hole/shaft combinations.Metric/Inch results.Standard/Custom tolerances.

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The hole deviation is zero (meaning an H), and the shaft deviation varies to create different fit levels. For example, H9/d8 , H7/g6. It is the first choice of combinations for general use, since it avoids an unnecessary multiplicity of tools (e.g., reamers) and gaugesShaft Basis FitsThe shaft deviation is zero (meaning an h), and the hole deviation varies to create different fit levels. For example, D9/h9, G7/h6. This method should only be utilized when it offers clear economic benefits, such as in situations where it is required to assemble multiple parts with holes that have varying deviations onto a single shaft.Fits Standard Combinations ChartsFor ordinary engineering purposes, only a small number of the many (~150,000) possible fit combinations is required. ISO 286-1:2010 lists about 80 fit combinations that meet most of the needs of any engineering task. You can choose from this list or define a custom combination in our Fit Calculator.(*) In North America, additional fit combinations are sometimes used per ANSI B4.1 & B4.2. You can find below the ISO charts also the ANSI Charts.Click the Fit Link (e.g. G7/h6 ➢) to get its detailed tolerances in both Inch and millimetersHole Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Shaft Basis Fits (ISO 286-1)fit_typeFitFit LevelPreferedc_idfit_sortFit typeLeveliH10/b9 ➢DGNC1Clearance Fit6.00iH11/b11 ➢DGYC1Clearance Fit6.00iH10/c9 ➢DGNC1Clearance Fit5.00iH11/c11 ➢DGYC1Clearance Fit5.00iH8/d8 ➢GRNC1Clearance Fit4.00iH9/d8 ➢GRNC1Clearance Fit4.00iH10/d9 ➢GRYC1Clearance Fit4.00iH11/d10 ➢GRNC1Clearance Fit4.00iH10/e9 ➢GRNC1Clearance Fit3.00iH9/e8 ➢GRYC1Clearance Fit3.00iH8/e8 ➢GRYC1Clearance Fit3.00iH8/e7 ➢GRNC1Clearance Fit3.00iH7/f6 ➢LGNC1Clearance Fit2.00iH9/f8 ➢LGNC1Clearance Fit2.00iH8/f8 ➢LGNC1Clearance Fit2.00iH8/f7 ➢LGYC1Clearance Fit2.00iH7/g6 ➢LGYC1Clearance Fit1.00iH6/g5 ➢LGNC1Clearance Fit1.00iH10/h9 ➢LGYC1Clearance Fit0.00iH11/h10 ➢LGNC1Clearance Fit0.00iH9/h8 ➢LGNC1Clearance Fit0.00iH8/h8 ➢LGNC1Clearance Fit0.00iH6/h5 ➢LGNC1Clearance Fit0.00iH7/h6 ➢LGYC1Clearance Fit0.00iH8/h7 ➢LGYC1Clearance Fit-1.00iH6/js5 ➢orNT2Transition Fit-1.00iH7/js6 ➢orYT2Transition Fit-1.00iH8/k7 ➢orNT2Transition Fit-3.00iH6/k5 ➢orNT2Transition Fit-3.00iH7/k6 ➢orYT2Transition Fit-3.00iH7/m6 ➢orNT2Transition Fit-5.00iH6/m5 ➢orNT2Transition Fit-5.00iH8/m7 ➢orNT2Transition Fit-5.00iH7/n6 ➢orYT2Transition Fit-6.00iH8/js7 ➢orNT2Transition Fit-11.00iH6/n5 ➢LRNI3Press Fit (Interference)-6.00iH7/p6 ➢LRYI3Press Fit (Interference)-8.00iH6/p5 ➢LRNI3Press Fit (Interference)-8.00iH7/r6 ➢LRYI3Press Fit (Interference)-10.00iH7/s6 ➢RDYI3Press Fit (Interference)-11.00iH8/s7 ➢RDNI3Press Fit (Interference)-11.00iH7/t6 ➢RDNI3Press Fit (Interference)-12.00iH7/u6 ➢DRNI3Press Fit (Interference)-13.00iH8/u7 ➢DRNI3Press Fit (Interference)-13.00iH7/x6 ➢DRNI3Press Fit (Interference)-16.00Fit Combinations Per ANSI B4.1The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors. wdt_IDFit NameTolerance Class CombinationFit Typeth1RC 1H5/g4Running or Slidining Fits52RC 2H6/g5Running or Slidining Fits63RC 3H7/f6Running or Slidining Fits74RC 4H8/f7Running or Slidining Fits85RC 5H8/e7Running or Slidining Fits86RC 6H9/e8Running or Slidining Fits97RC 7H9/d8Running or Slidining Fits98RC 8H10/c9Running or Slidining Fits109RC 9H11/sh1Running or Slidining Fits1110LC 1H6/h5Clearance Location Fits611LC 2H7/h6Clearance Location Fits712LC 3H8/h7Clearance Location Fits813LC 4H10/h9Clearance Location Fits1014LC 5H7/g6Clearance Location Fits715LC 6H9/f8Clearance Location Fits916LC 7H10/e9Clearance Location Fits1017LC 8H10/d9Clearance Location Fits1018LC 9H11/c10Clearance Location Fits1119LC 10H12/sh2Clearance Location Fits1220LC 11H13/sh3Clearance Location Fits1321LT 1H7/js6Transition Fits722LT 2H8/js7Transition Fits823LT 3H7/k6Transition Fits724LT 4H8/k7Transition Fits825LT 5H7/n6Transition Fits726LT 6H7/n7Transition Fits727LN 1H6/n5Interference Location Fits628LN 2H7/p6Interference Location Fits729LN 3H7/r6Interference Location Fits730FN 1H6/sh4Force or Shrink Fits631FN 2H7/s6Force or Shrink Fits732FN 3H7/t6Force or Shrink Fits733FN 4H7/u6Force or Shrink Fits734FN 5H8/x7Force or Shrink Fits8Fit Combinations Per ANSI B4.2The tolerance classes mentioned in ANSI B4.1 (e.g., h9, g6, etc.) have the same nomenclature as in ISO 286. It could lead a confusion since the ANSI standard also defines the fundamental deviations and the tolerance grade on its own. The ANSI tolerancing system is nearly the same as the ISO 286 but not identical. If you take the values from the standard ISO charts or use our Online Calculator, you should expect about 0.1-0.5 thous errors.ClassificationHole BasisShaft BasisDescriptionClearanceH11/c11C11/h11Loose running fit for wide commercial tolerances or allowances on external members.H9/d9D9/h9Free running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journal pressures.H8/f7F8/h7Close running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.H7/g6G7/h6Sliding fit not intended to run freely, but to move and turn freely and locate accurately.H7/h6H7/h6Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled.InterferenceH7/k6K7/h6Locational transition fit for accurate location, a compromise between clearance and interference.H7/n6N7/h6Locational transition fit for more accurate location where greater interference is permissible.TransitionH7/p6P7/h6Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements.H7/s6S7/h6Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.H7/u6U7/h6Force fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical.Related Glossary Terms:Thou

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