\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

As shown in the formula below, feed is ℓ (cutting length per minute) ÷n (main axis spindle speed). (Cutting length per minute) ÷ (RPM) is the movement of the cutting edge during one work rotation.

Chip Load (Maximum chip thickness) is one of the most important parameters for achieving a productive and reliable milling process. Effective cutting will only be obtained when the Chip Load is in the correct range appropriate for a specific cutter. The best practice is to get it from the supplier’s catalog, but if you don’t have it, you can use our Chip Load Calculator, giving you a good starting point.A Chip Load (Maximum Chip Thickness) that is too low can cause poor performance due to rubbing, resulting in poor tool life or chip formation.A Chip Load that is too high will overload the cutting edge, leading to fast wear and even breakage.The Chip Thinning Factor (CTF) enables you to calculate the Feed Per Tooth that will yield the desired Chip Load.There are two Chp Thinning Factors:RCTF – Radial Chip Thinning Factor.ACTF – Axial Chip Thinning Factor.The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

* Since the cutting edge is “feeling” is the Chip Load (And not the Feed Per Tooth), The Feed can be increased until the maximum recommended chip load is reached.* The factor by which the feed can be multiplied is called the Axial Chip Thinning Factor [ACTF].

Axialchip thinning

When the cutting edge approaches the material at a 90° angle, the Feed Per Tooth [Fz] Equals the Chip Load (Chip Thickness) [Cl]

CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

Chip thinningformula

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Radialchip thinningformula

* THE PHENOMENON OF REDUCTION IN THE MAXIMUM CHIP THICKNESS RELATIVE TO THE FEED PER TOOTH IS CALLED CHIP THINNING.* WHEN SUCH A REDUCTION IS THE RESULT OF THE RADIAL DEPTH OF CUT, IT IS CALLED RADIAL CHIP THINNING.

* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

* Since the cutting edge is “feeling” is the Chip Load (And not the Feed Per Tooth), The Feed can be increased until the maximum recommended chip load is reached.* The factor by which the feed can be multiplied is called the Axial Chip Thinning Factor [ACTF].

* When Ae

The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

What is radialchip thinning

There are two Chp Thinning Factors:RCTF – Radial Chip Thinning Factor.ACTF – Axial Chip Thinning Factor.The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

Important Remark: The Term “Axial Chip Thinning” is misleading. It comes from the fact that in a round shape cutter the chip thinning is a function of the axial depth. However, As explained above, it is actually a result of the approach angle. In feedmills and chamfer cutters, the axial depth has no effect on the chip thickness. A more appropriate term would be “Approach Angle Chip THinning”. However, to be consistent with the common nickname we refer to it as “Axial Chip Thinning”.CONCLUSION* Since the cutting edge is “feeling” is the Chip Load (And not the Feed Per Tooth), The Feed can be increased until the maximum recommended chip load is reached.* The factor by which the feed can be multiplied is called the Axial Chip Thinning Factor [ACTF].Axial Chip Thinning FormulasChamfer CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).KAPR – Approach AnglesACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \huge \frac { 1}{\sin { \left ( kapr \right )}} \)\( \large F_z = ACFT \times C_l \)Ballnose CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).Ap– Depth Of CutD – Ball Diameter.ACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \frac {\huge D}{\sqrt{\huge D^{2} \ – \ {\left [ D \ – \ 2 \ \times \ Ap\right ]}^2}} \)\( \large F_z = ACFT \times C_l \)Round insert CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).Ap– Depth Of CutIC – Insert size (Inscribed circle.)ACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \frac {\huge 1}{\sqrt{\huge \ \frac{4 \times ap}{IC} \ – \ {\left [ \frac{2 \times ap}{IC} \right ]}^2}} \)\( \large F_z = ACFT \times C_l \) Related Glossary Terms:MillingRadial Depth of Cut (Milling AE)Chip LoadFeed Per ToothCutting Edge

Radial Chip Thinning CalculatorPayment options Axial Chip Thinning CalculatorPayment options Chip Thinning ExplainedChip Load (Maximum chip thickness) is one of the most important parameters for achieving a productive and reliable milling process. Effective cutting will only be obtained when the Chip Load is in the correct range appropriate for a specific cutter. The best practice is to get it from the supplier’s catalog, but if you don’t have it, you can use our Chip Load Calculator, giving you a good starting point.A Chip Load (Maximum Chip Thickness) that is too low can cause poor performance due to rubbing, resulting in poor tool life or chip formation.A Chip Load that is too high will overload the cutting edge, leading to fast wear and even breakage.The Chip Thinning Factor (CTF) enables you to calculate the Feed Per Tooth that will yield the desired Chip Load.There are two Chp Thinning Factors:RCTF – Radial Chip Thinning Factor.ACTF – Axial Chip Thinning Factor.The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

RadialChip ThinningCalculator

When the cutting edge approaches the material at an angle smaller than 90°, the Feed Per Tooth [Fz] is greater than the Chip Load (Chip Thickness) [Cl]

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The Chip Thinning Factor (CTF) enables you to calculate the Feed Per Tooth that will yield the desired Chip Load.There are two Chp Thinning Factors:RCTF – Radial Chip Thinning Factor.ACTF – Axial Chip Thinning Factor.The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

In a “Classic” milling operation, the Radial Depth of Cut [Ae] is greater or equal to the cutter’s radius, and the angle is 90°. In such cases, The Chip Load equals the Feed Per Tooth.

When the Radial Depth of Cut [Ae] is smaller than the cutter’s radius, OR the cutter’s shape is not 90° (Chamfer, Ballnose, etc.), The Chip Load is smaller than the Feed per Tooth. This reduction in Chip Load is called “Chip Thinning”.

When machining a 10 mm diameter shaft, lets says a 100 mm length is machined in 1 minute, at 1,000 RPM. This means that the cutting length per minute is 100 mm/min.

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Chip Thinning allows dramatic productivity gain since you can multiply the Feed by the Chip Thinning Factor while keeping the Chip Load within the recommended range!

Why Is Chip Thinning Important?Chip Thinning allows dramatic productivity gain since you can multiply the Feed by the Chip Thinning Factor while keeping the Chip Load within the recommended range!

Cutting speed (when turning) is the peripheral speed of the work and the amount of insert movement in metres per minute. (π x Dm) of the formula below is the periphery of the work. The periphery x n (RPM) is millimeters the cutting edge moves on the periphery of the work in a minute. It is usually expressed in m/min. Divide by 1,000 to change to m from mm.

CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

CONCLUSION* Since the cutting edge is “feeling” is the Chip Load (And not the Feed Per Tooth), The Feed can be increased until the maximum recommended chip load is reached.* The factor by which the feed can be multiplied is called the Axial Chip Thinning Factor [ACTF].

Chip Thinning ExplainedChip Load (Maximum chip thickness) is one of the most important parameters for achieving a productive and reliable milling process. Effective cutting will only be obtained when the Chip Load is in the correct range appropriate for a specific cutter. The best practice is to get it from the supplier’s catalog, but if you don’t have it, you can use our Chip Load Calculator, giving you a good starting point.A Chip Load (Maximum Chip Thickness) that is too low can cause poor performance due to rubbing, resulting in poor tool life or chip formation.A Chip Load that is too high will overload the cutting edge, leading to fast wear and even breakage.The Chip Thinning Factor (CTF) enables you to calculate the Feed Per Tooth that will yield the desired Chip Load.There are two Chp Thinning Factors:RCTF – Radial Chip Thinning Factor.ACTF – Axial Chip Thinning Factor.The two factors are independent and should be applied one on top of the other:\( \large CTF = RTCF \times ACTF \)\( \large F_z= Recomended \ Chip \ Load * CTF \) Radial Chip ThinningIn a milling operation, the Chip Thickness varies between the point of entry (A) and the Point of Exit (C).At the Point of Exit (C), the thickness is always Zero.When the radial depth of cut (Ae) is larger than the cutter’s radius, the chip thickness starts with a certain value. It gradually grows unit it reaches its maximum thickness at the cutter’s center (B). At this point, the Maximum Chip Thickness equals the Feed Per Tooth.After that, the Chip Thickness gradually gets smaller until it reaches zero at the exit point (C). CONCLUSION* When Ae>=R (Cutter Radius) the Maximum Chip thickness is constant and is equal to the Feed per tooth.* When Ae

Chip thinningCalculator

Table of ContentsWhat Is Chip Thinning?Radial Chip Thinning CalculatorAxial Chip Thinning CalculatorChip Thinning Explained

Chip Thinning allows dramatic productivity gain since you can multiply the Feed by the Chip Thinning Factor while keeping the Chip Load within the recommended range!

The same principle also works on round cutting edges (Such as ballnose and milling cutters with round inserts). In such cases, the approach angle is the tangent to the cutting edge’s radius at the deepest point of engagement.

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You can check out a real-life example in this articleRadial Chip Thinning FormulasFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).Ae – Radial Depth of Cut.D – Cutter Effective Diameter.RCTF – Radial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large RCTF = \frac {\huge 1}{\huge \sqrt{1 – \left [ 1 – \frac {2 \times A_e}{D} \right ]^{2}}} \)\( \large F_z = RCTF \times C_l \)Axial Chip ThinningWhen the cutting edge approaches the material at a 90° angle, the Feed Per Tooth [Fz] Equals the Chip Load (Chip Thickness) [Cl]When the cutting edge approaches the material at an angle smaller than 90°, the Feed Per Tooth [Fz] is greater than the Chip Load (Chip Thickness) [Cl]The same principle also works on round cutting edges (Such as ballnose and milling cutters with round inserts). In such cases, the approach angle is the tangent to the cutting edge’s radius at the deepest point of engagement.Important Remark: The Term “Axial Chip Thinning” is misleading. It comes from the fact that in a round shape cutter the chip thinning is a function of the axial depth. However, As explained above, it is actually a result of the approach angle. In feedmills and chamfer cutters, the axial depth has no effect on the chip thickness. A more appropriate term would be “Approach Angle Chip THinning”. However, to be consistent with the common nickname we refer to it as “Axial Chip Thinning”.CONCLUSION* Since the cutting edge is “feeling” is the Chip Load (And not the Feed Per Tooth), The Feed can be increased until the maximum recommended chip load is reached.* The factor by which the feed can be multiplied is called the Axial Chip Thinning Factor [ACTF].Axial Chip Thinning FormulasChamfer CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).KAPR – Approach AnglesACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \huge \frac { 1}{\sin { \left ( kapr \right )}} \)\( \large F_z = ACFT \times C_l \)Ballnose CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).Ap– Depth Of CutD – Ball Diameter.ACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \frac {\huge D}{\sqrt{\huge D^{2} \ – \ {\left [ D \ – \ 2 \ \times \ Ap\right ]}^2}} \)\( \large F_z = ACFT \times C_l \)Round insert CuttersFz – Feed Per Tooth. The goal is to calculate the Fz that will create the recommended Chip Load.Cl – Chip Load. (Recommended by the tools supplier or from our Chip Load Calculator).Ap– Depth Of CutIC – Insert size (Inscribed circle.)ACTF – Axial Chip Thinning Factor. The ratio between the Chip Load (Cl) and the Feed per Tooth (Fz)\( \large ACFT = \frac {\huge 1}{\sqrt{\huge \ \frac{4 \times ap}{IC} \ – \ {\left [ \frac{2 \times ap}{IC} \right ]}^2}} \)\( \large F_z = ACFT \times C_l \) Related Glossary Terms:MillingRadial Depth of Cut (Milling AE)Chip LoadFeed Per ToothCutting Edge