CNC machines are programmed by the spindle speed (RPM), but cutting data is typically given in SFM. Therefore it is common that we need to compute the SFM from a given RPM to determine the cutting speed at which our cutting tool is working. It is calculated by dividing the cutter’s circumference by the cutting speed.

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Find out the SFM according to your tool’s diameter and the machines RPMRPM2 mm3 mm4 mm5 mm6 mm8 mm10 mm12 mm16 mm20 mm25 mm1002345681012162126200468101216212533415230069121519253137496277400812162125334149668210350010152126314152628210312960012192531374962749912415570014222936435872871151441808001625334149668299132165206900192837465674931111481862321,0002131415262821031241652062581,1002334455768911131361812272831,2002537496274991241481982473091,30027405467801071341612142683351,40029435872871151441732312893611,50031466277931241551862473093872,0004162821031241652062473304125152,50052771031291552062583094125156443,00062931241551862473093714956187733,500721081441802162893614335777219024,000821241652062473304124956608251,0314,500931391862322783714645577429281,1605,0001031552062583094125156188251,0311,2885,5001131702272833404545676809071,1341,4176,0001241862473093714956187429891,2371,5466,5001342012683354025366708041,0721,3401,6757,0001442162893614335777218661,1541,4431,8047,5001552323093874646187739281,2371,5461,9338,0001652473304124956608259891,3191,6492,0618,5001752633504385267018761,0511,4021,7522,1909,0001862783714645577429281,1131,4841,8552,3199,5001962943924905887839791,1751,5671,9582,44810,0002063094125156188251,0311,2371,6492,0612,57711,0002273404545676809071,1341,3611,8142,2682,83412,0002473714956187429891,2371,4841,9792,4743,09213,0002684025366708041,0721,3401,6082,1442,6803,35014,0002894335777218661,1541,4431,7322,3092,8863,60715,0003094646187739281,2371,5461,8552,4743,0923,865Related Glossary Terms:CNC MachineRPMCutting SpeedCircumference

CNC machines are programmed by the spindle speed (RPM), but cutting data is typically given in SFM. Therefore it is common that we need to compute the SFM from a given RPM to determine the cutting speed at which our cutting tool is working. It is calculated by dividing the cutter’s circumference by the cutting speed.

High speed slitting saw blades, ideal for providing hollow ground to give clearance for deep cutting. Use in conjunction with our slitting saw arbors for flexibility with your work.

Find out the SFM according to your tool’s diameter and the machine’s RPMRPM1/16"1/8"3/16"1/4"3/8"1/2"5/8"3/4"7/8"1"1-1/2"2"100235710131620232639522003710132026333946527910530051015202939495969791181574007132026395265799210515720950081625334965829811513119626260010202939597998118137157236314700112334466992115137160183275367800132639527910513115718320931441990015294459881181471772062363534711,00016334965981311641962292623935241,100183654721081441802162522884325761,200203959791181571962362753144716281,300214364851281702132552983405116811,400234669921371832292753213675507331,500254974981471962452953443935897852,0003365981311962623273934585247851,0472,50041821231642453274094915736549821,3093,00049981471962953934915896877851,1781,5713,500571151722293444585736878029161,3741,8334,000651311962623935246547859161,0471,5712,0944,500741472212954425897368841,0311,1781,7672,3565,000821642453274916548189821,1451,3091,9632,6185,500901802703605407209001,0801,2601,4402,1602,8806,000981962953935897859821,1781,3741,5712,3563,1426,5001062133194256388511,0641,2761,4891,7022,5533,4037,0001152293444586879161,1451,3741,6041,8332,7493,6657,5001232453684917369821,2271,4731,7181,9632,9453,9278,0001312623935247851,0471,3091,5711,8332,0943,1424,1898,5001392784175568341,1131,3911,6691,9472,2253,3384,4519,0001472954425898841,1781,4731,7672,0622,3563,5344,7129,5001553114666229331,2441,5541,8652,1762,4873,7314,97410,0001643274916549821,3091,6361,9632,2912,6183,9275,23611,0001803605407201,0801,4401,8002,1602,5202,8804,3205,76012,0001963935897851,1781,5711,9632,3562,7493,1424,7126,28313,0002134256388511,2761,7022,1272,5532,9783,4035,1056,80714,0002294586879161,3741,8332,2912,7493,2073,6655,4987,33015,0002454917369821,4731,9632,4542,9453,4363,9275,8907,854RPM to SFM Chart (Metric)Find out the SFM according to your tool’s diameter and the machines RPMRPM2 mm3 mm4 mm5 mm6 mm8 mm10 mm12 mm16 mm20 mm25 mm1002345681012162126200468101216212533415230069121519253137496277400812162125334149668210350010152126314152628210312960012192531374962749912415570014222936435872871151441808001625334149668299132165206900192837465674931111481862321,0002131415262821031241652062581,1002334455768911131361812272831,2002537496274991241481982473091,30027405467801071341612142683351,40029435872871151441732312893611,50031466277931241551862473093872,0004162821031241652062473304125152,50052771031291552062583094125156443,00062931241551862473093714956187733,500721081441802162893614335777219024,000821241652062473304124956608251,0314,500931391862322783714645577429281,1605,0001031552062583094125156188251,0311,2885,5001131702272833404545676809071,1341,4176,0001241862473093714956187429891,2371,5466,5001342012683354025366708041,0721,3401,6757,0001442162893614335777218661,1541,4431,8047,5001552323093874646187739281,2371,5461,9338,0001652473304124956608259891,3191,6492,0618,5001752633504385267018761,0511,4021,7522,1909,0001862783714645577429281,1131,4841,8552,3199,5001962943924905887839791,1751,5671,9582,44810,0002063094125156188251,0311,2371,6492,0612,57711,0002273404545676809071,1341,3611,8142,2682,83412,0002473714956187429891,2371,4841,9792,4743,09213,0002684025366708041,0721,3401,6082,1442,6803,35014,0002894335777218661,1541,4431,7322,3092,8863,60715,0003094646187739281,2371,5461,8552,4743,0923,865Related Glossary Terms:CNC MachineRPMCutting SpeedCircumference

CNC machines are programmed by the spindle speed (RPM), but cutting data is typically given in SFM. Therefore it is common that we need to compute the SFM from a given RPM to determine the cutting speed at which our cutting tool is working. It is calculated by dividing the cutter’s circumference by the cutting speed.RPM to RPM Chart (Inch)Find out the SFM according to your tool’s diameter and the machine’s RPMRPM1/16"1/8"3/16"1/4"3/8"1/2"5/8"3/4"7/8"1"1-1/2"2"100235710131620232639522003710132026333946527910530051015202939495969791181574007132026395265799210515720950081625334965829811513119626260010202939597998118137157236314700112334466992115137160183275367800132639527910513115718320931441990015294459881181471772062363534711,00016334965981311641962292623935241,100183654721081441802162522884325761,200203959791181571962362753144716281,300214364851281702132552983405116811,400234669921371832292753213675507331,500254974981471962452953443935897852,0003365981311962623273934585247851,0472,50041821231642453274094915736549821,3093,00049981471962953934915896877851,1781,5713,500571151722293444585736878029161,3741,8334,000651311962623935246547859161,0471,5712,0944,500741472212954425897368841,0311,1781,7672,3565,000821642453274916548189821,1451,3091,9632,6185,500901802703605407209001,0801,2601,4402,1602,8806,000981962953935897859821,1781,3741,5712,3563,1426,5001062133194256388511,0641,2761,4891,7022,5533,4037,0001152293444586879161,1451,3741,6041,8332,7493,6657,5001232453684917369821,2271,4731,7181,9632,9453,9278,0001312623935247851,0471,3091,5711,8332,0943,1424,1898,5001392784175568341,1131,3911,6691,9472,2253,3384,4519,0001472954425898841,1781,4731,7672,0622,3563,5344,7129,5001553114666229331,2441,5541,8652,1762,4873,7314,97410,0001643274916549821,3091,6361,9632,2912,6183,9275,23611,0001803605407201,0801,4401,8002,1602,5202,8804,3205,76012,0001963935897851,1781,5711,9632,3562,7493,1424,7126,28313,0002134256388511,2761,7022,1272,5532,9783,4035,1056,80714,0002294586879161,3741,8332,2912,7493,2073,6655,4987,33015,0002454917369821,4731,9632,4542,9453,4363,9275,8907,854RPM to SFM Chart (Metric)Find out the SFM according to your tool’s diameter and the machines RPMRPM2 mm3 mm4 mm5 mm6 mm8 mm10 mm12 mm16 mm20 mm25 mm1002345681012162126200468101216212533415230069121519253137496277400812162125334149668210350010152126314152628210312960012192531374962749912415570014222936435872871151441808001625334149668299132165206900192837465674931111481862321,0002131415262821031241652062581,1002334455768911131361812272831,2002537496274991241481982473091,30027405467801071341612142683351,40029435872871151441732312893611,50031466277931241551862473093872,0004162821031241652062473304125152,50052771031291552062583094125156443,00062931241551862473093714956187733,500721081441802162893614335777219024,000821241652062473304124956608251,0314,500931391862322783714645577429281,1605,0001031552062583094125156188251,0311,2885,5001131702272833404545676809071,1341,4176,0001241862473093714956187429891,2371,5466,5001342012683354025366708041,0721,3401,6757,0001442162893614335777218661,1541,4431,8047,5001552323093874646187739281,2371,5461,9338,0001652473304124956608259891,3191,6492,0618,5001752633504385267018761,0511,4021,7522,1909,0001862783714645577429281,1131,4841,8552,3199,5001962943924905887839791,1751,5671,9582,44810,0002063094125156188251,0311,2371,6492,0612,57711,0002273404545676809071,1341,3611,8142,2682,83412,0002473714956187429891,2371,4841,9792,4743,09213,0002684025366708041,0721,3401,6082,1442,6803,35014,0002894335777218661,1541,4431,7322,3092,8863,60715,0003094646187739281,2371,5461,8552,4743,0923,865Related Glossary Terms:CNC MachineRPMCutting SpeedCircumference

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