END MILL DIAMETER THEORETICAL FEEDS AND SPEEDS DEPTH OF CUT MATERIAL TYPE TOOL MATERIAL 3/4 1/2 5/8 .02 .06 DIA/440 1018 1018 1018 H.S.S. CARBIDE H.S.S. 100 150 200 BRINNEL HARDNESS # CUTTING SPEED 190 SFM FEET PER MINUTE (FROM CHART) UNITS OF CUTTING SPEED RPM FORMULA (LONG) RPM FORMULA (SHORT) CALCULATE RPM (LONG) CALCULATE RPM(SHORT) FEED PER TOOTH (Ft) (FROM CHART) NUMBER OF TEETH (N) FEED FORMULA (Fm) (Use long RPM) CALCULATE FEED UNITS OF FEED 1520 1451 0.002 11.608 RPM 12 x CUTTING SPEED π x DIAMETER RPM 4x CUTTING SPEED - DIAMETER 1000 4 Fm Ft x RPM N INCHES PER MINUTE 4 End Milling-Peripheral 2.6 HIGH SPEED STEEL TOOL CARBIDE TOOL FEED RADIAL FEED TOOL in/tooth MATERIAL HARD- NESS CONDITION DEPTH OF CUT in/tooth SPEED mm/looth TOOL MATL. MATL SPEED mm/tooth GRADE CUTTER DIAMETER CUTTER DIAMETER in Bhn mm 020 001 190 fpm 3/8 in 1/2 in 3/4 in 1-2 in m/min 10mm 12mm 18mm 25-50mm .005 .004 .002 AISI fpm ISO 550 M2, 3/8 in 1/2 in 3/4 in 1-2 in m/min 10mm 12mm 18mm 25-50mm .0015 .0035 .006 C ISO .007 Low Carbon 060 145 .002 003 .005 .006 M3, 425 .0025 .004 .006 .008 C-5 1011 1022 1013 1026 85 Hot Rolled, Normalized, dia/4 .001 130 .002 .004 .005 M7 365 .002 .003 .005 .006 dia/2 115 .0007 .001 .003 .004 340 .0015 .002 .004 .005 1016 1029 to 1018 1513 125 Annealed 25 58 .025 .050 102 13 S4. 1038 170 089 15 18 or Cold 1.5 44 050 075 13 .15 $5, 130 063 102 .15 20 P20, 1019 1518 Drawn dia/4 40 025 050 102 13 S2 110 050 1075 .13 15 M20 1021 1522 dia/2 35 1018 .025 075 102 105 038 050 102 .13 .020 210 .001 .002 .004 .005 M2, 520 .0015 .0035 .006 .007 .060 160 .002 .003 .005 .006 M3, 400 .0025 .004 .006 .008 C-5 Hot 125 to Rolled, Normalized, dia/4 140 .001 .002 .004 .005 M7 350 .002 .003 .005 .006 dia/2 120 .0007 .001 .003 .004 320 .0015 .002 .004 .005 Annealed 15 64 025 050 102 .13 84. 160 038 089 16 18 175 or Cold 1.5 49 .050 1075 13 16 S5, 120 063 102 15 20 P20, Drawn dia/4 43 025 102 050 13 52 105 1050 .075 13 15 M20 dia/2 37 018 025 075 102 038 100 050 102 .13 .020 170 001 .002 .003 .004 M2, 485 .0015 .003 .005 .006 .060 175 to Hot Rolled, Normalized. 125 .002 .003 .004 .005 M3, 370 .0025 .004 .006 .007 C-5 dia/2 dia/4 110 .001 95 .002 .003 .004 M7 325 .002 .003 .005 .006 .0007 .001 .002 .003 300 .0015 .002 .004 .005 225 Annealed 5 52 025 050 075 102 S4, 150 038 .075 13 15 or Cold 115 38 050 075 102 .13 56. 115 063 102 -15 18 P20, Drawn dia/4 34 025 050 075 102 S2 100 .050 13 075 .15 M20 dia/2 29 018 025 050 075 90 .020 120 .001 060 90 .002 225 Annealed dia/4 dia/2 80 .001 70 .0007 .002 .003 .004 .003 .002 .003 .004 M2, .005 M3, .004 M7 300 .002 .001 .003 280 13 050 102 .038 .002 .004 .005 .001 455 .005 .007 .003 .002 350 .005 .0015 .0025 .004 .001 .002 .003 .004 C-5 or to 275 Cold 5 37 025 050 075 102 S4, 140 Drawn 1.5 27 050 075 102 13 S5 1050 105 dia/4 24 .025 .050 075 102 S2 90 1025 1050 075 038 .063 102 102 13 13 18 P20, 13 M20 dia/2 21 .018 025 050 .075 025 85 050 075 102 .020 200 Medium Carbon .060 1030 1042 1053 1033 1043 1055 125 1035 1037 1045 1526 1044 1525 to 175 Hot Rolled, Normalized, Annealed dia/4 dia/2 .002 .001 .003 .005 150 .002 .004 .002 .001 140 .0007 .001 120 004 .005 M2, 520 .0015 .0035 .005 .007 .006 M3, 400 .0025 .004 .006 .008 C-5 .005 M7 350 .002 .003 .005 .006 .003.004. 320 .0015 .002 .004 .005 .5 60 026 102 13 050 S4. 160 038 089 13 .18 1038 1046 1527 1039 1049 1040 1050 or Cold 1.5 46 050 15 075 13 S5, 120 063 102 15 20 P20. Drawn dia/4 43 .025 .050 102 18 S2 $105 050 075 .13 .15 M20 dia/2 37 018 .025 .075 102 100 038 050 .102 13 .020 160 .001 .002 .003 .004 M2. 485 .0015 .003 .005 .006 175 to 225 Hot Rolled, Normalized, Annealed .060 120 .002 003 .004 .005 M3, 370 .0025 .004 .006 .007 C-5 dia/4 105 dia/2 90 .001 .002 .003 .004 M7 325 .002 .003 .005 .006 .0007 .001 .002 .003 300 .0015 .002 .004 .005 15 49 025 050 075 102 S4, 150 038 075 13 15 or Cold 1.5 37 1050 075 ,102 .13 85, 115 1063 102 .15 .18 P20, Drawn dia/4 32 075 102 Hot Rolled, Normalized, dia/2 .020 .060 025 050 225 Annealed, dia/4 to Cold Drawn dia/2 .025 .050 075 27 .018 110 .001 .002 .003 .004 M2, 430 001 .002 85 .002 .003 .004 .005 M3, 330 .002 .003 75 .001 .002 .003 .004 M7 280 .0015 .0025 65 .002 .0007 .001 .003 265 .001 .002 S2 100 1050 1075 13 15 M20 90 .038 050 102 13 .004 .005 .005 .007 .005 .004 .003 .004 C-5 275 or 15 34 Quenched and Tempered Hot Rolled, Normalized, 275 Annealed 1.5 dia/4 dia/2 .020 .060 dia/4 dia/2 26 23 20 90 65 60 to 50 or 325 5 Quenched and Tempered 1.5 dia/4 dia/2 27 20 18 15 018 038 075 .102 SA 1025 .050 102 .13 85. 018 038 075 .102 S2 013 025 050 075 .025 .050 075 .102 S4. 180 025 .050 102 13 050 075 102 13 S5, 100 050 075 13 .18 .025 050 075 102 92 85 038 063 102 13 018 1025 .050 075 81 025 .050 075 102 .0007 .0015 .003 .004 M2, 360 .001 .002 .004 .005 .001 .002 .004 .005 M3. 275 .002 .003 .005 .006 .0007 .0015 .003 .004 M7 235 .0015 .0025 .004 .005 .0005 .001 .002 .003 220 .001 .002 .003 .004 110 025 1050 102 13 84 .050 075 .13 .15 72 .038 063 102 .13 1076 102 P20, M20 C-5 P20, M20 67 .025 060 See Section 15.6 for Tool Geometry. See Section 16 for Cutting Fluid Recommendations. *For standard length end mills, maximum axial depth can be up to 1.5x the cutter diameter. † Any premium HSS (T15, M33, M41-M47) or (S9, S10, S11, S12). 2-131