Multi-Carb | Speed & Feed Recommendations Ae Ap Hardness Series 66, 66CR Vc Diameter (inch) BRINELL Fractional Ap x D1 Ae x D1 (SFM) 3/16 1/4 3/8 1/2 5/8 3/4 1 720 RPM 14669 11002 7334 5501 4401 3667 2750 Profile 1 ≤ 0.05 Fz 0.0009 0.0012 0.0022 0.0030 0.0033 0.0036 0.0042 (576-864) CARBON STEEL Feed (IPM) 92 92 113 149 131 145 127 ≤ 175 1040, 1080, 1090, 10L50, 1140, 1212, 12L15, 1525, 1536 864 RPM 17603 13202 8801 6601 5281 4401 3300 Finish 2 ≤ 0.02 Fz 0.0007 0.0010 0.0018 0.0024 0.0026 0.0029 0.0034 (691-1037) Feed (IPM) 89 89 108 143 125 139 122 530 RPM 10798 8098 5399 4049 3239 2699 2025 Profile 1 ≤ 0.05 Fz 0.0006 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 (424-636) ALLOY STEEL Feed (IPM) 45 51 64 84 76 83 71 ≤ 275 4140, 4150, 4320, 5120, 5150, 8630, 86L20, 50100 636 RPM 12957 9718 6479 4859 3887 3239 2430 Finish 2 ≤ 0.02 Fz 0.0005 0.0007 0.0014 0.0018 0.0021 0.0022 0.0026 (509-763) Feed (IPM) 44 49 62 80 73 80 68 290 RPM 5908 4431 2954 2216 1772 1477 1108 Profile 1 ≤ 0.05 Fz 0.0004 0.0006 0.0012 0.0016 0.0018 0.0019 0.0022 (232-348) TOOL STEEL Feed (IPM) 17 19 25 32 29 31 27 ≤ 375 A2, D2, H13, L2, M2, P20, S7, T15, W2 348 RPM 7090 5317 3545 2659 2127 1772 1329 Finish 2 ≤ 0.02 Fz 0.0003 0.0005 0.0010 0.0013 0.0014 0.0015 0.0018 (278-418) Feed (IPM) 16 18 24 31 28 30 26 525 RPM 10696 8022 5348 4011 3209 2674 2006 Profile 1 ≤ 0.05 Fz 0.0008 0.0012 0.0022 0.0030 0.0033 0.0036 0.0042 (420-630) CAST IRON Feed (IPM) 60 67 82 108 95 106 93 ≤ 260 (LOW / MEDIUM ALLOY) Gray, Mallable, Ductile 630 RPM 12835 9626 6418 4813 3851 3209 2407 Finish 2 ≤ 0.02 Fz 0.0006 0.0010 0.0018 0.0024 0.0026 0.0029 0.0034 (504-756) Feed (IPM) 58 65 79 104 91 102 89 300 RPM 6112 4584 3056 2292 1834 1528 1146 Profile 1 ≤ 0.05 Fz 0.0002 0.0003 0.0006 0.0008 0.0008 0.0009 0.0011 (240-360) > 260 CAST IRON Feed (IPM) 9 10 12 16 14 15 13 ≤ 320 (DIFFICULT / HIGH ALLOY) Gray, Mallable, Ductile 360 RPM 7334 5501 3667 2750 2200 1834 1375 Finish 2 ≤ 0.02 Fz 0.0001 0.0002 0.0005 0.0006 0.0007 0.0007 0.0008 (288-432) Feed (IPM) 5 9 12 15 13 15 13 560 RPM 11409 8557 5705 4278 3423 2852 2139 Profile 1 ≤ 0.05 Fz 0.0006 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 (448-672) STAINLESS STEEL Feed (IPM) 48 54 68 89 80 88 75 ≤ 185 (FREE MACHINING) 303, 416, 420F, 430F 440F 672 RPM 13691 10268 6845 5134 4107 3423 2567 Finish 2 ≤ 0.02 Fz 0.0005 0.0007 0.0014 0.0018 0.0021 0.0022 0.0026 (538-806) Feed (IPM) 46 52 65 85 77 84 72 8 www.sgstool.com