Multi-Carb | Speed & Feed Recommendations Ae Ap Hardness Series 66M, 66MCR Vc Diameter (mm) BRINELL Metric Ap x D1 Ae x D1 (m/min) 6 8 10 12 16 20 25 219 RPM 11609 8707 6965 5804 4353 3483 2786 Profile 1 ≤ 0.05 Fz 0.029 0.047 0.059 0.072 0.084 0.096 0.105 (175-263) CARBON STEEL Feed (mm/min) 2357 2864 2877 3761 3291 3678 3218 ≤ 175 1040, 1080, 1090, 10L50, 1140, 1212, 12L15, 1525, 1536 263 RPM 13931 10448 8358 6965 5224 4179 3343 Finish 2 ≤ 0.02 Fz 0.023 0.038 0.047 0.058 0.067 0.077 0.084 (210-315) Feed (mm/min) 2262 2750 2762 3611 3159 3531 3089 162 RPM 8587 6441 5152 4294 3220 2576 2061 Profile 1 ≤ 0.05 Fz 0.022 0.036 0.045 0.055 0.067 0.075 0.080 (130-194) ALLOY STEEL Feed (mm/min) 1322 1623 1623 2125 1942 2125 1814 ≤ 275 4140, 4150, 4320, 5120, 5150, 8630, 86L20, 50100 194 RPM 10305 7729 6183 5152 3864 3091 2473 Finish 2 ≤ 0.02 Fz 0.018 0.029 0.036 0.044 0.054 0.060 0.064 (156-233) Feed (mm/min) 1270 1558 1558 2040 1864 2040 1741 88 RPM 4665 3499 2799 2332 1749 1399 1120 Profile 1 ≤ 0.05 Fz 0.022 0.036 0.045 0.055 0.067 0.075 0.080 (70-106) TOOL STEEL Feed (mm/min) 718 882 882 1155 1055 1155 985 ≤ 375 A2, D2, H13, L2, M2, P20, S7, T15, W2 106 RPM 5598 4198 3359 2799 2099 1679 1343 Finish 2 ≤ 0.02 Fz 0.018 0.029 0.036 0.044 0.054 0.060 0.064 (84-127) Feed (mm/min) 690 846 846 1108 1013 1108 946 160 RPM 8481 6361 5089 4241 3181 2544 2036 Profile 1 ≤ 0.05 Fz 0.029 0.047 0.059 0.072 0.084 0.096 0.105 (128-192) CAST IRON Feed (mm/min) 1722 2093 2102 2748 2404 2687 2351 ≤ 260 (LOW / MEDIUM ALLOY) Gray, Mallable, Ductile 192 RPM 10178 7633 6107 5089 3817 3053 2443 Finish 2 ≤ 0.02 Fz 0.023 0.038 0.047 0.058 0.067 0.077 0.084 (154-230) Feed (mm/min) 1653 2009 2018 2638 2308 2579 2257 91 RPM 4824 3618 2894 2412 1809 1447 1158 Profile 1 ≤ 0.05 Fz 0.007 0.012 0.015 0.018 0.021 0.024 0.027 (73-109) > 260 CAST IRON Feed (mm/min) 240 309 308 397 347 376 340 ≤ 320 (DIFFICULT / HIGH ALLOY) Gray, Mallable, Ductile 109 RPM 5789 4341 3473 2894 2171 1737 1389 Finish 2 ≤ 0.02 Fz 0.006 0.010 0.012 0.015 0.017 0.019 0.021 (87-131) Feed (mm/min) 230 297 296 381 333 361 326 171 RPM 9064 6798 5439 4532 3399 2719 2175 Profile 1 ≤ 0.05 Fz 0.022 0.036 0.045 0.055 0.067 0.075 0.080 (137-205) STAINLESS STEEL Feed (mm/min) 1396 1713 1713 2243 2050 2243 1914 ≤ 185 (FREE MACHINING) 303, 416, 420F, 430F 440F 205 RPM 10877 8158 6526 5439 4079 3263 2611 Finish 2 ≤ 0.02 Fz 0.018 0.029 0.036 0.044 0.054 0.060 0.064 (164-246) Feed (mm/min) 1340 1645 1645 2154 1968 2154 1838 10 www.sgstool.com