Series Diameter (D1) 135 3D Vc (mm) Metric Hardness (m/min) 1.5 3 6 8 10 12 16 20 ≤ 175 Bhn 117 RPM 24882 12441 6220 4665 3732 3110 2333 1866 or Fr 0.047 0.094 0.189 0.252 0.315 0.378 0.504 0.630 ≤ 7 HRc (94-141) Feed (mm/min) 1175 1175 1175 1175 1175 1175 1175 1175 CARBON STEELS ≤ 275 Bhn 107 RPM 22620 11310 5655 4241 3393 2827 2121 1696 1018, 1040, 1080, 1090, 10L50, or Fr 0.043 0.086 0.172 0.229 0.286 0.343 0.457 0.572 1140, 1212, 12L15, 1525, 1536 ≤ 28 HRc (85-128) Feed (mm/min) 970 970 970 970 970 970 970 970 Speed & Feed Recommendations ≤ 475 Bhn 61 RPM 12926 6463 3231 2424 1939 1616 1212 969 or Fr 0.036 0.071 0.142 0.190 0.237 0.285 0.380 0.475 ≤ 45 HRc (49-73) Feed (mm/min) 460 460 460 460 460 460 460 460 P ≤ 275 Bhn 91 RPM 19388 9694 4847 3635 2908 2424 1818 1454 or Fr 0.036 0.071 0.142 0.190 0.237 0.285 0.380 0.475 ≤ 28 HRc (73-110) Feed (mm/min) 690 690 690 690 690 690 690 690 ALLOY STEELS ≤ 375 Bhn 56 RPM 11956 5978 2989 2242 1793 1495 1121 897 4140, 4150, 4320, 5120, 5150, or Fr 0.031 0.061 0.122 0.163 0.204 0.244 0.326 0.407 8630, 86L20, 50100 ≤ 40 HRc (45-68) Feed (mm/min) 365 365 365 365 365 365 365 365 ≤ 450 Bhn 40 RPM 8402 4201 2100 1575 1260 1050 788 630 or Fr 0.021 0.042 0.083 0.111 0.139 0.167 0.222 0.278 ≤ 48 HRc (32-48) Feed (mm/min) 175 175 175 175 175 175 175 175 ≤ 200 Bhn 40 RPM 8402 4201 2100 1575 1260 1050 788 630 or Fr 0.032 0.063 0.126 0.168 0.210 0.252 0.336 0.421 | ≤ 13 HRc (32-48) Feed (mm/min) 265 265 265 265 265 265 265 265 Series 135 3xD TOOL STEELS ≤ 375 Bhn 27 RPM 5816 2908 1454 1091 872 727 545 436 H A2, D2, H13, L2, M2, or Fr 0.014 0.028 0.055 0.073 0.092 0.110 0.147 0.183 P20, S7, T15, W2 ≤ 40 HRc (22-33) Feed (mm/min) 80 80 80 80 80 80 80 80 ≤ 475 Bhn 23 RPM 4847 2424 1212 909 727 606 454 364 or Fr 0.009 0.019 0.037 0.050 0.062 0.074 0.099 0.124 ≤ 50 HRc (18-27) Feed (mm/min) 45 45 45 45 45 45 45 45 ≤ 220 Bhn 98 RPM 20681 10340 5170 3878 3102 2585 1939 1551 or Fr 0.055 0.110 0.220 0.293 0.366 0.439 0.585 0.732 CAST IRONS ≤ 19 HRc (78-117) Feed (mm/min) 1135 1135 1135 1135 1135 1135 1135 1135 K Gray, Malleable, Ductile ≤ 260 Bhn 87 RPM 18419 9209 4605 3454 2763 2302 1727 1381 or Fr 0.055 0.110 0.219 0.292 0.366 0.439 0.585 0.731 ≤ 26 HRc (69-104) Feed (mm/min) 1010 1010 1010 1010 1010 1010 1010 1010 ≤ 185 Bhn 84 RPM 17773 8886 4443 3332 2666 2222 1666 1333 or Fr 0.031 0.061 0.123 0.164 0.204 0.245 0.327 0.409 STAINLESS STEELS ≤ 9 HRc (67-101) Feed (mm/min) 545 545 545 545 545 545 545 545 (FREE MACHINING) 303, 416, 420F, 430F, 440F ≤ 275 Bhn 52 RPM 10987 5493 2747 2060 1648 1373 1030 824 or Fr 0.024 0.047 0.095 0.126 0.158 0.189 0.252 0.316 ≤ 28 HRc (41-62) Feed (mm/min) 260 260 260 260 260 260 260 260 M ≤ 275 Bhn 27 RPM 5816 2908 1454 1091 872 727 545 436 or Fr 0.023 0.046 0.093 0.124 0.155 0.186 0.248 0.309 STAINLESS STEELS ≤ 28 HRc (22-33) (DIFFICULT) Feed (mm/min) 135 135 135 135 135 135 135 135 304, 316, 321, 13-8 PH, 20 RPM 4201 2100 1050 788 630 525 394 315 15-5PH, 17-4 PH, Custom 450 ≤ 375 Bhn or Fr 0.020 0.040 0.081 0.108 0.135 0.162 0.216 0.270 ≤ 40 HRc (16-24) Feed (mm/min) 85 85 85 85 85 85 85 85 (continued on next page) 20 www.kyocera-sgstool.com