Ap Series Diameter (D1) Ae Ae (mm) 33MCR Vc Metric Hardness Ae x D1 Ap x D1 (m/min) 3 6 8 10 12 16 20 Profile 168 RPM 17773 8886 6665 5332 4443 3332 2666 ≤ 0.5 ≤ 1.5 Fz 0.012 0.029 0.049 0.061 0.074 0.100 0.107 CARBON STEELS (134-201) 1018, 1040, 1080, 1090, ≤ 275 Bhn Feed (mm/min) 640 768 981 981 992 998 853 10L50, 1140, 1212, or 12L15, 1525, 1536 ≤ 28 HRc 134 RPM 14218 7109 5332 4265 3555 2666 2133 Slot 1 ≤1 Fz 0.012 0.029 0.049 0.061 0.074 0.100 0.107 (107-161) Feed (mm/min) 512 614 785 785 793 798 682 Speed & Feed Recommendations P 96 RPM 10179 5089 3817 3054 2545 1909 1527 Profile ≤ 0.5 ≤ 1.5 Fz 0.010 0.022 0.036 0.045 0.055 0.074 0.080 ALLOY STEELS (77-115) 4140, 4150, 4320, 5120, ≤ 375 Bhn Feed (mm/min) 293 330 415 415 421 425 366 5150, 8630, 86L20, or 50100 ≤ 40 HRc 76 RPM 8078 4039 3029 2424 2020 1515 1212 Slot 1 ≤1 Fz 0.010 0.022 0.036 0.045 0.055 0.074 0.080 (61-91) Feed (mm/min) 233 262 330 330 334 337 291 56 RPM 5978 2989 2242 1793 1495 1121 897 Profile ≤ 0.5 ≤ 1.5 Fz 0.007 0.017 0.030 0.037 0.043 0.059 0.064 (45-68) TOOL STEELS ≤ 375 Bhn Feed (mm/min) 129 151 201 201 194 198 172 H A2, D2, H13, L2, M2, or P20, S7, T15, W2 ≤ 40 HRc 44 RPM 4686 2343 1757 1406 1171 879 703 Slot 1 ≤1 Fz 0.007 0.017 0.030 0.037 0.043 0.059 0.064 (35-53) |  Feed (mm/min) 101 118 157 157 152 155 135 Series 33  136 RPM 14380 7190 5392 4314 3595 2696 2157 Profile ≤ 0.5 ≤ 1.5 Fz 0.008 0.026 0.045 0.056 0.067 0.090 0.096 CAST IRONS (109-163) (LOW & MEDIUM ≤ 220 Bhn Feed (mm/min) 362 569 725 725 725 725 621 ALLOY) or Gray, Malleable, ≤ 19 HRc 108 RPM 11471 5736 4302 3441 2868 2151 1721 Ductile Slot 1 ≤1 Fz 0.008 0.026 0.045 0.056 0.067 0.090 0.096 (87-130) Feed (mm/min) 289 454 578 578 578 578 496 K 104 RPM 10987 5493 4120 3296 2747 2060 1648 Profile ≤ 0.5 ≤ 1.5 Fz 0.007 0.019 0.034 0.043 0.050 0.067 0.072 CAST IRONS (83-124) (HIGH ALLOY) ≤ 260 Bhn Feed (mm/min) 237 316 422 422 415 411 356 Gray, Malleable, or Ductile ≤ 26 HRc 82 RPM 8725 4362 3272 2617 2181 1636 1309 Slot 1 ≤1 Fz 0.007 0.019 0.034 0.043 0.050 0.067 0.072 (66-99) Feed (mm/min) 188 251 335 335 330 327 283 149 RPM 15834 7917 5938 4750 3958 2969 2375 Profile ≤ 0.5 ≤ 1.5 Fz 0.009 0.024 0.041 0.051 0.060 0.079 0.085 STAINLESS STEELS (119-179) (FREE MACHINING) ≤ 275 Bhn Feed (mm/min) 433 570 722 722 712 707 608 M 303, 416, 420F, or 430F, 440F ≤ 28 HRc 119 RPM 12602 6301 4726 3781 3151 2363 1890 Slot 1 ≤1 Fz 0.009 0.024 0.041 0.051 0.060 0.079 0.085 (95-143) Feed (mm/min) 345 454 575 575 567 563 484 continued on next page 10 www.kyocera-sgstool.com