® Ap Series Diameter (D1) 51, 51CR, Ae Ae (inch) 51L, 51LC Vc Fractional Hardness Ae x D1 Ap x D1 (sfm) 1/4 3/8 1/2 5/8 3/4 1 Profile 720 RPM 11002 7334 5501 4401 3667 2750 ≤ 0.1 ≤1 Fz 0.0020 0.0035 0.0050 0.0055 0.0061 0.0071 CARBON STEELS (576-864) 1018, 1040, 1080, ≤ 275 Bhn Feed (ipm) 132 154 165 145 134 117 1090, 10L50, 1140, or Speed & Feed Recommendations 1212, 12L15, 1525, ≤ 28 HRc 915 RPM 13981 9321 6991 5592 4660 3495 1536 HSM ≤ 0.05 ≤2 Fz 0.0028 0.0053 0.0070 0.0077 0.0085 0.0100 (732-1098) Feed (ipm) 235 296 294 258 238 210 P 490 RPM 7487 4991 3744 2995 2496 1872 Profile ≤ 0.1 ≤1 Fz 0.0015 0.0029 0.0038 0.0042 0.0046 0.0054 ALLOY STEELS (392-588) 4140, 4150, 4320, ≤ 375 Bhn Feed (ipm) 67 87 85 75 69 61 5120, 5150, 8630, or 86L20, 50100 ≤ 40 HRc 620 RPM 9474 6316 4737 3789 3158 2368 HSM ≤ 0.05 ≤2 Fz 0.0021 0.0039 0.0052 0.0057 0.0062 0.0073 (496-744) Feed (ipm) 119 148 148 130 117 104 240 RPM 3667 2445 1834 1467 1222 917 Profile ≤ 0.1 ≤1 Fz 0.0012 0.0023 0.0030 0.0034 0.0037 0.0043 (192-288) TOOL STEELS ≤ 375 Bhn Feed (ipm) 26 34 33 30 27 24 |  H A2, D2, H13, L2, M2, or Series 51  P20, S7, T15, W2 ≤ 40 HRc 305 RPM 4660 3107 2330 1864 1553 1165 HSM ≤ 0.05 ≤2 Fz 0.0017 0.0032 0.0042 0.0046 0.0050 0.0059 (244-366) Feed (ipm) 48 60 59 51 47 41 510 RPM 7793 5195 3896 3117 2598 1948 Profile ≤ 0.1 ≤1 Fz 0.0015 0.0028 0.0038 0.0041 0.0045 0.0053 STAINLESS STEELS (459-561) (FREE MACHINING) ≤ 275 Bhn Feed (ipm) 70 87 89 77 70 62 303, 416, 420F, or 430F, 440F ≤ 28 HRc 650 RPM 9932 6621 4966 3973 3311 2483 HSM ≤ 0.05 ≤2 Fz 0.0021 0.0038 0.0051 0.0056 0.0061 0.0072 (585-715) Feed (ipm) 125 151 152 133 121 107 350 RPM 5348 3565 2674 2139 1783 1337 Profile ≤ 0.1 ≤1 Fz 0.0012 0.0023 0.0030 0.0033 0.0036 0.0042 (315-385) STAINLESS STEELS ≤ 275 Bhn Feed (ipm) 39 49 48 42 39 34 M (DIFFICULT) or 304, 304L, 316, 316L ≤ 28 HRc 450 RPM 6876 4584 3438 2750 2292 1719 HSM ≤ 0.05 ≤2 Fz 0.0017 0.0032 0.0042 0.0046 0.0050 0.0059 (405-495) Feed (ipm) 70 88 87 76 69 61 325 RPM 4966 3311 2483 1986 1655 1242 Profile ≤ 0.1 ≤1 Fz 0.0012 0.0023 0.0030 0.0033 0.0036 0.0042 STAINLESS STEELS (293-358) (PH) ≤ 325 Bhn Feed (ipm) 36 46 45 39 36 31 13-8 PH, 15-5 PH, or 17-4 PH, Custom 450 ≤ 35 HRc 410 RPM 6265 4177 3132 2506 2088 1566 HSM ≤ 0.05 ≤2 Fz 0.0017 0.0032 0.0042 0.0046 0.0050 0.0059 (369-451) Feed (ipm) 64 80 79 69 63 55 continued on next page 12 www.kyocera-sgstool.com