Ap Series Diameter (D1) Z1PCR, Z1PLC, Ae Ae (inch) Z1PLB Vc Fractional Hardness Ae x D1 Ap x D1 (SFM) 1/64 1/8 1/4 3/8 1/2 5/8 3/4 1 Profile 555 RPM 135904 16961 8480 5654 4240 3392 2827 2120 CARBON STEELS ≤ 0.5 ≤ 1.5 (444-666) Fz 0.00005 0.00046 0.0012 0.0023 0.0031 0.0034 0.0037 0.0043 1018, 1040, 1080, ≤ 275 Bhn Feed (ipm) 27.2 31.2 40.7 52.0 52.6 46.1 41.8 36.5 1090, 10L50, 1140, or 440 RPM 107744 13446 6723 4482 3362 2689 2241 1681 Speed & Feed Recommendations 1212, 12L15, 1525, ≤ 28 HRc Slot 1536 1 ≤1 Fz 0.00005 0.00046 0.0012 0.0023 0.0031 0.0034 0.0037 0.0043 (352-528) Feed (ipm) 21.5 24.7 32.3 41.2 41.7 36.6 33.2 28.9 P 315 RPM 77135 9626 4813 3209 2407 1925 1604 1203 Profile ≤ 0.5 ≤ 1.5 (252-378) Fz 0.00004 0.00034 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 ALLOY STEELS ≤ 375 Bhn Feed (ipm) 12.3 13.1 17.3 21.8 22.1 20.0 18.0 15.4 4140, 4150, 4320, or 5120, 5150, 8630, ≤ 40 HRc 250 RPM 61218 7640 3820 2547 1910 1528 1273 955 86L20, 50100 Slot 1 ≤1 (200-300) Fz 0.00004 0.00034 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 Feed (ipm) 9.8 10.4 13.8 17.3 17.6 15.9 14.3 12.2 Profile 185 RPM 45301 5654 2827 1885 1413 1131 942 707 ≤ 0.5 ≤ 1.5 (148-222) Fz 0.00003 0.00028 0.0007 0.0014 0.0018 0.0020 0.0022 0.0026 TOOL STEELS ≤ 375 Bhn Feed (ipm) 5.4 6.3 7.9 10.6 10.2 9.0 8.3 7.3 H A2, D2, H13, L2, M2, or 145 RPM 35506 4431 2216 1477 1108 886 739 554 P20, S7, T15, W2 ≤ 40 HRc Slot 1 ≤1 (116-174) Fz 0.00003 0.00028 0.0007 0.0014 0.0018 0.0020 0.0022 0.0026 | Feed (ipm) 4.3 5.0 6.2 8.3 8.0 7.1 6.5 5.8 Z-Carb-AP Profile 445 RPM 108968 13599 6800 4533 3400 2720 2267 1700 CAST IRONS ≤ 0.5 ≤ 1.5 (356-534) Fz 0.00005 0.00042 0.0011 0.0021 0.0028 0.0031 0.0034 0.0039 (LOW & MEDIUM ≤ 220 Bhn Feed (ipm) 21.8 22.8 29.9 38.1 38.1 33.7 30.8 26.5 ALLOY) or 355 RPM 86929 10849 5424 3616 2712 2170 1808 1356 Gray, Malleable, ≤ 19 HRc Slot Ductile 1 ≤1 Fz 0.00005 0.00042 0.0011 0.0021 0.0028 0.0031 0.0034 0.0039 (284-426) Feed (ipm) 17.4 18.2 23.9 30.4 30.4 26.9 24.6 21.2 K 340 RPM 83256 10390 5195 3463 2598 2078 1732 1299 Profile ≤ 0.5 ≤ 1.5 (272-408) Fz 0.00004 0.00031 0.0008 0.0016 0.0021 0.0023 0.0025 0.0029 CAST IRONS ≤ 260 Bhn Feed (ipm) 13.3 12.9 17.5 22.2 21.8 19.1 17.3 15.1 (HIGH ALLOY) or Gray, Malleable, ≤ 26 HRc 270 RPM 66115 8251 4126 2750 2063 1650 1375 1031 Ductile Slot 1 ≤1 (216-324) Fz 0.00004 0.00031 0.0008 0.0016 0.0021 0.0023 0.0025 0.0029 Feed (ipm) 10.6 10.2 13.9 17.6 17.3 15.2 13.8 12.0 Profile 490 RPM 119987 14974 7487 4991 3744 2995 2496 1872 ≤ 0.5 ≤ 1.5 (392-588) Fz 0.00004 0.00034 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 STAINLESS STEELS ≤ 275 Bhn Feed (ipm) 19.2 20.4 27.0 33.9 34.4 31.1 28.0 24.0 (FREE MACHINING) or 303, 416, 420F, ≤ 28 HRc 390 RPM 95500 11918 5959 3973 2980 2384 1986 1490 430F, 440F Slot 1 ≤1 (312-468) Fz 0.00004 0.00034 0.0009 0.0017 0.0023 0.0026 0.0028 0.0032 M Feed (ipm) 15.3 16.2 21.5 27.0 27.4 24.8 22.2 19.1 Profile 340 RPM 83256 10390 5195 3463 2598 2078 1732 1299 ≤ 0.5 ≤ 1.5 (272-408) Fz 0.00003 0.00027 0.0007 0.0014 0.0018 0.0020 0.0022 0.0025 STAINLESS STEELS ≤ 275 Bhn Feed (ipm) 10.0 11.2 14.5 19.4 18.7 16.6 15.2 13.0 (DIFFICULT) or 270 RPM 66115 8251 4126 2750 2063 1650 1375 1031 304, 304L,316, 316L ≤ 28 HRc Slot 1 ≤1 (216-324) Fz 0.00003 0.00027 0.0007 0.0014 0.0018 0.0020 0.0022 0.0025 Feed (ipm) 7.9 8.9 11.6 15.4 14.9 13.2 12.1 10.3 continued on next page 12 www.sgstool.com