FRACTIONAL Z-Carb Ap Series Diameter (D1) Ae Ae (inch) Z1, Z1B, Z16CR Vc Fractional Hardness Ae x D1 Ap x D1 (sfm) 1/8 1/4 3/8 1/2 5/8 3/4 1 Profile 555 RPM 16961 8480 5654 4240 3392 2827 2120 ≤ 0.5 ≤ 1.5 Fz 0.0004 0.0010 0.0019 0.0025 0.0031 0.0032 0.0035 CARBON STEELS (444-666) 1018, 1040, 1080, ≤ 275 Bhn Feed (ipm) 25.8 33.9 43.0 42.4 42.1 36.5 29.7 1090, 10L50, 1140, or 1212, 12L15, 1525, ≤ 28 HRc 440 RPM 13446 6723 4482 3362 2689 2241 1681 1536 Slot 1 ≤1 Fz 0.0004 0.0010 0.0019 0.0025 0.0031 0.0032 0.0035 (352-528) Feed (ipm) 20.4 26.9 34.1 33.6 33.3 29.0 23.5 P 315 RPM 9626 4813 3209 2407 1925 1604 1203 Profile ≤ 0.5 ≤ 1.5 Fz 0.0003 0.0008 0.0014 0.0019 0.0024 0.0025 0.0027 ALLOY STEELS (252-378) 4140, 4150, 4320, ≤ 375 Bhn Feed (ipm) 10.8 15.4 18.0 18.3 18.5 16.0 13.0 5120, 5150, 8630, or 86L20, 50100 ≤ 40 HRc 250 RPM 7640 3820 2547 1910 1528 1273 955 Slot 1 ≤1 Fz 0.0003 0.0008 0.0014 0.0019 0.0024 0.0025 0.0027 (200-300) Feed (ipm) 8.6 12.2 14.3 14.5 14.7 12.7 10.3 185 RPM 5654 2827 1885 1413 1131 942 707 Profile ≤ 0.5 ≤ 1.5 Fz 0.0002 0.0005 0.0010 0.0013 0.0016 0.0017 0.0018 (148-222) TOOL STEELS ≤ 375 Bhn Feed (ipm) 4.5 5.7 7.5 7.3 7.2 6.4 5.1 H A2, D2, H13, L2, M2, or P20, S7, T15, W2 ≤ 40 HRc 145 RPM 4431 2216 1477 1108 886 739 554 Slot 1 ≤1 Fz 0.0002 0.0005 0.0010 0.0013 0.0016 0.0017 0.0018 (116-174) Feed (ipm) 3.5 4.4 5.9 5.8 5.7 5.0 4.0 445 RPM 13599 6800 4533 3400 2720 2267 1700 Profile ≤ 0.5 ≤ 1.5 Fz 0.0004 0.0010 0.0018 0.0024 0.0030 0.0031 0.0034 CAST IRONS (356-534) (LOW & MEDIUM ≤ 220 Bhn Feed (ipm) 19.0 27.2 32.6 32.6 32.6 28.1 23.1 ALLOY) or Gray, Malleable, ≤ 19 HRc 355 RPM 10849 5424 3616 2712 2170 1808 1356 Ductile Slot 1 ≤1 Fz 0.0004 0.0010 0.0018 0.0024 0.0030 0.0031 0.0034 (284-426) Feed (ipm) 15.2 21.7 26.0 26.0 26.0 22.4 18.4 K 340 RPM 10390 5195 3463 2598 2078 1732 1299 Profile ≤ 0.5 ≤ 1.5 Fz 0.0003 0.0007 0.0014 0.0018 0.0023 0.0024 0.0025 CAST IRONS (272-408) (HIGH ALLOY) ≤ 260 Bhn Feed (ipm) 12.5 14.5 19.4 18.7 19.1 16.6 13.0 Gray, Malleable, or Ductile ≤ 26 HRc 270 RPM 8251 4126 2750 2063 1650 1375 1031 Slot 1 ≤1 Fz 0.0003 0.0007 0.0014 0.0018 0.0023 0.0024 0.0025 (216-324) Feed (ipm) 9.9 11.6 15.4 14.9 15.2 13.2 10.3 490 RPM 14974 7487 4991 3744 2995 2496 1872 Profile ≤ 0.5 ≤ 1.5 Fz 0.0003 0.0007 0.0014 0.0018 0.0023 0.0024 0.0025 STAINLESS STEELS (392-588) (FREE MACHINING) ≤ 275 Bhn Feed (ipm) 18.0 21.0 28.0 27.0 27.6 24.0 18.7 M 303, 416, 420F, or 430F, 440F ≤ 28 HRc 390 RPM 11918 5959 3973 2980 2384 1986 1490 Slot 1 ≤1 Fz 0.0003 0.0007 0.0014 0.0018 0.0023 0.0024 0.0025 (312-468) Feed (ipm) 14.3 16.7 22.2 21.5 21.9 19.1 14.9 continued on next page 48 END MILLS wwwE.kNyDoMceILraLS-sgstool.com