METRIC 2 Flute: Square, Ball Ap Diameter (D1) M2M, M2MB Ae Ae (mm) 1.5xD Vc Metric Hardness Ae x D1 Ap x D1 (m/min) 0.1 0.5 1 1.5 2 2.5 3 111 RPM 353837 70767 35384 23589 17692 14153 11795 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00043 0.00216 0.00432 0.00648 0.00865 0.01081 0.01297 CARBON STEELS (89-134) ≤ 275 Bhn Feed (mm/min) 306 306 306 306 306 306 306 1018, 1040, 1080, 1090, or 10L50, 1140, 1212, 88 RPM 281131 56226 28113 18742 14057 11245 9371 ≤ 28 HRc Slot 12L15, 1525, 1536 1 ≤ .20 ≤ .50 Fz 0.00043 0.00216 0.00432 0.00648 0.00865 0.01081 0.01297 (71-106) Feed (mm/min) 243 243 243 243 243 243 243 P 64 RPM 203577 40715 20358 13572 10179 8143 6786 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00038 0.00192 0.00384 0.00576 0.00769 0.00961 0.01153 ALLOY STEELS (51-77) ≤ 375 Bhn Feed (mm/min) 156 156 156 156 156 156 156 4140, 4150, 4320, 5120, or 5150, 8630, 86L20, 50 RPM 159954 31991 15995 10664 7998 6398 5332 ≤ 40 HRc Slot 50100 1 ≤ .20 ≤ .50 Fz 0.00038 0.00192 0.00384 0.00576 0.00769 0.00961 0.01153 (40-60) Feed (mm/min) 123 123 123 123 123 123 123 53 RPM 169648 33930 16965 11310 8482 6786 5655 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00032 0.00160 0.00320 0.00480 0.00640 0.00800 0.00962 (43-64) TOOL STEELS ≤ 375 Bhn Feed (mm/min) 109 109 109 109 109 109 109 H A2, D2, H13, L2, M2, or P20, S7, T15, W2 ≤ 40 HRc 43 RPM 135718 27144 13572 9048 6786 5429 4524 Slot 1 ≤ .20 ≤ .50 Fz 0.00032 0.00160 0.00320 0.00480 0.00640 0.00800 0.00962 (34-51) Feed (mm/min) 87 87 87 87 87 87 87 93 RPM 295672 59134 29567 19711 14784 11827 9856 Profile CAST IRONS ≤ .30 ≤ .50 ≤1 Fz 0.00043 0.00217 0.00433 0.00650 0.00866 0.01083 0.01301 (74-112) (LOW & MEDIUM ≤ 220 Bhn Feed (mm/min) 256 256 256 256 256 256 256 K ALLOY) or Gray, Malleable, ≤ 19 HRc 75 RPM 237507 47501 23751 15834 11875 9500 7917 Slot Ductile 1 ≤ .20 ≤ .50 Fz 0.00043 0.00217 0.00433 0.00650 0.00866 0.01083 0.01301 (60-90) Feed (mm/min) 206 206 206 206 206 206 206 104 RPM 329602 65920 32960 21973 16480 13184 10987 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00043 0.00216 0.00432 0.00648 0.00865 0.01081 0.01295 STAINLESS STEELS (83-124) ≤ 275 Bhn Feed (mm/min) 285 285 285 285 285 285 285 (FREE MACHINING) or 303, 416, 420F, 430F, 82 RPM 261742 52348 26174 17449 13087 10470 8725 ≤ 28 HRc Slot 440F 1 ≤ .20 ≤ .50 Fz 0.00043 0.00216 0.00432 0.00648 0.00865 0.01081 0.01295 (66-99) Feed (mm/min) 226 226 226 226 226 226 226 72 RPM 227813 45563 22781 15188 11391 9113 7594 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00038 0.00192 0.00385 0.00577 0.00769 0.00961 0.01154 (57-86) STAINLESS STEELS ≤ 275 Bhn Feed (mm/min) 175 175 175 175 175 175 175 M (DIFFICULT) or 304, 304L, 316, 316L ≤ 28 HRc 56 RPM 179342 35868 17934 11956 8967 7174 5978 Slot 1 ≤ .20 ≤ .50 Fz 0.00038 0.00192 0.00385 0.00577 0.00769 0.00961 0.01154 (45-68) Feed (mm/min) 138 138 138 138 138 138 138 66 RPM 208425 41685 20842 13895 10421 8337 6947 Profile ≤ .30 ≤ .50 ≤1 Fz 0.00027 0.00136 0.00272 0.00408 0.00544 0.00680 0.00819 STAINLESS STEELS (52-79) ≤ 325 Bhn Feed (mm/min) 113 113 113 113 113 113 113 (PH) or 13-8 PH, 15-5PH, 52 RPM 164801 32960 16480 10987 8240 6592 5493 ≤ 35 HRc Slot 17-4 PH, CUSTOM 450 1 ≤ .20 ≤ .50 Fz 0.00027 0.00136 0.00272 0.00408 0.00544 0.00680 0.00819 (41-62) Feed (mm/min) 90 90 90 90 90 90 90 continued on next page 46 END MILLS END MILLS www.ksptmicrotools.com