
Step 3 - Select the cutting speed Low-Carbon (<0,3% C) and Free-Machining Steel m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 180 440 475 590 1440 1560 KCU10B 165 310 395 540 1020 1300 KCP05B/KCP05/KCPK05 180 435 500 590 1430 1640 P0/P1 KCP10B/KCP10 180 395 440 590 1300 1440 KCP25C 150 330 430 490 1080 1410 KCP30B/KCP30/KCP40/KCP40B 115 210 235 380 690 770 Medium- and High-Carbon Steels (>0,3% C) m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 190 270 395 620 890 1300 KCU10B 155 220 250 510 720 820 KCP05B/KCP05/KCPK05 180 240 400 590 790 1310 P2 KCP10B/KCP10 180 265 350 590 870 1150 KCP25C 150 235 385 490 770 1260 KCP30B/KCP30/KCP40/KCP40B 115 150 240 380 490 790 Alloy Steels and Tool Steels; <330 HB; <35 HRC m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 180 210 275 590 690 900 KCU10B 150 170 250 490 560 820 KCP05B/KCP05/KCPK05 180 205 275 590 670 900 P3 KCP10B/KCP10 160 190 245 520 620 800 KCP25C 150 185 275 490 610 900 KCP30B/KCP30/KCP40/KCP40B 115 120 160 380 390 520 Alloy Steels and Tool Steels; 350–450 HB; 35–48 HRC m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 90 210 215 300 690 710 KCU10B 85 120 195 280 390 640 KCP05B/KCP05/KCPK05 90 155 215 300 510 710 P4 KCP10B/KCP10 90 145 195 300 480 640 KCP25C 75 125 215 250 410 710 KCP30B/KCP30/KCP40/KCP40B 50 95 135 160 310 440 Ferritic, Martensitic, and PH Stainless Steels; <330 HB; <35 HRC m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 150 250 310 490 820 1020 KCU10B 130 220 290 430 720 950 KCP05B/KCP05/KCPK05 150 230 270 490 750 890 P5 KCP10B/KCP10 150 215 300 490 710 980 KCP25C 130 235 325 430 770 1070 KCP30B/KCP30/KCP40/KCP40B 110 135 150 360 440 490 Ferritic, Martensitic, and PH Stainless Steels; 350–450 HB; 35–48 HRC m/min SFM material group grade MIN START MAX MIN START MAX KTP10/KT315 140 200 295 460 660 970 KCU10B 115 165 250 380 540 820 KCP05B/KCP05/KCPK05 140 200 300 460 660 980 P6 KCP10B/KCP10 120 180 270 390 590 890 KCP25C 115 180 265 380 590 870 KCP30B/KCP30/KCP40/KCP40B 90 105 140 300 340 460 7