306476 306477 306474 306475 305955 305958 306479 306478 1305 ap ap 0.1 – 1.0 1.2 – 2.0 2.5 – 4.0 5.0 – 6.0 8.0 10.0 12 Feed per tooth Feed per tooth Feed per tooth Feed per tooth Feed per tooth Feed per tooth Feed per tooth (mm) (mm) (mm) (mm) (mm) (mm) (mm) Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Material Strength Cutting speed N/mm2 (m/min) 3.1 3.2 8.1 8.2 8.3 X 36 Cr Mo 17 1100-1400 210 0.008 0.012 0.08 0.04 0.08 0.09 0.10 X 50 Ni Cr WV 1313 Toolox 44/ 45-55 HRC 180 0.004 0.006 0.03 0.06 0.07 0.08 0.09 Hardened steel Hardened steel 45-60 HRC 160 0.004 0.005 0.02 0.05 0.06 0.07 0.08 Hardened steel 60-70 HRC 120 0.003 0.005 0.018 0.045 0.055 0.065 0.075 workpiece N/mm2/ HRC Feed correction material factor 3.1/3.2 8.1 8.2 8.3 1100-1400 N/mm2 1.2 45-55 HRC 1.1 55-60 HRC 1.0 60-70 HRC 0.9 Correction factor for 30 6475 = 0.7 Mate ial group Material group ± 10% Copying milling fz for ae = 0.05 × d1 ap = 0.05 × d1 Recommended cutting data for Karnasch Rockwell cutter for hardened steel HHC/HSC 1.0 - 1.5 2.0 - 3.0 4.0 - 5.0 6.0 8.0 10.0 12.0 fz = mm/Z fz = mm/Z fz = mm/Z fz = mm/Z fz = mm/Z fz = mm/Z fz = mm/Z Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Z × 2 Material Strength Cutting speed N/mm2 (m/min) 1.1 1.2 1.3 2.1 2.2 2.5 2.6 3.1 3.2 4.1 4.2 4.3 7.1 7.2 7.3 8.10 36 Mn 6 < 450 350 0.009 0.012 0.040 0.055 0.070 0.080 0.010 ck 45 < 650 350 24 Cr Mo 5 < 850 350 21 Mu Cr 5 < 600 300 0.008 0.012 0.040 0.055 0.070 0.080 0.010 26 Cr Mo 4 < 950 260 34 Cr Al 6 < 1000 300 0.008 0.012 0.040 0.055 0.070 0.080 0.010 31 Cr Mo V9 > 1000 260 X 36 Cr Mo 17 < 700 360 0.008 0.012 0.040 0.055 0.070 0.080 0.010 S 18 -1-2-10 < 1400 200 X 12 Cr S 13 < 700 280 0.008 0.012 0.040 0.055 0.070 0.080 0.010 X 38 Cr 13 < 700 280 X 5 Cr Ni Mo 1712 2 < 700 280 GG 15 < 180 HB 500 0.008 0.012 0.040 0.055 0.070 0.080 0.010 GG 35 < 260 HB 500 GGG 50 370 Toolox 44 45-55 HRC 140 0.008 0.012 0.040 0.055 0.060 0.070 0.080 ae and ap = Correction factor for 30 6479 = 0.7 Material group ± 10% 0.2 0.06 0.12 0.18 0.25 0.30 0.35 Recommended cutting data for ball end mills HSC Vc = Cutting speed (m/min) Vf = Feed rate (mm/min) fz = Feed per tooth (mm) ae = Width of cut (mm) ap = Depth of cut (mm) n = rpm 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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