EXOMILL VC-10 Powdered Metal High Speed Steel List 660: Super High-Helix - Regular Length - Multiple Flute Semi-Roughing Cut Hardness Up to 20 HRC 20 to 30 HRC 30 to 40 HRC 40 to 50 HRC 1045Work Material1055Cast SteelCast Iron15-5 PH4140, 4340, 304,316, 410, 420,430 A16AL-4V17-4 PHH13 (HRC38)P20, D2Beryllium CopperH13 (HRC45)Inconel 718HastelloyWaspaloy Cutting Speed 80-100 SFM 50-65 SFM 35-45 SFM 20-30 SFM Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 1/4 1,500 3.2 1,000 2.1 630 1.3 400 0.7 5/16 1,250 3.2 750 1.9 500 1.3 315 0.7 3/8 1,000 3.5 600 2.1 450 1.6 280 0.8 7/16 850 3.6 500 2.1 355 1.5 224 0.8 1/2 710 3.8 450 2.4 315 1.7 200 0.8 5/8 560 3.8 375 2.5 250 1.7 160 0.9 3/4 450 3.8 280 2.4 224 1.9 140 0.8 7/8 400 4.0 236 2.4 180 1.8 112 0.8 1 315 3.5 200 2.2 160 1.8 100 0.8 Finish Cut Hardness Up to 20 HRC 20 to 30 HRC 30 to 40 HRC 40 to 50 HRC 1045Work Material1055Cast SteelCast Iron15-5 PH4140, 4340, 304,316, 410, 420,430 A16AL-4V17-4 PHH13 (HRC38)P20, D2Beryllium CopperH13 (HRC45)Inconel 718HastelloyWaspaloy Cutting Speed 80-100 SFM 50-65 SFM 35-45 SFM 20-30 SFM Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 1/4 1,800 7.6 1,120 3.8 630 2.1 400 1.1 5/16 1,400 8.4 900 4.3 500 2.4 315 1.2 3/8 1,250 8.8 800 4.6 400 2.3 280 1.3 7/16 1,000 9.0 630 4.7 355 2.7 224 1.4 1/2 900 8.5 560 4.5 315 2.5 200 1.4 5/8 710 8.0 450 4.5 250 2.5 160 1.5 3/4 630 7.1 400 4.3 200 2.1 140 1.5 7/8 500 7.5 315 4.7 180 2.7 112 1.6 1 450 6.8 280 4.2 160 2.4 100 1.4 1124 End Mill Technical WWW.OSGTOOL.COM