HY-PRO® CARB Performance Sub-Micrograin Carbide End Mills List HP460: (continued) Slotting (Fractional) Hardness Up to 20 HRC 20 to 35 HRC 35 to 45 HRC 45 to 55 HRC Work Medium Carbon SteelsMaterialMild SteelsPre-hardened SteelsStainless SteelsDie & Alloy SteelsPre-hardened SteelsStainless SteelsDie & Alloy SteelsHardened Steels CuttingSpeed 150 SFM 102 SFM 66 SFM 52 SFM Depthof Cut aaD<1/21.0D1/2≤D0.5D aa=0.5D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 1/4 2,448 9.5 1,632 5.6 1,080 2.4 816 1 5/16 1,836 9.5 1,224 5.6 816 2.4 612 1 3/8 1,428 10.9 972 5.6 648 2.4 492 1 1/2 1,224 11.8 816 6.1 540 2.4 408 1 5/8 912 12.7 612 6.1 408 2.4 312 1 3/4 744 13.2 492 6.6 324 2.4 240 1 1 600 11.3 384 6.1 252 2.4 192 1 Slotting (Metric) Hardness Up to 20 HRC 20 to 35 HRC 35 to 45 HRC 45 to 55 HRC Work Material Medium Carbon SteelsMild Steels Pre-hardened SteelsStainless SteelsDie & Alloy SteelsPre-hardened SteelsStainless SteelsDie & Alloy SteelsHardened Steels Cutting Speed 150 SFM 102 SFM 66 SFM 52 SFM aaDepth of CutD<1/21.0D aa=0.5D 1/2≤D 0.5D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 3 4,920 4.7 3,600 2.8 2,280 1.2 1,680 0.5 4 3,720 6.1 2,760 3.8 1,680 1.7 1,320 0.6 5 3,000 8.0 2,160 4.7 1,320 2.0 1,080 0.7 6 2,448 9.4 1,632 5.7 1,080 2.4 816 0.9 8 1,836 9.4 1,224 5.7 816 2.4 612 0.9 10 1,428 10.9 972 5.7 648 2.4 492 0.9 12 1,224 11.8 816 6.1 540 2.4 408 0.9 16 912 12.8 612 6.1 408 2.4 312 0.9 20 744 13.2 492 6.6 324 2.4 240 0.9 25 600 11.3 384 6.1 252 2.4 192 0.9 1084 End Mill Technical WWW.OSGTOOL.COM