Carbide Micrograin Carbide End Mills Side Milling Hardness Up to 20 HRC 20 to 30 HRC 30 to 40 HRC 40 to 50 HRC Medium Carbon Pre-hardened Steels Pre-hardened Steels Work Material Steels Stainless Steels Stainless Steels Hardened Steels Mild Steels Die & Alloy Steels Die & Alloy Steels Cutting Speed 130 SFM 100 SFM 66 SFM 50 SFM Depth of Cut aa=1.5Dar= 0.1D aa=1.5Dar= 0.1D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 1/4 2,100 16 1,600 13 1,320 10 800 6 5/16 1,600 16 1,200 12 1,000 10 600 6 3/8 1,280 15 950 11 800 10 480 6 1/2 1,060 15 800 11 660 9 400 6 5/8 800 16 600 12 500 10 300 6 3/4 640 13 480 10 400 8 240 5 1 510 12 380 9 320 7 190 4 Slotting Hardness Up to 20 HRC 20 to 30 HRC 30 to 40 HRC 40 to 50 HRC Medium Carbon Pre-hardened Steels Pre-hardened Steels Work Material Steels Stainless Steels Stainless Steels Hardened Steels Mild Steels Die & Alloy Steels Die & Alloy Steels Cutting Speed 110 SFM 85 SFM 56 SFM 43 SFM up to 1/2” aa=1.0D Depth of Cut over 1/2” aa= 0.5D aa=0.5D aa=0.5D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min 1/4 2,100 6 1,600 5 1,320 4 800 2 5/16 1,600 6 1,200 5 1,000 4 600 2 3/8 1,280 6 950 5 800 4 480 2 1/2 1,060 6 800 5 660 4 400 2 5/8 800 6 600 5 500 4 300 2 3/4 640 5 480 4 400 3 240 2 1 510 4 380 3 320 3 190 2 WWW.OSGTOOL.COM End Mill Technical 1113