HY-PRO® CARB Performance Sub-Micrograin Carbide End Mills List HP421BN, HP441BN: (continued) High Speed Light Milling (Fractional) Hardness Up to 20 HRC 20 to 30 HRC 30 to 38 HRC 38 to 45 HRC 45 to 55 HRC 55 to 60 HRC Hardened Steels Hardened Steels WorkMaterial Mild SteelsCarbon Steels Alloy SteelsTool SteelsTi Alloys (Annealed)Pre-hardenedSteelsTi Alloys(Solution Treated andPre-hardenedSteelsStainless SteelsInconelHardened SteelsHardened Steels Aged) Ni Based Alloys CuttingSpeed 985 SFM 855 SFM 740 SFM 590 SFM 590 SFM 400 SFM Depthof Cut aaar==00..0052DD aa arD < 5/320.02D0.05D5/32 < D0.13”0.05D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/minSpeedRPM Feedin/min SpeedRPM Feedin/min 1/16 39,250 126.0 35,500 110.2 35,200 98.4 33,600 88.6 23,300 59.1 17,750 39.4 3/32 27,450 137.8 21,900 111.8 21,400 98.8 20,500 89.0 14,850 61.4 11,000 39.4 1/8 20,050 140.2 16,150 117.3 15,650 101.2 14,850 90.9 11,000 65.0 8,250 40.2 5/32 18,150 144.9 15,550 132.3 15,050 107.5 13,600 95.7 11,000 73.6 7,950 42.9 3/16 16,000 158.3 14,900 153.9 13,900 111.8 11,400 91.3 10,150 81.1 7,550 45.7 1/4 13,850 174.4 12,350 155.5 10,650 100.0 8,750 81.5 8,750 81.5 6,050 41.7 5/16 11,650 146.1 10,150 128.0 9,050 83.9 7,250 67.7 7,250 67.7 5,000 35.4 3/8 9,800 122.0 8,500 105.9 7,400 69.3 5,900 55.1 5,900 55.1 4,100 28.7 7/16 8,250 102.8 7,150 88.6 6,200 57.9 4,950 45.7 4,950 45.7 3,400 24.0 1/2 7,250 90.2 6,250 77.6 5,450 50.4 4,300 40.2 4,300 40.2 3,000 20.9 5/8 6,050 75.6 5,200 63.8 4,500 41.7 3,600 33.9 3,600 33.9 2,450 17.3 3/4 5,050 62.6 4,350 54.7 3,750 35.4 3,000 28.3 3,000 28.3 2,100 14.6 1 3,765 46.8 3,270 41.1 2,830 26.7 2,250 21.2 2,250 21.2 1,530 10.6 Increase feeds 40% to 50% for Series HP441BN. High Speed Light Milling (Metric) Hardness Up to 20 HRC 20 to 30 HRC 30 to 38 HRC 38 to 45 HRC 45 to 55 HRC 55 to 60 HRC Hardened Steels Hardened Steels WorkMaterial Mild SteelsCarbon Steels Alloy SteelsTool SteelsTi Alloys (Annealed)Pre-hardenedSteelsTi Alloys(Solution Treated andPre-hardenedSteelsStainless SteelsInconelHardened SteelsHardened Steels Aged) Ni Based Alloys CuttingSpeed 985 SFM 855 SFM 740 SFM 590 SFM 590 SFM 400 SFM Depthof Cut aaar==00..0052DD aa arD < 5/320.02D0.05D5/32 < D0.13”0.05D Mill Dia. SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/min SpeedRPM Feedin/minSpeedRPM Feedin/min SpeedRPM Feedin/min 1 50,000 110 50,000 110 50,000 98 47,500 89 32,000 57 25,000 39 2 31,780 137 25,385 110 24,890 98 23,875 89 17,225 61 12,690 39 3 20,475 139 16,325 114 15,825 100 15,150 90 11,000 63 8,355 40 4 18,085 145 15,525 133 15,025 108 13,555 96 11,000 74 7,960 43 5 15,415 162 14,755 161 13,600 113 10,755 90 9,915 83 7,435 47 6 14,380 181 12,880 162 11,050 104 9,080 85 9,080 85 6,305 43 8 11,600 145 10,100 127 9,025 83 7,215 68 7,215 68 5,000 35 10 9,250 115 8,025 99 6,950 65 5,540 52 5,540 52 3,840 27 12 7,540 94 6,510 81 5,650 52 4,500 41 4,500 41 3,125 22 14 6,800 85 5,900 73 5,100 47 4,050 38 4,050 38 2,800 20 16 6,000 75 5,190 64 4,485 42 3,575 34 3,575 34 2,465 17 18 5,300 65 4,550 57 3,950 37 3,150 30 3,150 30 2,200 16 20 4,890 61 4,215 53 3,650 34 2,925 28 2,925 28 2,010 14 22 4,255 53 3,710 46 3,190 30 2,550 24 2,550 24 1,755 12 25 3,740 46 3,250 41 2,805 26 2,215 21 2,215 21 1,525 11 Increase feeds 40% to 50% for Series HP441BN. 1094 End Mill Technical WWW.OSGTOOL.COM