HSS-CO End Mills 2 Flute Standard 2 Flute HSS-Co: (Continued) Slotting Hardness 30 to 40 HRC 40 to 50 HRC – High Tensile SteelsWork MaterialTool SteelsMedium Strength Stainless Steels andTitanium AlloysHeat ResistantHigh Strength StainlessSteels and Titanium AlloysAluminumAlloy AluminumPlasticsWoods Cutting Speed 80-150 SFM 16-32 SFM 150-165 SFM Mill Dia. SpeedRPM IPT Feed Speedin/minRPM IPT Feed Speedin/minRPM IPT Feedin/min 1/64 10,000 0.00002 0.3 6,300 0.00001 0.1 20,000 0.00003 2.4 1/32 5,000 0.00004 0.4 3,150 0.00003 0.1 20,000 0.00008 3.0 3/64 3,150 0.00009 0.5 2,000 0.00006 0.3 20,000 0.00014 5.5 1/16 2,500 0.00012 0.6 1,600 0.00008 0.3 20,000 0.00020 8.0 5/64 2,000 0.00017 0.6 1,250 0.00011 0.3 16,000 0.00028 9.0 3/32 1,600 0.00024 0.8 1,000 0.00016 0.4 12,500 0.00038 9.4 7/64 1,400 0.00028 0.8 900 0.00020 0.4 11,200 0.00043 9.5 1/8 1,250 0.00034 0.9 800 0.00024 0.4 10,000 0.00050 10.0 9/64 1,120 0.00040 0.9 710 0.00028 0.4 9,000 0.00060 10.8 5/32 1,000 0.00048 1.0 630 0.00034 0.4 8,000 0.00071 11.4 11/64 900 0.00056 1.0 560 0.00040 0.5 7,100 0.00080 11.4 3/16 800 0.00067 1.1 500 0.00048 0.5 6,300 0.00095 12.0 1/4 630 0.00095 1.3 400 0.00071 0.6 5,000 0.00132 13.3 5/16 500 0.00132 1.4 315 0.00100 0.6 4,000 0.00190 15.3 3/8 450 0.00160 1.5 280 0.00118 0.6 3,550 0.00212 15.0 7/16 355 0.00212 1.5 224 0.00140 0.6 2,800 0.00265 14.9 1/2 315 0.00236 1.5 200 0.00180 0.8 2,500 0.00300 15.0 9/16 280 0.00280 1.6 180 0.00200 0.8 2,240 0.00315 14.1 5/8 250 0.00315 1.6 160 0.00224 0.8 2,000 0.00335 13.4 11/16 224 0.00355 1.6 140 0.00250 0.8 1,800 0.00375 13.5 3/4 224 0.00355 1.6 140 0.00250 0.8 1,800 0.00375 13.5 13/16 200 0.00400 1.6 125 0.00280 0.8 1,600 0.00400 12.8 7/8 180 0.00400 1.5 112 0.00315 0.8 1,400 0.00425 11.9 15/16 160 0.00400 1.3 100 0.00355 0.8 1,250 0.00450 11.3 1 160 0.00400 1.3 100 0.00355 0.8 1,250 0.00450 11.3 1-1/8 140 0.00400 1.1 90 0.00400 0.8 1,120 0.00475 10.6 1-1/4 125 0.00400 1.0 80 0.00400 0.6 1,000 0.00475 9.5 1-3/8 112 0.00400 0.9 71 0.00400 0.6 900 0.00500 9.0 1-1/2 100 0.00400 0.8 63 0.00400 0.5 800 0.00500 8.0 1-5/8 100 0.00400 0.8 63 0.00400 0.5 800 0.00500 8.0 1-3/4 90 0.00400 0.8 56 0.00400 0.5 710 0.00500 7.1 1-7/8 80 0.00400 0.6 50 0.00400 0.4 630 0.00500 6.3 2 80 0.00400 0.6 50 0.00400 0.4 630 0.00500 6.3 1) Based on regular 2FL cutting depth (1/2D) 4FL depth (1/4D) . 2) In case of deeper operation, slow down feed by 20-50%. 1/2 D 2FL 1/4 D 4FL 1128 End Mill Technical WWW.OSGTOOL.COM