HSS-CO End Mills 4 & 6 Flute Standard 4 Flute and 6 Flute HSS-Co: (Continued) Side Milling Hardness 30 to 40 HRC 40 to 50 HRC – High Tensile SteelsWork MaterialTool SteelsMedium Strength Stainless Steels andTitanium AlloysHeat ResistantHigh Strength StainlessSteels and Titanium AlloysAluminumAlloyed AluminumPlasticsWoods Cutting Speed 30-50 SFM 16-32 SFM 150-390 SFM Mill Dia. SpeedRPM IPT Feed Speedin/minRPM IPT Feed Speedin/minRPM IPT Feedin/min 1/16 2,500 0.00012 1.1 1,600 0.00008 0.5 20,000 0.00020 16.0 5/64 2,000 0.00017 1.4 1,250 0.00011 0.5 20,000 0.00028 22.4 3/32 1,600 0.00024 1.5 1,000 0.00016 0.6 20,000 0.00038 30.0 7/64 1,400 0.00028 1.5 900 0.00020 0.8 18,000 0.00043 30.6 1/8 1,250 0.00034 1.6 800 0.00024 0.8 16,000 0.00050 32.0 9/64 1,120 0.00040 1.8 710 0.00028 0.8 14,000 0.00060 33.6 5/32 1,000 0.00048 1.9 630 0.00034 0.9 12,500 0.00071 35.5 11/64 900 0.00056 2.0 560 0.00040 0.9 11,200 0.00080 35.9 3/16 800 0.00067 2.1 500 0.00048 1.0 10,000 0.00095 38.0 1/4 630 0.00095 2.4 400 0.00071 1.1 8,000 0.00132 42.3 5/16 500 0.00132 2.6 315 0.00100 1.3 6,300 0.00190 47.9 3/8 450 0.00160 2.9 280 0.00118 1.4 5,600 0.00212 47.5 7/16 355 0.00212 3.0 224 0.00140 1.3 4,500 0.00265 47.8 1/2 315 0.00236 3.0 200 0.00180 1.5 4,000 0.00300 48.0 9/16 280 0.00280 3.1 180 0.00200 1.5 3,550 0.00315 44.8 5/8 250 0.00315 3.1 160 0.00224 1.4 3,150 0.00335 42.3 11/16 224 0.00355 3.1 140 0.00250 1.4 2,800 0.00375 42.0 3/4 224 0.00355 3.1 140 0.00250 1.4 2,800 0.00375 42.0 13/16 200 0.00400 3.3 125 0.00280 1.4 2,500 0.00400 40.0 7/8 180 0.00400 2.9 112 0.00315 1.4 2,240 0.00425 38.1 15/16 160 0.00400 2.5 100 0.00355 1.4 2,000 0.00450 36.0 1 160 0.00400 2.5 100 0.00355 1.4 2,000 0.00450 36.0 1-1/8 140 0.00400 2.3 90 0.00400 1.5 1,800 0.00475 34.3 1-1/4 125 0.00400 2.0 80 0.00400 1.3 1,600 0.00475 30.4 1-3/8 112 0.00400 1.8 71 0.00400 1.1 1,400 0.00500 28.0 1-1/2 100 0.00400 1.6 63 0.00400 1.0 1,250 0.00500 25.0 1-3/4 90 0.00400 2.1 56 0.00400 1.4 1,120 0.00500 33.6 2 80 0.00400 1.9 50 0.00400 1.3 1,000 0.00500 30.0 1) Based on regular 4FL end mills. cutting depth (1.5D) x cutting width (0.1D) 2) For finish cut, increase RPM 30-50%. 1-1/2”; 4 Flutes 1-3/4”, 2”, 6 Flutes 1130 End Mill Technical WWW.OSGTOOL.COM