INDEXABLE MILLING RECOMMENDED CUTTING CONDITIONS Work Material Cutting Speed (SFM)CVDPVD Material Hardness F7010 / F7030 / F620 VP15TF / AP20M P Mild Steel < 180HB 820 (660 ─980) 820 (660 ─980) Carbon Steel 180─ 280HB 590 (425 ─720) 590 (425 ─720) Alloy Steel 280─ 380HB 525 (360 ─620) 525 (360 ─620) Prehardened Steel 35─ 45HB 390 (260 ─460) 390 (260 ─460) High Alloy Steel < 300HB 425 (295 ─525) 425 (295 ─525) Sintered Steel 45─ 60HRC ─ 215 (155 ─275) M Stainless Steel < 260HB 590 (425 ─720) 590 (425 ─720) K Gray Cast Iron Tensile Strength < 350MPa ─ 570 (425 ─720) Tensile Strength 360─500MPa ─ 470 (340 ─600) Ductile Cast Iron Tensile Strength 500─800MPa ─ 360 (260 ─460) y Feed per Tooth (IPT) for Straight Line (Non-ramping) Cutting Only Type Depth of Cut (inch).040.080.120.150.180.200.240.280 .320 BRP3U .012 .009 .008 .006 ─ ─ ─ ─ ─ BRP4U .014 .012 .010 .010 .007 ─ ─ ─ ─ BRP6U .020 .016 .012 .012 .011 .009 .008 ─ ─ BRP7U .024 .020 .018 .016 .012 .013 .012 .010 .008 y Ramping Type Tool Diameter Max. Ramping Angle(inch)RMPXTan % per inch Min. Cutting Length According to Max. Ramping Angle L min. (inch)d= .094"d= .125"d= .156"d= .188"d= .250"d= .281"d= .312" .500 3.71° .065° 1.446 1.923 2.400 ─ ─ ─ ─ BRP3U .625.750 12.34°13.50° .219°.240° .429 .571 .712 ─.392.521.650─── ── ── 1.000 8.48° .149° .631 .839 1.047 ─ ─ ─ ─ .625 4.07° .071° 1.324 1.761 2.197 2.648 ─ ─ ─ BRP4U .7501.000 8.41°12.98° .148°.231° .635 .845 1.054 1.270 ─.407.541.675.814─── ── 1.250 8.18° .144° .653 .868 1.083 1.306 ─ ─ ─ 1.250 17.3° .312° .301 .401 .500 .603 .801 ─ ─ 1.500 11.78° .209° .450 .598 .746 .900 1.196 ─ ─ L BRP6U 2.0002.500 7.15° .125° .752 1.000 1.248 1.504 2.000 ─5.13°.090°1.0441.3891.7332.0892.778─── 3.000 3.99° .070° 1.343 1.786 2.229 2.686 3.571 ─ ─ 4.000 2.77° .048° 1.958 2.604 3.250 3.917 5.208 ─ ─ 2.000 11.49° .203° .463 .616 .768 .926 1.232 1.384 1.537 BRP7U 2.5003.000 7.88° .138° .681 .906 1.130 1.362 1.812 2.036 2.2615.99°.105°.8951.1901.4861.7902.3812.6762.971 4.000 4.04° .071° 1.324 1.761 2.197 2.648 3.521 3.958 4.394 Cutting Direction L254 INDEXABLE MILLING α° d