OPERATING GUIDELINES , ROUND LINE - HIGH FEED END MILL (4 AND/OR 6 FLUTE) OPERATING GUIDELINES Series 47A, 48A Workpiece Material Diameter / Programming cutting speed feed per tooth recommended radius cutting depth in Vc in/min fz (in) ap (in) Super alloys .250 R.040 130 - 250 .008 .004 S .312 R.065 130 - 250 .008 .008 .375 R.080 130 - 250 .012 .012 .500 R.100 130 - 250 .012 .012 .625 R.125 130 - 250 .015 .020 .750 R.160 130 - 250 .015 .020 1.00 R.145 130 - 250 .018 .020 Hardened steel .250 R.040 300 - 450 .012 .004 < 50 HRC .312 R.065 300 - 450 .012 .008 .375 R.080 300 - 450 .015 .012 .500 R.100 300 - 450 .015 .012 .625 R.125 300 - 450 .020 .020 .750 R.160 300 - 450 .020 .020 1.00 R.145 300 - 450 .020 .020 Hardened steel .250 R.040 150 - 250 .008 .004 < 58 HRC .312 R.065 150 - 250 .008 .008 .375 R.080 150 - 250 .012 .008 .500 R.100 150 - 250 .012 .012 .625 R.125 150 - 250 .015 .015 .750 R.160 150 - 250 .015 .015 1.00 R.145 150 - 250 .015 .015 467