REPLACEABLE POINT DRILLS OPERATING GUIDELINES Cutting Feed vs. Drill Diameter ipr Material Speed ISO Number Vc sfm D=.268-.429 D=.433-.508 D=.512-.587 D=.591-.665 D=.669-.823 D=.827-1.020 1 160-430 2 330-390 3 300-360 .005-.008 .006-.010 .008-.012 .010-.014 .010-.018 .010-.018 4 300-390 5 230-300 P 6 160-360 7 230-360 .005-.008 .006-.010 .008-.012 .010-.014 .012-.016 .012-.018 8 200-300 9 130-230 10 160-260 .005-.008 .005-.009 .006-.010 .008-.011 .010-.013 .010-.014 11 130-230 12 M 13 70-160 .003-.006 .005-.009 .005-.006 .006-.008 .006-.009 .006-.011 14 15 300-460 16 260-430 K 17 330-590 .008-.012 .010-.014 .012-.016 .014-.018 .016-.020 .016-.024 18 19 300-520 20 21 22 300-520 23 24 N 2526 260-390 .008-.014 .010-.016 .012-.018 .014-.018 .016-.024 .016-.026 27 28 300-520 29 30 31 100-160 32 33 70-130 .002-.004 .003-.005 .004-.006 .005-.007 .005-.008 .005-.009 S 34 35 36 70-160 .002-.005 .004-.006 .005-.007 .006-.008 .006-.009 .006-.010 37 38 H 3940 70-160 .002-.005 .004-.006 .005-.007 .006-.008 .006-.009 .006-.010 41 677