FRACTIONAL 6 Flute Countersink Series Diameter (D1) 606 Vc (inch) Fractional Hardness (sfm) 1/8 3/16 1/4 3/8 1/2 3/4 1 ≤ 250 Bhn 53 RPM 1620 1080 810 540 405 270 202 or (42-64) Fr 0.0006 0.0009 0.0012 0.0019 0.0025 0.0037 0.0049 STAINLESS STEELS ≤ 24 HRc Feed (ipm) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 (FREE MACHINING) 46 RPM 1406 937 703 469 351 234 176 303, 416, 420F, 430F 440F ≤ 330 Bhn or (37-55) Fr 0.0005 0.0007 0.0010 0.0015 0.0020 0.0030 0.0040 ≤ 36 HRc Feed (ipm) 0.7 0.7 0.7 0.7 0.7 0.7 0.7 M 28 RPM 856 570 428 285 214 143 107 ≤ 275 Bhn STAINLESS STEELS or (22-34) Fr 0.0007 0.0011 0.0014 0.0021 0.0028 0.0042 0.0056 (DIFFICULT) ≤ 28 HRc Feed (IPM) 0.6 0.6 0.6 0.6 0.6 0.6 0.6 304, 316, 321, 13-8 PH, 21 RPM 642 428 321 214 160 107 80 15-5PH, 17-4 PH, ≤ 375 Bhn Custom 450 or Fr 0.0003 0.0005 0.0006 0.0009 0.0012 0.0019 0.0025 ≤ 40 HRc (17-25) Feed (IPM) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 ≤ 220 Bhn 18 RPM 550 367 275 183 138 92 69 or (14-22) Fr 0.0005 0.0008 0.0011 0.0016 0.0022 0.0033 0.0044 ≤ 19 HRc Feed (ipm) 0.3 0.3 0.3 0.3 0.3 0.3 0.3 SUPER ALLOYS 14 RPM 428 285 214 143 107 71 53 (NICKEL, COBALT, ≤ 320 Bhn IRON BASE) or Fr 0.0005 0.0007 0.0009 0.0014 0.0019 0.0028 0.0037 Inconel 601, 617, 625, ≤ 34 HRc (11-17) Incoloy 800, Monel 400, Feed (ipm) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Rene, Waspaloy 12 RPM 367 244 183 122 92 61 46 ≤ 425 Bhn or (10-14) Fr 0.0003 0.0004 0.0005 0.0008 0.0011 0.0016 0.0022 ≤ 45 HRc Feed (ipm) 0.1 0.1 0.1 0.1 0.1 0.1 0.1 S 36 RPM 1100 733 550 367 275 183 138 ≤ 275 Bhn or (29-43) Fr 0.0009 0.0014 0.0018 0.0027 0.0036 0.0055 0.0073 ≤ 28 HRc Feed (ipm) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 TITANIUM ALLOYS 28 RPM 856 570 428 285 214 143 107 Pure Titanium, Ti6Al4V, ≤ 350 Bhn Ti6Al2Sn4Zr2Mo, or (22-34) Fr 0.0007 0.0011 0.0014 0.0021 0.0028 0.0042 0.0056 Ti4Al4Mo2Sn0.5Si, ≤ 38 HRc Feed (ipm) 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Ti-6Al4V ≤ 440 Bhn 21 RPM 642 428 321 214 160 107 80 or (17-25) Fr 0.0003 0.0005 0.0006 0.0009 0.0012 0.0019 0.0025 ≤ 47 HRc Feed (ipm) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 continued on next page 324 DRILLS www.kDyRoIcLeLrSa-sgstool.com