Cobalt High Speed Steel
List 1000 - EX-GOLD®: Stub List 1500 - EX-GOLD®: Jobbers
General Drilling Operations
Stainless Steels
Low Carbon Steels 1010, 1018
Meduim Carbon Steels 1035, 1045
Work Material
Alloy Steels 4140, 4340
Tool Steels D2, H13
300SUS, 400SUS
15-5PH ,17-4PH
Drilling Speed
105-130 SFM 70-100 SFM 65-80 SFM
25-40 SFM 40 - 60 SFM 20 - 26 SFM
Drill Dia.
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Decimal
mm Inch - 5/64 0.0781 5,750 0.002 - 0.004 4,160 0.002 - 0.004 3,550 0.002 - 0.004 1,590 0.002 - 0.004 2,445 0.001-0.002 1,080 0.0006-0.001 2 - – 5,710 0.002-0.004 4,120 0.002-0.004 3,520 0.002-0.004 1,570 0.002-0.004 2,430 0.001-0.002 970 0.0008-0.0012 - 3/32 0.0938 4,790 0.003-0.004 3,460 0.003-0.004 2,960 0.003-0.004 1,320 0.003-0.004 2,040 0.001-0.003 810 0.0010-0.0014 3 - – 3,800 0.004-0.005 2,750 0.004-0.005 2,350 0.004-0.005 1,050 0.004-0.005 1,620 0.001-0.003 650 0.0012-0.0018 - 1/8 0.1250 3,590 0.004-0.005 2,600 0.004-0.005 2,220 0.004-0.005 990 0.004-0.005 1,530 0.001-0.003 610 0.0013-0.0019 4 - – 2,850 0.004-0.006 2,060 0.004-0.006 1,760 0.004-0.006 790 0.004-0.006 1,210 0.002-0.004 490 0.0016-0.0024 - 3/16 0.1875 2,390 0.005-0.007 1,730 0.005-0.007 1,480 0.005-0.007 660 0.005-0.007 1,020 0.002-0.005 410 0.0019-0.0028 6 - – 1,900 0.005-0.007 1,370 0.005-0.007 1,170 0.005-0.007 530 0.005-0.007 810 0.002-0.006 320 0.0024-0.0035 - 1/4 0.2500 1,800 0.005-0.007 1,300 0.005-0.007 1,110 0.005-0.007 500 0.005-0.007 760 0.002-0.006 310 0.0026-0.0037 8 - – 1,430 0.007-0.009 1,030 0.007-0.009 880 0.007-0.009 390 0.007-0.009 610 0.003-0.008 240 0.0031-0.0047 - 3/8 0.3750 1,200 0.008-0.011 870 0.008-0.011 740 0.008-0.011 330 0.008-0.011 510 0.004-0.009 200 0.0037-0.0056 10 - – 1,140 0.008-0.011 820 0.008-0.011 700 0.008-0.011 320 0.008-0.011 490 0.004-0.010 190 0.0039-0.0059 - 7/16 0.4375 1,030 0.009-0.012 740 0.009-0.012 630 0.009-0.012 280 0.009-0.012 440 0.004-0.011 170 0.0043-0.0066 12 - – 950 0.009-0.012 680 0.009-0.012 580 0.009-0.012 260 0.009-0.012 400 0.005-0.012 160 0.0047-0.0071 - 1/2 0.5000 900 0.010-0.013 650 0.010-0.013 550 0.010-0.013 250 0.010-0.013 380 0.005-0.013 150 0.0050-0.0075 14 - – 810 0.011-0.014 590 0.011-0.014 500 0.011-0.014 230 0.011-0.014 350 0.005-0.014 140 0.0055-0.0083 - 5/8 0.6250 720 0.012-0.015 520 0.012-0.015 440 0.012-0.015 200 0.011-0.014 310 0.006-0.016 120 0.0062-0.0093 18 - – 630 0.013-0.016 450 0.013-0.016 390 0.013-0.016 180 0.012-0.015 270 0.007-0.018 110 0.0071-0.0106 - 3/4 0.7500 600 0.014-0.017 430 0.014-0.017 370 0.014-0.017 170 0.013-0.016 250 0.007-0.019 105 0.0075-0.0112 General Drilling Operations
High Heat Material
Hardened Steel
Work Material
Cast Iron
Cast Aluminum
Ti Alloy Ti-6Al-4V
Ni & Co Base Material Inconel718, Waspaloy
33-43 HRC
Drilling Speed
105 - 130 SFM
205 - 330 SFM
20 - 26 SFM
20 - 26 SFM
40 - 60 SFM
Drill Dia.
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Decimal
mm Inch - 5/64 0.0781 5,750 0.003 - 0.004 13,090 0.006 - 0.008 1,080 0.0006-0.001 1,080 0.0006-0.001 2,445 0.001-0.002 2 - – 5,700 0.003-0.004 13,000 0.006-0.008 1,120 0.0008-0.0012 970 0.0008-0.0012 2,430 0.001-0.002 - 3/32 0.0938 4,790 0.003-0.004 10,900 0.007-0.009 940 0.0010-0.0014 810 0.0010-0.0014 2,040 0.001-0.003 3 - – 3,800 0.004-0.006 8,650 0.008-0.011 740 0.0012-0.0018 650 0.0012-0.0018 1,620 0.001-0.003 - 1/8 0.1250 3,590 0.004-0.006 8,180 0.008-0.011 700 0.0013-0.0019 610 0.0013-0.0019 1,530 0.001-0.003 4 - – 2,850 0.006-0.008 6,480 0.010-0.013 560 0.0016-0.0024 490 0.0016-0.0024 1,210 0.002-0.004 - 3/16 0.1875 2,390 0.006-0.009 5,450 0.011-0.016 470 0.0019-0.0028 410 0.0019-0.0028 1,020 0.002-0.005 6 - – 1,900 0.007-0.010 4,320 0.013-0.018 370 0.0024-0.0035 320 0.0024-0.0035 810 0.002-0.006 - 1/4 0.2500 1,800 0.008-0.010 4,090 0.013-0.019 350 0.0026-0.0037 310 0.0026-0.0037 760 0.002-0.006 8 - – 1,430 0.008-0.012 3,240 0.015-0.021 280 0.0031-0.0047 240 0.0031-0.0047 610 0.003-0.008 - 3/8 0.3750 1,200 0.010-0.014 2,730 0.017-0.025 230 0.0037-0.0056 200 0.0037-0.0056 510 0.004-0.009 10 - – 1,140 0.010-0.014 2,600 0.018-0.025 220 0.0039-0.0059 190 0.0039-0.0059 490 0.004-0.010 - 7/16 0.4375 1,030 0.011-0.015 2,340 0.019-0.027 200 0.0043-0.0066 170 0.0043-0.0066 440 0.004-0.011 12 - – 950 0.011-0.016 2,160 0.020-0.028 190 0.0047-0.0071 160 0.0047-0.0071 400 0.005-0.012 - 1/2 0.5000 900 0.012-0.017 2,040 0.021-0.030 180 0.0050-0.0075 150 0.0050-0.0075 380 0.005-0.013 14 - – 820 0.012-0.017 1,850 0.022-0.031 160 0.0055-0.0083 140 0.0055-0.0083 350 0.005-0.014 - 5/8 0.6250 720 0.013-0.018 1,640 0.023-0.032 140 0.0062-0.0093 120 0.0062-0.0093 310 0.006-0.016 18 - – 630 0.013-0.018 1,440 0.024-0.033 120 0.0071-0.0106 110 0.0071-0.0106 270 0.007-0.018 - 3/4 0.7500 600 0.014-0.019 1,360 0.025-0.034 115 0.0075-0.0112 105 0.0075-0.0112 250 0.007-0.019
1. Speeds and feeds are based on using soluble oil where applicable 1:5 to 1:10 concentration. 2. When other than an end mill collet is used, make sure the drill shank is firmly attached. 3. For deep holes (4 times the drill diameter or deeper) use the lower recommended feed rate as a starting point and increase as needed for the best result. 4. Recommended feeds and speeds are starting points only. Actual performance will be determined by specific material, the condition of equipment being used, and coolant.
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Drilling Technical
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