Technical InformationDrill Feeds / Speed & Coolants Drill Feeds Diameter Range (in) Normal Feeds (IPR) Heavy Feeds (IPR) 1/16 thru 1/8.001-.002.002-.004 over 1/8 thru 1/4.002-.004.004-.008 over 1/4 thru 1/2.004-.008.008-.016 over 1/2 thru 1.008-.016.016-.024 over 1.016-.024.024-.032 Recommended Drill Speeds and Coolants Ferrous Materials Brinell Surface Feet per Minute Coolant Low Carbon Steel 85-125 80-95 Soluble Oil Medium Carbon Steel 125-175 70-85 Soluble Oil High Carbon Steel 175-225 45-65 Soluble Oil Steels Alloyed Under 200 60-90 Soluble Oil 200-300 40-70 Soluble Oil Over 300 20-30 Soluble Oil Steel Drop Forgings 330-370 30-40 Cutting Oil Heat Treated370-420 20-30 Cutting Oil Over 420 10-20 Cutting Oil Grey Cast IronSoft 125 140-150 Dry Medium 120-200 50-80 Soluble Oil Hard Up to 350 25-40 Soluble Oil Titanium AlloysTi-75A 300-440 50-60 Cutting Oil Ti-150A, RS-120 300-440 40-50 Cutting Oil Ti-140A, RC 130B 300-440 30-40 Cutting Oil Ti-6AL -4V 300-440 20-30 Cutting Oil Stainless Steel300 Series 120-200 20-40 Cutting Oil 400 Series 200-300 40-70 Cutting Oil Martensitic 416, 420, F416 Plus K, 400F,4165SE, 440F 135-185 40-50 Cutting Oil Precipitation Hardening 325-375 30 Cutting Oil Cast Stainless Steel 400-450 20 Cutting Oil Heat Resisting Steels 175-22510-25 Cutting Oil Nimonic Alloys 200-300 10-20 Cutting Oil Manganese 12-14% min 125-220 10-12 Cutting Oil Spring Steels 402 15-30 Soluble Oil Non-Ferrous Materials Brinell Surface Feet per Minute Coolant Aluminum Pure 140-350 130-200 Soluble Oil Aluminum Alloys 140-330 150-300 Soluble Oil Leaded 40-100 200-325 Soluble Oil Silicon Alloy Die Cast 40-100 25-50 Soluble Oil Brass 190-210 200-250 Cutting or Soluble Oil Bronze 150-200 200-250 Soluble Oil Copper, Nickel & Copper Tin Alloy 65-100 140-200 Cutting or Soluble Oil Copper Aluminum Alloys 30-100 120-200 Cutting or Soluble Oil Magnesium Alloys Wrought 50-90 140-330 Cutting or Soluble Oil Cast 50-90 140-365 Cutting or Soluble Oil Nickel Alloys- Wrought and Cast 80-170 70Cutting or Soluble Oil Monel 115-240 55 Cutting or Soluble Oil Berylilium Nickel 200-250 12 Soluble Oil Zinc Alloy 112-126 200-250 Soluble Oil Armor Plate 200-250 40 Soluble Oil 250-300 35 Soluble Oil 300-350 30 Cutting Oil
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