METAL DRILLING REFERENCE GUIDE - irwin.com

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2004 Printed in , NC for High Speed Steel DrillsSFM*Aluminum and its Alloys200-300Brass and Bronze (Ordinary)150-300Bronze (High Tensile)70-150Die Castings (Zinc Base)300-400Iron-Cast (Soft)100-150Cast (Medium hard)70-100Hard Chilled30-40Malleable80-90Magnesium and its Alloys250-400Monel METAL or High-Nickel Steel30-50Plastics or Similar Materials (Bakelite)100-300Steel - Mild (.2carbon to .3carbon)80-110Steel (.4carbon to .5carbon)70-80Tool ( )50-60Forgings40-50Alloy - 300to 400Brinell20-30High Tensile (Heat Treated)35to 40Rockwell C30-4040to 45Rockwell C25-3545to 50Rockwell C15-2550to 55Rockwell C7-15Stainless SteelFree Machining Grades30-80Work Hardening Grades15-50Wood300-400*Surface Feet per Minute (SFM)Drill DiameterRangeLightMediumHeavy1/16 to 1.

©2004 Printed in U.S.A. Huntersville, NC 28078 1-800-GO-IRWIN www.irwin.com MD04-300 Speeds for High Speed Steel Drills SFM* Aluminum and its Alloys 200-300