Transcription of METAL DRILLING REFERENCE GUIDE - irwin.com
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METAL DRILLING REFERENCE GUIDE - irwin.com
2004 Printed in , NC for High Speed Steel DrillsSFM*Aluminum and its Alloys200-300 Brass and Bronze (Ordinary)150-300 Bronze (High Tensile)70-150 Die Castings (Zinc Base)300-400 Iron-Cast (Soft)100-150 Cast (Medium hard)70-100 Hard Chilled30-40 Malleable80-90 Magnesium and its Alloys250-400 Monel METAL or High-Nickel Steel30-50 Plastics or Similar Materials (Bakelite)100-300 Steel - Mild (.2carbon to .3carbon)80-110 Steel (.4carbon to .5carbon)70-80 Tool ( )50-60 Forgings40-50 Alloy - 300to 400 Brinell20-30 High Tensile (Heat Treated)35to 40 Rockwell C30-4040to 45 Rockwell C25-3545to 50 Rockwell C15-2550to 55 Rockwell C7-15 Stainless SteelFree Machining Grades30-80 Work Hardening Grades15-50 Wood300-400*Surface Feet per Minute (SFM)Drill DiameterRangeLightMediumHeavy1/16 to 1.
Dia./ Type Dec. Equiv. Fractional Tap Machine Screw Tap Metric Tap Screw Ext. 1/64" .0156 1/32" .0312 1.0 mm .0394 60 .0400 59 .0410 58 …
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