Forstner Drill Bit

Sharpen the insert so the point angle is as noted below.

The absolute best source for sharpening this tool is Leonard Lee's book, The Complete Guide to Sharpening, Chapter 15. (This is a must-have for any sharpener's library.)

Other notes :

  • Ensure both shoulders are the same height.
  • Ensure both rims are the same height.
  • Ensure point extends beyond the rims by at least 0.005".

  • DO NOT change
    1. the center point of the drill bit, or
    2. the diameter of the drill bit.

  • Grind the minimum off the bit.

Point Angle Chipping Bevel Rake Angle Notes
30-40º
10º


Notes & Comments


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About this site
Remember : The goal of sharpening is to produce sharp tools, and these tools can injure you if mishandled. Safety measures should be followed to protect yourself and those in your shop. Be sure to read and follow all instructions from the manufacturer, and and utilize proper safety equipment. Never consume alcohol or anything that could impair your judgement before sharpening tools, or using sharp tools. Comments can be sent via eMail to me at SharpeningHandbook@Gmail.com.