10-26-2007, 04:59 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,887
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Drill bit sharpening
Most drill bits can be sharpened manually with a fine grit wheel. The web, the midpoint between the two flutes should be maintained at a 60 degree angle, 1) to make it drill accurately and 2) to give a sharp cutting angle. The back side of a cutting edge is called the "rake angle."
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