Identifying Correctly Sharpened Drill Bits - Drill Master XP User Manual

The number of turns needed to sharpen the bit
depends on the size.
• Turn the Chuck an even number of half-turns with
light, inward pressure:
3/32 inch bits—use 2 to 4 half-turns,
1/8 inch bits—use 4 to 6 half-turns,
3/8 inch bits—use 16 to 20 half-turns.

Identifying Correctly Sharpened Drill Bits

(and what to do with those that aren't!)
Correctly Sharpened Bits
Heel Cutting Edge
Chisel Edge
Incorrectly Sharpened Bits
Problem
The Chisel Edge is
ground flat.
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The entire surface from the Cut-
ting Edge to the Heel will have a
finely ground surface without
ridges or indentations. The Heel
will always be lower than the
Cutting Edge (positive relief.)
The Chisel Edge will be clean and
straight.
Cause
Chuck Jaws did not grip drill bit
properly in the aligning process
(Page 12).
Solution
Realign the bit by carefully fol-
lowing steps 1 through 5 on
Pages 12 to 13.
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