Identifying Correctly Sharpened Drill Bits; Points - Drill Master 750X User Manual

Identifying Correctly Sharpened
Drill Bits (and what to do with
those that aren't!)
Correctly Sharpened Bits
Chisel Point
Heel
Cutting Edge
Incorrectly Sharpened Bits
Problem
The Chisel Edge
is ground flat.
Problem
The Chisel Edge is
not clean or
straight.
12
The entire surface from the
Cutting Edge to the Heel will
have a finely ground surface
without ridges or indenta-
tions. The Heel will always
be lower than the Cutting
Edge. The Chisel Edge will be
clean and straight.
Cause
Chuck Jaws did not grip drill
bit properly in the aligning
process (Page 8).
Solution
Realign the bit by carefully
following steps 1 through 5
on Pages 8 to 10.
Cause
The bit isn't completely ground yet.
Solution
Continue sharpening the bit until
the chisel is clean and straight. If
the machine quits removing mate-
rial before the chisel is clean, re-
align and sharpen again. (Model
750X users can increase or
decrease MTO (material take-off)
to speed up this process.
www.drilldoctor.com
Pro
Insuffe
relief o
drill bit
Heel
Relief A
Pro
Bit bac
slipping
jaws w
sharpe
Spli
Split
before
This f
center
chisel
to be d
Due t
split p
thrus
point)
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