Identifying Correctly Sharpened Drill Bits; Sharpening Bits Of Different Lengths And Diameters - DRILL DOCTOR 350X Mode D'emploi

Identifying Correctly Sharpened Drill Bits

(and what to do with those that aren't!)
Correctly Sharpened Bits
Chisel Point
Heel
Cutting Edge
Problem
The Chisel Edge
is ground flat.
Problem
Cause
Too much drill bit is sticking out of
Surface of the the end of the chuck.
bit isn't smooth
Solution
and/or heavy
grinding sound.
Realign the bit. During the re-align-
ment process, be sure to keep the
White Triangle against the Cam
Guide as you insert the Chuck into
the Sharpening Port to set the depth
of the bit. The bit should be pushed
up inside the Chuck and should
rotate slightly as the Chuck is
plunged into the Sharpening Port
and contacts the Diamond Sharpen-
ing Wheel. Push until the Chuck is
fully inserted into the Port.
10
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 (positive relief).
Cause
Alignment Fingers did not
position the drill bit properly
in the aligning process (page
7-8).
Solution
Realign the bit by carefully fol-
lowing steps 1 through 3 on
page 7-8.
www.drilldoctor.com
Problem
Heel same height or higher
than the cutting edge
Cutting Edge
Heel
Relief Angle
Problem
Bit backing out or
slipping out of the
jaws when you are
sharpening
Sharpening Bits of Different
Lengths and Diameters
Drill Bits Of Different Sizes
Too many rotations of a small-diameter bit may result in
incorrect sharpening and too few on a large bit may not
sharpen enough.
• 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.
www.drilldoctor.com
Cause
Bit is misaligned or the Cam
failed to stay in contact with
the Cam Guide during sharp-
ening.
Solution
Carefully repeat the alignment
and sharpening procedure,
making sure to use light pres-
sure to keep the Cam in contact
with the Cam Guide during
sharpening.
Cause
Too much pressure during
sharpening, dirty Chuck, or
Chuck not tightened enough.
Solution
Use just enough pressure to
keep the Cam in contact with
the Cam Guide. If the bit con-
tinues to slip, clean the Chuck
as described on Page 17.
11