Drill Doctor 750X - Manual (Page 7)

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Tighten Chuck
Hold onto the Chuck and
tighten the Chuck Knob.
(Avoid over-tightening the
Chuck in the Alignment Port.
This could damage the Chuck
and Port.)
Remove and re-tighten
Press the Alignment Button
and remove the chucked drill
bit. Tighten the Chuck once
more to ensure the bit won’t
move when you sharpen it.
You are now ready to sharpen
the drill bit.
5.
Sharpening the Drill Bit
Before sharpening you should know:
• Keep the Cam in contact with the Cam Guide as you
sharpen
—push the Chuck straight into the Port.
• Only light pressure is required.
1.
Cam Guide
Align Guides
Turn the Drill Doctor on.
Align either of the Sharpen-
ing Guides with the Cam
Guide on the machine.
Cam
4.
Insert Chuck and turn
until the bit is sharp
Insert the Chuck in the
Sharpening Port. Making
sure you keep the Cam
against the Cam Guide,
rotate the Chuck one half-
turn in a clockwise direc-
tion—from Sharpening Guide
to Sharpening Guide—an
even number of times. Your
motion should be smooth and
even. To sharpen both sides of the bit evenly, always use
an even number of half-turns. 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.
Note: Use just enough pressure to keep the Cam against
the Cam Guide. Let the machine do the sharpening.
Sharpening
Guide
Adjust Bit Position
Look at your bit and make
sure the Clamp Arms are in
the bit’s narrowest spot. If
they aren’t, turn the bit in the
chuck so that it is held by the
Bit Clamp Arms at the nar-
rowest width. This is impor-
tant because this setting
determines the angle at which
your bit will be sharpened.
3.
Drill Bit Stop
Bit Clamp Arms
2.
• You will hear a grinding noise ( z z z z z z z z z ) as you
complete each half-turn and each side of the bit face is
ground.
• The Chuck will rock as you turn it and the Cam rides
on the Guide.
Cam
Against
Cam Guide