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Adjust bit position,
tighten Chuck, and
sharpen as usual
Refer to pages 12-14 for
these steps. Experiment with
a few different settings to
find the one that best suits
your drill bits and applica-
tion. You may find it helpful
to mark this setting for
future use.
3.
Using the Variable Material Take-Off (MTO)
The
Model 750X
enables
you to remove more or less
material from the tip of your
bit when you sharpen. If
your bit is only slightly dull
and you simply wish to
“touch up” its point, turn the
Material Take-Off (MTO)
Knob
clockwise
to reduce the amount of time it takes to
sharpen the bit. If your drill bit is quite dull or damaged,
turn the MTO Knob
counter-clockwise
to increase the
amount of material removed. The MTO adjusts from 0 to
.040 of an inch in increments of .005". Prior to aligning the
bit, turn the MTO Knob
counter-clockwise
until it stops.
(This is the maximum material that can be removed in one
sharpening.) Then turn it
clockwise
3 marks on the MTO
knob. This is a good place to start for most bits.
Now turn the MTO knob either direction to adjust the
desired MTO. Each mark on the MTO knob is equal to a
.005" change in material removed from the bit each time it
is sharpened.
Note: After you have sharpened your bits on the Drill Doc-
tor
®
at least one time, it is desirable to turn the MTO Knob
such that only a small amount of material is removed from
the bit each time it is sharpened. This will significantly
decrease the time to sharpen as well as extend your bit and
wheel life. Once you’ve made your adjustment, align and
sharpen your bit as usual.
Variable Material
Take-Off Knob
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