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Variable Material
Take-Off Knob
The Model DD750X 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-O (MTO)
Knob clockwise to reduce
the amount of material that is
removed from the drill 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.
Each mark on the MTO knob is equal to a .005” change in material
removed from the bit each time it is sharpened.
Using the Variable Material Take-O (MTO)
Questions and Answers
1. Question:
Why was my drill bit sharpened improperly?
Answer:
The most common cause of improper sharpening is incorrect
alignment.
Key causes are:
• Chuck not inserted into the Sharpening Port correctly.
Ensure the Alignment Guides (raised ns) are tted into the
correct alignment slot.
• Drill not aligned in the Chuck Jaws correctly. Ensure bit
clamp arms are holding in the narrowest part of the bit.
• The type of drill requires an angle adjustment to achieve
• the desired Chisel and Relief Angles. Try using the Variable
• Alignment to adjust the Chisel and Relief Angle.
• Chuck is dirty or the bit slipped out of alignment.
• See “Cleaning the Chuck.”
2. Question:
When I aligned the drill bit and sharpened it, why was no
material removed?
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