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Sharpening Bits of Different Lengths,
Diameters, and Types
Too many rotations of a small-diameter bit may result in incorrect
sharpening and too few on a large bit may not sharpen enough.
Continue to sharpen until the Chisel Edge is clean and straight
and the entire surface from the Cutting Edges to the Heel is finely
ground.
•
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.
Large Drill Bits
The Model XP sharpens bits from 3/32” to 1/2”. You can also pur-
chase a Large Bit Chuck that sharpens bits up to 3/4”. Large bits
are sharpened just like any other bit.
It is important to sharpen these bits so that the entire face of the
drill bit is sharpened. A large bit requires more pressure and will
require more half-turns to sharpen it. Bits 1/2” or larger will need
a minimum of 40 half turns. A 3/4” bit may require up to 60 half
turns. It may take two or three complete sharpenings (repeat all
steps) to re- sharpen a very dull or chipped large drill bit.
Short Drill Bits & Bit Smaller than 1/8”
Put the bit in the Chuck as normal, but tighten Chuck so that
it is just snug enough for the bit to move freely. Push and hold
the Alignment Button. Partially insert the Chuck in the Alignment
Port, but do not push the Chuck all the way in. Use the Chuck
Knob to rotate the bit until it can be held by the Bit Clamp Arms in
the narrowest width of the bit. Make sure that the bit is touching
the Drill Stop, then release the Alignment Button. Turn the Chuck
until the Alignment Guide on the Chuck aligns with the 118° notch
on the Alignment Port. Now, push the Chuck the rest of the way in.
Tighten the Chuck, remove, and tighten again. Sharpen the small
bit as usual, but use very light pressure and an even number of
turns. The bit should only briefly contact the wheel.
Summary of Contents for XP
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