Sharpening Bits Of Different Lengths, Diameters, And Types; Large Drill Bits; Small Drill Bits - Drill Master XP User Manual

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 purchase 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 118º 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.
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