Sharpening Bits Of Different Lengths And Diameters - Drill Master JOURNEYMAN 400 User Manual

Sharpening Bits of Different Lengths
and Diameters
Drill Bits Of Different Sizes
Too many rotations of a small diameter bit may result in incorrect
sharpening and too few on a large bit may not sharpen enough.
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 6 or more half-turns.
Large Drill Bits
Large drill bits (3/8" to 1/2") will require increased pressure
and more half-turns (20 or more) of the Chuck. A well sharpened
bit will have a smooth surface from cutting edge to heel. It may
take two or three complete sharpenings (repeat all steps) to
resharpen a very dull or chipped large drill bit.
Short Drill Bits
Often bits smaller than 1/8" in diameter are so short they will
not stick out of the back of the Chuck. After inserting a small bit
into the Chuck and while holding the Alignment Button in, insert
the Chuck into the Alignment Hole. Then, insert a finger into the
back of the Chuck Knob and push the bit forward against the
Drill Stop. Look through the Window and make sure the Bit
Clamps grasp the bit at the narrowest point when you release
the Alignment Button.
Correct
Incorrect
12
Tighten the Chuck Knob, but
before sharpening small bits,
look through the back of the
Chuck to be sure all Chuck Jaws
are straight against the drill bit.
If the Jaws appear to be out of
line, move the Chuck Knob
slightly to the left just until the
Jaws straighten—do not loosen
the Chuck Knob or the bit will
loosen and the alignment will be
lost. Now, sharpen the bit in the
usual manner.
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