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Identifying Correctly Split Drill Bits
(And what to do with those that are
Correctly Split
Solution
Split lines are nearly straight
across.
Oversplit
Solution
Reinsert the chucked bit into
the Sharpening Port and
sharpen until the split tip looks
like the correctly split bit above,
checking every few rotations.
Undersplit
Solution
More grinding is needed for
larger drill bits. If one side of
the bit is under split, insert
the Chuck into the Splitting
Port again and split both sides.
Repeat until the split sides are
equal and look like the correctly
split bit shown above.
Split lines do not
meet in the center but
Chisel Edge remains.
Not enough material
has been removed
from the Heel of the
drill bit.
Too much material
removed.
Split lines are joined in
the center and Chisel
edge has been removed.
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