Drill Doctor XP - Manual (Page 9)

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3. Split the point
Press Chuck slowly and firm-
ly into the Splitting Port until
it stops. Remove the chuck,
rotate one-half turn, and
repeat.
Check the tip of the bit care-
fully to determine that both
sides of the bit are split equal-
ly. Compare it to this illustra-
tion. If it does not match,
study the information below.
Identifying Correctly Split Drill Bits
(And What to Do With Those That Aren’t!)
Correctly Split
Grit Tube Attachment
The Grit Tube attach-
ment is designed to keep
any sparks caused by
sharpening safely inside
the machine and away
from you. In addition, the
Grit Tube reduces the
sharpening dust in the
air and on your work-
bench.
Simply insert the Grit Tube into the Splitting Port of your
Drill Doctor when sharpening. It will catch the grit that is
formed from the sharpening process. Clean the inside of
your Drill Doctor and the Grit Tube on a regular schedule.
The grit tube is designed to accept a standard 1-1/4" shop
vacuum for extended periods of sharpening.
Split lines are nearly straight
across.
Undersplit
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.
Split Line
Solution
More grinding is needed for larg-
er drill bits. If one side of the bit
is undersplit, insert the Chuck
into the Splitting Port again and
split both sides. Push the Chuck
into the Port until it stops.
Repeat until the split sides are
equal and look like the correctly
split bit shown above.
Oversplit
Too much material
removed.
Split lines are joined
in the center and
Chisel Edge has
been removed.
Solution
Reinsert the chucked bit into the
Sharpening Port and remove
enough of the tip until the split
tip looks like the correctly split
bit above.
Splitting Port