Drill Doctor XP - Manual (Page 8)

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Split Points
Split point drill bits prevent walk-around on the material
before they begin to cut.
This feature is described as self-centering. The need to
center punch is effectively eliminated. A standard drill bit
chisel point has to wear an area in the middle of the hole
to be drilled before the cutting edges will remove material.
Due to its additional cutting lips along the chisel edge, a
split point will begin cutting immediately. Up to 70% less
thrust (when compared to a non-split or conventional
point) is required to drill a hole with a split point.
Optional Step: Splitting the Point
Cause
The bit isn’t completely ground
yet.
Solution
Continue sharpening the bit until
the chisel is clean and straight.
If the machine quits removing
material before the chisel is
clean, re-align and sharpen again.
Problem
The Chisel Edge is not
clean or straight.
The entire surface from the Cut-
ting Edge to the Heel will have a
finely ground surface without
ridges or indentations. The Heel
will always be lower than the
Cutting Edge (positive relief).
Cause
Drill bit alignment.
Solution
Re-align the drill using the
Adjustable Alignment procedure
on page 18. To increase relief,
insert the Alignment Guide on
the Chuck closer to the (+) side of
the Alignment Port, then sharpen
the bit.
Problem
Insuffecient (negative)
relief or a slow cutting
drill bit.
Cause
Chuck is too loose or you are
using too much pressure when
sharpening.
Solution
Use more torque when tightening
the Chuck or less pressure when
sharpening. Clean the Chuck with
compressed air if the problem
persists.
Problem
Bit is backing out or
slipping out of the jaws
when you are sharpening.
Heel Cutting Edge
1.
Leave bit in chuck after
sharpening
Always align and sharpen a
bit before splitting it. To split
the point, do not remove the
bit from the Chuck after
sharpening.
2.
Align Guides
Align one of the Sharpening
Guides on the Chuck (short
white marks) with the Split-
ting Guide on the Splitting
Port. Port, making sure the
Alignment Guides insert into
the Split Point Guide
Rails in the Split-
ting Port.
Sharpening Guide
Split Point Guide Rails
Splitting Port
Splitting Guide