Split Points - DRILL DOCTOR 750X Guia Del Usuario

Problem
Insuffecient (Negative)
relief or a slow cutting
drill bit.
Cutting Edge
Heel
Relief Angle
Problem
Bit backing out or
slipping out of the
jaws when you are
sharpening

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.
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Cause
Drill bit alignment.
Solution
Re-align the drill using the
Adjustable Alignment proce-
dure on page 19. To increase
relief, insert the alignment
guide on the chuck closer to
the (+) side of the alignment
port, then sharpen the bit.
Cause
Chuck too loose or too much
pressure when sharpening.
Solution
Use more torque when tight-
ening the Chuck or less pres-
sure when sharpening. Clean
the Chuck w/ compressed air
if the problem persists.
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