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IX. Troubleshooting
25
PROBLEM
Noisy operation.
The drill bit burns or
smokes.
Excessive drill run-out
or wobble, drilled hole
is not round.
Drill bit binds in the
workpiece.
Spindle returns too
slowly or too quickly.
Chuck falls off spindle.
PROBABLE CAUSE
1.
Incorrect belt tension.
2.
Dry spindle.
3.
Loose spindle pulley.
4.
Loose motor pulley.
1.
Drilling at the incorrect
speed.
2.
The wood chips are not
coming out of the hole.
3.
Dull drill bit.
4.
Feeding the workpiece too
slowly.
5.
Not lubricated.
1.
Bent drill bit.
2.
Bit improperly installed in the
chuck.
3.
Worn spindle bearings.
4.
Lengths of cutting flutes or
angles not appropriate for
the hardness of the wood
grain.
5.
Chuck not properly installed.
1.
The workpiece is pinching
the bit.
2.
Excessive feed pressure.
1.
Spring has improper tension.
1.
Dirt, grease, or oil on the
tapered surface on the
spindle or in the chuck.
REMEDY
• Adjust the belt tension. See "To replace the
belt" in ADJUSTMENTS.
• Lubricate the spindle. See MAINTENANCE
section.
• Tighten the retaining nut on the pulley insert.
• Tighten the set screw on the side of the motor
pulley.
• Change the speed. See "Variable speed" in
OPERATION.
• Retract the drill bit frequently to clear
the chips.
• Resharpen or replace the drill bit.
• Feed fast enough to cut the workpiece. See
"To drill a hole" in OPERATION.
• Lubricate the drill bit with cutting oil or motor
oil.
• Replace the drill bit.
• Reinstall the bit. See "To install drill bits" in
ADJUSTMENTS.
• Replace bearings. Take to a qualified
service technician.
• Resharpen the drill bit correctly or replace
with the appropriate type.
• Reinstall the chuck. See "To install the chuck"
in ASSEMBLY.
• Support or clamp the workpiece. See "Position
the table and workpiece" in OPERATION.
• Feed more slowly. See "Feeding the drill bit"
in OPERATION.
• Adjust the spring tension. See "Spindle return
spring" in ADJUSTMENTS.
• Clean the tapered surface of both the chuck
and the spindle with a household detergent.
See "To install the chuck" in ASSEMBLY.