Use and Care Manual

4212 WENPRODUCTS.COM
20
T r oubleshooting
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.
• 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.