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XII. TROUBLE SHOOTING
WARNING: For your own safety, turn switch off and disconnect power source
before troubleshooting.
Trouble
Probable Cause
Remedy
Noisy operation.
1. Incorrect belt tension.
1. Adjust tension.
2. Dry spindle.
2. Lubricate spindle.
See lubrication section.
3. Loose spindle pulley or
3. Tighten setscrews in
motor pulley.
pulley.
Bit bums or smokes.
1. incorrect speed.
1
.
Select correct speed.
See speed chart.
2. Chips clogging hole.
2. Retract bit frequently
to clear chips.
3. Dull bit.
3. Sharpen or replace bit.
4. Feeding too slow.
4. Increase feed rate.
5. Bit not lubricated.
5. Lubricate bit.
6. Bit running backwards.
6. Check motor rotation.
Excessive drill
1. Bent bit.
1. Replace bit.
runout or wobble.
2. Worn spindle bearings.
2. Replace bearings.
3. Bit improperly installed
3. Install bit properly.
in chuck.
4. Chuck improperly installed.
4. Install chuck properly.
Drill binds in workpiece.
1. Workpiece pinching bit or
1
.
Support or damp
excessive feed pressure.
workpiece.
2. Improper belt tension.
2. Adjust belt tension.
Workpiece tom
1. Not supported or
1. Support or damp
loose from hand.
clamped properly.
workpiece.
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