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Trouble Probable Cause Remedy
Noisy operation. 1. Incorrect belt tension. 1. Adjust tension.
2. Dry spindle. 2. Lubricate spindle.
3. Loose spindle pulley. 3. Check tightness of retaining
nut on pulley.
4. Loose motor pulley. 4. Tighten set screws in pulleys.
Drill bit burns. 1. Incorrect speed. 1. Change speed.
2. Shavings not coming out of hole frequently to clear shavings. 2. Retract drill bit.
3. Dull drill bit. 3. Re-sharpen drill bit.
4. Feeding too slow. 4. Increase the speed.
5. Not lubricated. 5. Lubricate drill bit.
Drill bit wanders (hole not round). 1. Hard grain in wood or lengths of cutting lips and / or angles not equal 1.Re-sharpen drill bit correctly.
2. Bent drill bit. 2. Replace drill bit.
Wood splinters on underside. 1. No back up material under work piece. 1. Use back up material.
Workpiece moves when drilling. 1. Not supported or clamped properly. 1. Use drill press vice to support and
clamp work.
Drill bit binds in workpiece. 1. Workpiece pinching drill bit or excessive feed pressure. 1. Support workpiece or clamp it.
2. Improper belt tension 2. Adjust belt tension.
Excessive drill bit run out or wobble. 1. Bent drill bit. 1. Replace drill bit.
2. Worn spindle bearings. 2. Replace bearings.
3. Drill not properly installed in chuck. 3. Install drill bit correctly.
4. Chuck not properly installed. 4. Install chuck correctly.
Spindle returns too slowly or too quickly. 1. Spring has improper tension. 1. Adjust spring tension.
Spindle does not return to position. 1. Spring is broken. 1. Replace spring.
Chuck will not stay attached to spindle, 1. Dirt, grease or oil on the tapered inside surface of the chuck or on the 1. Using a household detergent clean the
it comes loose when trying to install it. spindle’s tapered surface. tapered surface of the chuck and spindle
to remove all dirt, grease and oil.
12. Troubleshooting
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