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Operation (Cont.)
Symptom
Possible Cause
Drill bit drifts.
1. Dull/incorrectly sharpened drill bit.
2. Tool/bit/chuck incorrectly installed.
Drill bit slips in
1. Chuck jaws loose.
chuck or stuck
2. Workpiece squeezing drill bit.
in workpiece.
3. Feed rate too fast.
4. Spindle speed/feed rate to slow.
Workpiece
1. Workpiece not secure.
thrown from
2. Tool/bit too large for feed speed.
table.
Excessive
1. Debris on chuck, arbor, or in spindle taper.
runout or
wobbling in
chuck/drill bit.
2. Tool/bit bent.
3. Tool/bit installed incorrectly.
4. Spindle bearings worn.
Backside of
1. Scrap board not installed between table and
workpiece
workpiece.
splinters.
Model T33901/T33902 (Mfd. Since 07/23)
Possible Solution
1. Correctly sharpen drill bit.
2. Correctly install tool/bit (Page 29)/chuck
(Page 21).
1. Tighten chuck jaws.
2. Properly clamp workpiece on table or in vise.
3. Decrease feed rate.
4. Increase spindle speed (Page 28)/feed rate.
1. Properly clamp workpiece in table or in vise.
2. Use smaller tool/bit or decrease feed speed.
1. Remove chuck and arbor, clean chuck, arbor, and
spindle taper, then re-install (Page 25). Deburr
mating surfaces, if necessary.
2. Replace with straight tool/bit.
3. Install tool/bit correctly (Page 29) or replace.
4. Replace spindle bearings.
1. Install scrap board between table and workpiece.
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