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Operation and Work Results
SYMPTOM
Lathe vibrates
1. Workpiece is unbalanced.
excessively.
2. Worn or broken gear present.
3. Chuck or faceplate has become unbalanced.
4. Spindle bearings at fault.
Cutting tool
1. Tool holder not tight enough.
vibrates exces-
2. Cutting tool sticks too far out of tool holder;
sively during cut-
lack of support.
ting.
3. Gibs are out of adjustment.
4. Dull cutting tool.
5. Incorrect spindle speed or feed rate.
Can't remove
1. Quill had not retracted all the way back into
tool from
the tailstock.
tailstock.
Cross slide, com-
1. Gibs are out of adjustment.
pound rest, or
2. Handwheel is loose.
carriage feed has
3. Lead screw mechanism worn or out of
lash.
adjustment.
Cross slide, com-
1. Gibs are loaded up with shavings or grime.
pound rest, or
carriage feed
2. Gib screws are too tight.
handwheel is
hard to move.
3. Backlash setting too tight (cross slide only).
4. Bedways are dry.
Bad surface fin-
1. Wrong RPM or feed rate.
ish.
2. Dull tooling or poor tool selection.
3. Too much play in gibs.
4. Tool too high.
Inaccurate turn-
1. Headstock and tailstock are not properly
ing results from
aligned with each other.
one end of the
workpiece to the
other.
Carriage won't
1. Gears are not all engaged or broken.
feed, or is hard
2. Gibs are too tight.
to move.
3. Loose screw on the feed handle.
4. Lead screw shear pin has sheared.
Troubleshooting
POSSIBLE CAUSE
-36-
Model M1099 (Mfg Since 8/07)
CORRECTIVE ACTION
1. Reinstall workpiece so it is centered.
2. Inspect gears and replace if necessary.
3. Rebalance chuck or faceplate; contact a local
machine shop for help.
4. Tighten or replace spindle bearings.
1. Check for debris, clean, and retighten.
2. Reinstall cutting tool so no more than 1/3 of the
total length is sticking out of tool holder.
3. Tighten gib screws at affected component.
4. Replace or re-sharpen cutting tool.
5. Use the recommended spindle speed.
1. Turn the quill handwheel until it forces taper out
of quill.
1. Tighten gib screw(s).
2. Tighten handwheel fasteners.
3. Tighten any loose fasteners on lead screw mecha-
nism.
1. Remove gibs, clean ways/dovetails, lubricate, and
readjust gibs.
2. Loosen gib screw(s) slightly, and lubricate
bedways.
3. Slightly loosen backlash setting by loosening the
locking screw and adjusting the spanner ring at
the end of the handle.
4. Lubricate bedways and handles.
1. Adjust RPM and feed rate.
2. Sharpen tooling or select a better tool for the
intended operation.
3. Tighten gibs.
4. Lower the tool position.
1. Realign the tailstock to the headstock spindle bore
center line.
1. Adjust gear positions or replace.
2. Loosen gib screw(s) slightly.
3. Tighten.
4. Correct for cause of shear pin breakage, and
replace shear pin.
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