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Operation and Work Results
symptom
entire
machine
1. Workpiece is unbalanced.
vibrates
exces-
sively upon start-
2. loose or damaged belt(s).
up and while run-
3. V-belt pulleys are not properly aligned.
ning.
4. Worn or broken gear present.
5. Chuck or faceplate has become unbalanced.
6. spindle bearings badly worn.
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.
Can't
remove
1. Quill had not retracted all the way back into the
tapered tool from
tailstock.
tailstock quill.
2.
debris was not removed from taper before
inserting into quill.
Cross slide, com-
1. gibs are out of adjustment.
pound slide, or
2. handwheel is loose.
carriage feed has
3. lead screw mechanism worn or out of adjust-
sloppy operation.
ment.
Cross slide, com-
1. gibs are loaded up with shavings, dust, or
pound slide, or
grime.
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.
Cutting tool or
1. tool holder not tight enough.
machine
com-
2. Cutting tool sticks too far out of tool holder;
ponents vibrate
lack of support.
excessively dur-
3. gibs are out of adjustment.
ing cutting.
4. dull cutting tool.
5. incorrect spindle speed or feed rate.
inaccurate turn-
1. headstock and tailstock are not properly
ing results from
aligned with each other.
one end of the
workpiece to the
other.
Chuck jaws won't
1. Chips lodged in the jaws.
move
or
don't
move easily.
Carriage
won't
1. gears are not all engaged.
feed.
2. gears are broken.
3. loose screw on the feed handle.
-50-
possible Cause
possible solution
1. reinstall workpiece so it is as centered with the
spindle bore as possible.
2. tighten/replace the belt as necessary.
3. Align the V-belt pulleys.
4. inspect gears and replace if necessary.
5. rebalance chuck or faceplate; contact a local
machine shop for help.
6. replace spindle bearings.
1. Adjust for appropriate rpM and feed rate.
2. sharpen tooling or select a better tool for the intend-
ed operation.
3. tighten gibs.
4. lower the tool position.
1. turn the quill handwheel until it forces taper out of
quill.
2. Always make sure that taper surfaces are clean.
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)
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. Check for debris, clean, and retighten.
2. reinstall cutting tool so no more than
length is sticking out of tool holder.
3. tighten gib screws at affected component.
4. replace or resharpen cutting tool.
5. use the recommended spindle speed.
1. realign the tailstock to the headstock spindle bore
center line.
1. remove jaws, clean and lubricate chuck threads,
and replace jaws.
1. Adjust gear positions.
2. replace.
3. tighten.
g0554 gear-head Floor lathe
slightly,
and
lubricate
/
of the total
1
3
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