Model G0824 (Mfd. Since 12/16)
-73-
Lathe Operation
Symptom Possible Cause Possible Solution
Entire machine
vibrates upon
startup and while
running.
1. Workpiece is unbalanced.
2. Workpiece is hitting stationary object.
3. Loose or damaged V-belt(s).
4. V-belt pulleys not properly aligned.
5. Chuck or faceplate is unbalanced.
6. Gears not aligned in headstock or no
backlash.
7. Worn/broken gear or bad bearing.
8. Spindle bearings at fault.
1. Re-install workpiece as centered with the spindle
bore as possible.
2. Stop lathe immediately and correct interference
problem.
3. Re-tension/replace V-belt(s) as necessary
(Page 79).
4. Align V-belt pulleys.
5. Rebalance chuck or faceplate; contact a local
machine shop for help.
6. Adjust end gears and establish backlash (Page 52).
7. Replace broken gear or bearing.
8. Reset spindle bearing preload (Page 83) or replace
worn spindle bearings.
Bad surface finish.
1. Incorrect spindle speed or feed rate.
2. Dull tooling or wrong tool selection.
3. Workpiece is flexing.
4. Excessive play in gibs.
5. Material building up on cutting tool.
6. Bearing preload needs to be adjusted.
7. Belts are bad.
8. Spindle bearings are bad.
1. Use correct spindle speed (Page 48) and feed rate
(Page 49).
2. Sharpen tooling; use correct tool for operation.
3. Change setup to properly support workpiece.
4. Tighten gibs (Page 77).
5. Use coolant on tool and workpiece during operation.
6. Adjust bearing preload (Page 83).
7. Replace belts (Page 79).
8. Change spindle bearings.
Tapered tool difficult
to remove from
tailstock quill.
1. Quill not fully retracted into tailstock.
2. Debris not removed from tool taper before
inserting into quill.
1. Rotate quill handwheel until it forces tapered tool
out of quill.
2. Remove quill from tailstock and drive tool out with a
punch. Carefully deburr bore of quill.
Cross slide,
compound rest, or
carriage feed has
sloppy operation.
1. Gibs are out of adjustment.
2. Handwheel has excessive backlash.
3. Leadscrew mechanism is worn or out of
adjustment.
1. Adjust gibs (Page 77).
2. Tighten handwheel fasteners or adjust handwheel
backlash to a minimum (Page 75).
3. Adjust leadscrew to remove end play.
Cross slide,
compound,
or carriage
handwheels hard to
move.
1. Bedways are dry and in need of lubricant.
2. Ways are loaded with shavings, dust, or
grime.
3. Gibs are too tight.
4. Backlash setting is too tight.
1. Lubricate bedways/ball oilers (Page 66).
2. Remove gibs, clean ways, lubricate, re-install, and
re-adjust.
3. Loosen gibs slightly (Page 77), and lubricate
bedways.
4. Slightly loosen backlash setting (Page 75).
Cutting tool
or machine
components vibrate
excessively during
cutting.
1. Tool holder is not tight enough.
2. Cutting tool sticks too far out of tool holder;
lacks support.
3. Workpiece is deflecting.
4. Workpiece is unbalanced.
5. Gibs are out of adjustment.
6. Cutting tool is dull.
7. Spindle speed or feed rate is incorrect.
1. Tighten tool holder.
2. Re-install cutting tool so no more than
1
⁄3 of total
length is sticking out of tool holder.
3. Use steady or follow rest (Page 42).
4. Balance workpiece.
5. Adjust gibs (Page 77).
6. Replace or resharpen cutting tool.
7. Use recommended spindle speed (Page 48), and
feed rate (Page 49).
To Next Page
Loading...
Need help?
General
