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Lathe Operation (Cont.)
Symptom
Possible Cause
Cross slide,
1. Dovetail ways loaded with shavings, dust,
compound,
or grime.
or carriage
2. Gib screws are too tight.
handwheels hard to
move.
3. Backlash setting too tight.
4. Bedways are dry.
Cutting tool
1. Tool holder not tight enough.
or machine
2. Cutting tool sticks too far out of tool holder;
components vibrate
lack of support.
excessively during
3. Gibs are out of adjustment.
cutting.
4. Dull cutting tool.
5. Incorrect spindle speed or feed rate.
Workpiece is
1. Headstock and tailstock are not properly
tapered.
aligned with each other.
Chuck jaws will
1. Chips lodged in the jaws or scroll plate.
not move or do not
move easily.
Carriage will not
1. Gears are not all engaged.
feed or is hard to
2. Half-nut lever engaged.
move.
3. Loose screw on the feed handle.
4. Carriage lock is tightened down.
5. Chips have loaded up on bedways.
6. Bedways are dry and in need of lubrication.
7. Gibs are too tight.
8. Gears or shear pin broken.
Gear change levers
1. Gears not aligned inside headstock/Quick-
will not shift into
Change gearbox.
position.
-68-
Possible Solution
1. Remove gibs, clean ways, lubricate, and re-adjust
gibs.
2. Loosen gib screw(s) slightly (Page 70) and lubricate
bedways.
3. Slightly loosen backlash setting (Page 69).
4. Lubricate bedways/ball oilers (Page 63).
1. Check for debris, clean, and re-tighten.
2. Re-install cutting tool so no more than
length is sticking out of tool holder.
3. Adjust gibs at affected component (Page 70).
4. Replace or resharpen cutting tool.
5. Use the recommended spindle speed and feed rate.
1. Re-align the tailstock to the headstock spindle
centerline (Page 36).
1. Remove jaws, clean and lubricate scroll plate, then
replace jaws.
1. Adjust gear levers (Page 50).
2. Disengage half-nut lever (Page 52).
3. Tighten.
4. Check to make sure the carriage lock bolt is fully
released (Page 42).
5. Frequently clean away chips that load up during
turning operations.
6. Lubricate bedways/ball oilers (Page 63).
7. Loosen gibs screw(s) slightly (Page 70).
8. Replace gears or shear pin (Page 74).
1. Rotate spindle by hand with light pressure on the
lever until gear falls into place.
Model G0750GV (Mfd. Since 03/18)
⁄
of the total
1
3
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