Grizzly G9972Z Owner's Manual page 49

Operations
symptom possible Cause
Bad surface finish. 1. incorrect spindle speed or feed rate.
2. dull tool or poor tool selection.
3. too much play in gibs.
4. tool too high.
Cannot remove 1. Quill not retracted all the way back into the
tapered tool from
tailstock.
tailstock quill.
2. debris/oil not removed from tapered mating
surfaces before inserting into quill.
gear(s) will not line 1. gear(s) not aligned in headstock.
up and mesh.
Cut ting tool 1. tool holder not tight enough.
or m ac hin e
2. Cutting tool too far out from holder; lack of
components vibrate
support.
excessively during
3. too much play in gibs.
cutting.
4. Cutting tool is dull.
5. incorrect spindle speed or feed rate.
C r o s s /c o m p o u n d 1. too much play in gibs.
slide or carriage
2. handwheel(s) loose.
feed has sloppy
3. too much leadscrew backlash (cross slide
operation.
only).
4. Leadscrew mechanism worn or out of
adjustment.
C r o s s /c o m p o u n d 1. gibs are loaded up with chips/grime.
slide or carriage
feed hard to move.
2. gibs are too tight.
3. Leadscrew backlash setting too tight (cross
slide only).
4. Bedways are dirty/dry.
5. gearing is at fault.
inaccurate turning 1. tailstock
results from one end
headstock.
of workpiece to the
other.
Chuck jaws will 1. Chips/debris lodged in jaws.
not move or do not
move easily.
tailstock quill will not 1. Quill lock is tightened down.
feed out of tailstock.
G9972Z 11" x 26" Lathe w/Gearbox
not properly aligned with
possible solution
1. adjust for proper spindle speed and feed rate
(pages 29–32).
2. Use sharp tools; use correct tool for the operation.
3. adjust gibs (page 49).
4. Lower tool position.
1. rotate the quill handwheel until the tapered tool is
forced out of quill.
2. always make sure that tapered mating surfaces are
clean before inserting.
1. rotate spindle by hand until gear(s) falls into place.
1. Check for debris, clean, and re-tighten.
2. re-install cutting tool with no more than
length is sticking out of tool holder.
3. adjust gibs (page 49).
4. sharpen/replace.
5. adjust for proper spindle speed and feed rate
(pages 29–32).
1. adjust gibs (page 49).
2. tighten handwheel fasteners.
3. adjust leadscrew backlash (page 48).
4. tighten any loose fasteners
mechanisms; check for excessive wear/replace if
necessary.
1. remove gibs, clean ways, lubricate, and properly
adjust gibs (page 49).
2. adjust gibs (page 49).
3. properly adjust cross slide leadscrew backlash
(page 48).
4. Clean and lubricate bedways.
5. inspect/replace gearing.
1. properly align tailstock with headstock (page 24).
1. remove jaws, clean and lubricate jaws, scroll-gear
threads, and chuck, then replace jaws.
1. turn quill lock counterclockwise to loosen.
⁄ of total
1
3
on leadscrew
-47-