105-0717-006 18
Troubleshooting Guide
Problem
Possible Cause and Solution
1. Chuck jams
when partially
threaded onto
spindle.
Check chuck body threads are free from damage.
Check spindle has engaged with chuck body
thread correctly. See 'Fitting to Chuck' Page 7.
Make sure the grub screw has not been
SCREWED IN.
2. Chuck body
appears not to
be true
Check insert is properly home in chuck body.
Check that the insert is correctly screwed onto
lathe spindle. Insert must back against accurate
face/register or bearing on lathe spindle. See Page
7.
3. Add on jaws
do not run true
Check jaws are mounted correctly on jaw slides.
For method see Page 9. For accuracy parameters
see Page 2. When the jaws are expanded beyond
a 50mm circle they will appear to be running out
but in fact are maintaining concentricity. Always
evaluate runout from turned wood clamped in jaws
4. Jaw Slides
closed to centre
and No. 1 slide
stays in centre
when jaws are
expanded again
Jaw Slide(s) have over travelled from scroll. It will
be necessary to tap back No 1 jaw slide until it has
re-engaged. See page 8 for 'insertion of jaw slide'.
5. Chuck very
stiff to operate or
jammed
Wood dust and shavings can clog the chuck in use.
The chuck should be cleaned. Follow instruction
Page 7
6. Jaw Slides
when Wound to
centre do not
meet
Slides have not engaged sequentially in clockwise
order with scroll - 1-2-3-4. Jaw Slides could have
been inserted out of order. Check insertion
procedure Page 8.
7. When chuck is
being removed
from spindle the
body unwinds
from insert
Either lock insert in body using grub screw and
fibre washer provided or use spanner on the insert
to wind chuck off lathe.
