Adjusting Backlash - Grizzly G0782 Owner's Manual

Adjusting Backlash

Backlash is the amount of play in a leadscrew
and can be felt as the free play in a handwheel
when changing direction of rotation. The amount
of the backlash can be viewed on the handwheel
micrometer-collar graduated dial.
When adjusting backlash, tighten the components
enough to remove backlash, but not so much that
the components bind the leadscrew, making it
hard to turn. Overtightening will cause excessive
wear to the sliding block and leadscrew.
Tools Needed
Hex Wrench 5mm .............................................. 1
Hex Wrench 6mm .............................................. 1
To adjust cross slide backlash:
1.
Feed cross slide toward back of machine until
it reaches end of its travel.
2.
Remove back splash, then remove cap screws
and leadscrew cover to access leadscrew nut
(see Figure 121).
Leadscrew Cover
Cap Screws that
Secure Leadscrew
Figure 121. Back splash removed to access
cross slide leadscrew cover.
-74-
Qty
Cover
3.
Remove cap screw that secures cross slide
leadscrew nut (see Figure 122).
Figure 122. Location of cap screw on typical
cross slide that secures leadscrew nut.
4. Rotate cross slide handwheel to feed
leadscrew nut out from under cross slide, as
shown in Figure 123.
Leadscrew Nut
Backlash Adjustment
Figure 123. Leadscrew nut access.
5. Tighten backlash adjustment cap screw
shown in Figure 123 in small increments.
6. Test after each adjustment by rotating
handwheel back-and-forth until backlash
amount is acceptable.
7.
Feed leadscrew nut back under cross slide
and replace cap screw removed in Step 3.
8. Re-install leadscrew cover and back splash.
Model G0782 (Mfd. Since 10/15)
Cap Screw Securing
Leadscrew Nut
Cap Screw