Grizzly G0709 Owner's Manual: Backlash Adjustment

14" x 40" gunsmithing lathe.
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backlash Adjustment

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.
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 6mm .............................................. 1
hex Wrench 5mm .............................................. 1
To adjust the cross slide backlash:
1.
Feed the cross slide backwards (toward the
front of the machine) until it reaches the end
of its travel.
2.
remove the cap screw that secures the cross
slide leadscrew nut (see figure 101).
figure 101. location of cap screw that secures
the leadscrew nut.
Model G0709 (Mfg. Since 5/11)
Qty
Cap screw securing
leadscrew nut to
top slide
3.
rotate the cross slide handle clockwise to
feed the leadscrew nut out from under the
cross slide, as shown in figure 102.
leadscrew nut
figure 102. leadscrew nut.
4.
tighten the backlash adjustment cap screw
shown in figure 102 in small increments.
5.
hold the leadscrew nut and test after each
adjustment by rotating the handwheel back-
and-forth until the backlash amount is accept-
able.
6.
Feed the leadscrew nut back under the cross
slide and replace the cap screw removed in
Step 2.
Backlash
Adjustment
Cap screw
-63-

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