Backlash Adjustment - Grizzly G0750GV Owner's Manual

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 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.
Items Needed
Hex Wrench 6mm .............................................. 1
Hex Wrench 5mm .............................................. 1
Punch Pin 2mm ................................................ 1
Cross Slide Backlash
1. Feed cross slide toward front of machine until
it reaches end of its travel.
2.
Remove cap screw that secures cross slide
leadscrew nut (see Figure 115).
Figure 115. Location of cap screw that secures
the leadscrew nut.
3. Rotate cross slide handle clockwise to feed
leadscrew nut out from under cross slide, as
shown in Figure 116.
Model G0750GV (Mfd. Since 03/18)
Qty
Cap Screw Securing
Leadscrew Nut
to Cross Slide
Leadscrew Nut
Figure 116. Leadscrew nut location and
adjustment.
4.
Tighten backlash adjustment cap screw
shown in Figure 116 in small increments.
5.
Hold leadscrew nut and test after each
adjustment by rotating handwheel back and
forth until backlash amount is acceptable.
6.
Feed leadscrew nut back under cross slide
and replace cap screw removed in Step 2.
Compound Slide Backlash
1.
Turn compound slide handwheel counter-
clockwise several turns.
2.
Loosen set screws on compound slide face-
plate several turns (see Figure 117).
Faceplate
Figure 117. Compound slide backlash
adjustments.
3. Use punch pin to loosen faceplate and turn
it until backlash is approximately 0.002"–
0.003", as indicated on graduated dial.
4. Secure setting with set screws.
5. Repeat adjustments above if necessary.
Backlash
Adjustment
Cap Screw
Set
Screws
-69-