Backlash Adjustment - Grizzly G0824 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 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 6mm .............................................. 1
Hex Wrench 3mm .............................................. 1
Punch Pin 3mm ................................................ 1
Cross Slide Backlash
1. Feed cross slide toward front of machine until
it reaches the end of its travel.
2.
Remove the cap screw that secures the cross
slide leadscrew nut (see Figure 123).
Figure 123. 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 124.
Model G0824 (Mfd. Since 12/16)
Qty
Cap Screw Securing
Leadscrew Nut to
Cross Slide
Backlash
Adjustment
Cap Screw
Figure 124. Leadscrew nut.
4. Tighten backlash adjustment cap screw
shown in Figure 124 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 the 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 screw on compound slide face-
plate several turns (see Figure 125).
Figure 125. Compound slide backlash
adjustments.
3.
Use a 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 screw.
5.
Repeat adjustments above if necessary.
Leadscrew Nut
Set
Screw
-75-