For Machines Mfg. Since 7/09 | S E R V I C E | Model SB1016/SB1036 |
Backlash Adjustment
Backlash is the amount of free play felt while switching rotation directions with the handwheel. This can be adjusted on the compound and cross slide leadscrews. Before beginning any adjustment, make sure that all associated components have been cleaned and
Reducing backlash to less than 0.001" is impractical. Avoid the temptation to overtighten the backlash set screw while adjusting. Overtightening leads to accelerated wear of the wedge, nut, and leadscrew.
Compound Leadscrew |
|
Tools Needed: | Qty |
Hex Wrench 4mm | 1 |
Backlash is adjusted by tightening the set screws shown in Figure 135. When these screws are- adjusted against the leadscrew nut, they offset part of the nut to remove play between the nut and leadscrew.
If you end up adjusting the nut too tight, loosen the set screws, tap the compound a few times with a rubber or wooden mallet, and turn the handle slowly back and forth until it moves freely.
To readjust the backlash, rock the handle back and forth, and tighten the screws slowly until the backlash is at approximately 0.001" as indicated on the handwheel dial.
Set Screws
Figure 135. Compound slide backlash adjustment
screws.
Cross Slide Leadscrew |
|
Tools Needed: | Qty |
Hex Wrench 3mm | 1 |
Hex Wrench 6mm | 1 |
Backlash is adjusted by loosening all four cap screws shown in Figure 136, and then tightening the center set screw, which pushes down on a wedge and forces the nut apart, taking up lash in the nut and leadscrew.
If you end up adjusting the nut too tight, loosen the set screw, tap the cross slide a few times with a rubber or wooden mallet, and turn the handle slowly
To
Cap Screw
Set
Screw
