-58-
Model g0554z (Mfg 01/09+)
cross Slide
backlash Adjustment
Backlash is the amount of play in a leadscrew. it
is felt when turning the handwheel in one direc-
tion, then turning it in the other direction. the
distance the handwheel moves without moving
the leadscrew or the attached component is the
backlash.
When adjusting the backlash, the goal is to remove
excess backlash without making the cross slide
bind, making it hard to move. overtightening will
cause excessive wear on the sliding surfaces and
the leadscrew. generally, a backlash of 0.003"–
0.006" is acceptable.
Tools Needed
Qty
hex Wrench 5mm .............................................. 1
To remove excess cross slide backlash:
1. disConnECt lAthE FroM poWEr!
2. the cap screw shown in Figure 85 secures
the cross slide to the leadscrew nut. remove
this cap screw, then remove the cross slide.
Figure 85. Cross slide backlash adjustment cap
screw.
Cap screw
3. tighten or loosen the cap screw in the front
of the leadscrew nut to adjust the backlash
(refer to
part Reference Number 520 on
page 84 for the location of this cap screw).
4. repeat Step 3 until you are satisfied with
cross slide backlash, then re-install the cross
slide.
Gib Adjustments
the Model g0554z has four gib adjustments: the
cross slide gib, the compound gib, the saddle gib,
and the tailstock gib.
When adjusting gibs, the goal is to remove unnec-
essary sloppiness from the movement of the slid-
ing surfaces without causing them to bind. loose
gibs may cause poor finishes on the workpiece
due to chatter, and overtightening them will cause
premature wear of the sliding surfaces.
Tools Needed
Qty
Flat head screwdriver #2 .................................. 1
Wrench or socket 10mm ................................... 1
hex Wrench 3mm .............................................. 1
cross and compound Slide Gibs
these gibs are wedge-shaped bars that, depend-
ing on which direction they are moved by the gib
screws, either increase or decrease the pressure
between the gib and the ways.
Figures 86–87
show the gib components for the cross and com-
pound slides.
Figure 86. Cross and compound slide rear gib
screws.
rear gib screws
Figure 87. Front gib screws.
Front gib
screws
