Bearing Preload - Grizzly g4003g Owner's Manual

Saddle Gib and Saddle Lock, see Figure 51
the saddle is supplied with a square head bolt
on the front right hand side of the slide. this bolt
is used to lock the saddle in place for increased
rigidity when making face cuts. Before making
adjustments to the saddle gib, make sure that this
bolt is loose by turning it counter clockwise.
it is important that the gib be properly adjusted.
A loose gib will cause finish problems in a
workpiece. A gib adjusted too tightly will cause
premature wear.
saddle lock
Bolt
figure 51. saddle lock bolt.
the gib for the saddle is located on the bottom of
the back edge of the slide (figure 51). the tension
on this gib is maintained by four set screws with
jam nuts. By loosening the jam nuts and tighten-
ing the set screws, the gib will tighten. loosening
the set screws will loosen the gib. the gib strip is
properly adjusted when a slight drag is detected
while moving the apron. do not over tighten.
it is important the four set screws are tightened
evenly. When tightening the jam nuts, hold the set
screw in position with a hex wrench.
Model g4003g (Mfg. since 4/08)

bearing preload

this lathe is shipped from the factory with the
spindle bearing preload adjusted. if the spindle
ever develops a bit of end-play and the workpiece
finish suffers, you can adjust the bearing pre-
load to remove the end-play and improve the
workpiece finish.
Adjusting the bearing preload requires using a
spanner wrench or a punch and hammer. you can
either purchase the spanner wrench at a tool store
or fabricate one, using the diagram shown below
in figure 52.
figure 52. spanner wrench diagram.
to adjust the preload:
1.
run the lathe for 20 minutes on high speed to
bring the lathe to a normal temperature.
2.
disConnECt thE lAthE froM thE
poWEr sourCE!
3. remove the chuck, shift the spindle to neu-
tral, then remove the outboard spindle cover
(figure 53).
figure 53. outboard spindle cover.
outboard
spindle
Cover
-41-