Grizzly G9249 - Manual (Page 25)

g9249 12" x 37" Belt drive gap Bed lathe
-23-
5. lightly tap the breaker bar with the dead blow
hammer to loosen the chuck or faceplate
counterclockwise from the spindle threads.
— if removing a chuck, open the jaws and
slide the breaker bar between the jaws, as
shown in
figure 24.
— if removing the faceplate, mount clamps on
the faceplate and use the breaker bar in a
similar manner.
figure 24. loosening the chuck from the spindle
threads.
spindle Clamps
6. Carefully unthread and remove the chuck or
faceplate counterclockwise from the spindle
threads.
Mounting a chuck or faceplate
1. disConneCt lAthe FroM poWer!
2. lay a chuck cradle or a layer of plywood over
the bedways to reduce the risk of injury and
to protect the precision ground surfaces of
the bedways.
3. Clean debris from the threads of the spindle
and chuck or faceplate, then apply a thin film
of light machine oil.
4. Carefully and slowly rotate the chuck or face-
plate clockwise onto the spindle until you feel
resistance.
5. rotate the chuck or faceplate counterclock-
wise a 1 ⁄
4
turn, then quickly rotate it back
clockwise to seat the threads.
Note: Attempting to overtighten the chuck
or faceplate will make removal difficult and
could damage the threads.
6. Firmly install both spindle clamps on the back
of the chuck or faceplate.
Note: Make sure the spindle clamp tangs
properly fit into the spindle groove before
tightening the set screw (see
Figure 22).
7. remove the chuck cradle or plywood and any
tools used before starting the lathe.
Make sure the chuck or
faceplate is firmly secure
on the spindle and remove
the chuck key. Object
thrown from the lathe
could cause serious per-
sonal injury or death to
the operator or bystand-
ers.
Mounting a
Workpiece
typically, a workpiece is mounted in a 3-jaw
chuck, a 4-jaw chuck, a faceplate, or between
centers. there are, however, numerous other
methods of workpiece mounting for a lathe that
are beyond the scope of this manual. Whichever
work-holding device you use, make sure that the
workpiece is held firmly and centered to ensure
safe and accurate operation.