Adjusting Spindle Bearing Preload - Grizzly G0782 Owner's Manual

Adjusting Spindle
Bearing Preload
This lathe is shipped from the factory with the
spindle bearing preload set. If the spindle ever
develops end-play and the workpiece finish suf-
fers, you can re-establish the bearing preload,
remove the end-play, and correct the workpiece
finish issue.
Items Needed
Hook-Style Spanner Wrench 68-75mm ............. 1
Dial Indicator w/Magnetic Base ......................... 1
Heavy Dead Blow Hammer ............................... 1
Wooden Block ................................................... 1
Adjusting Preload
1. Run lathe for 20 minutes on high speed to
bring lathe to normal operating temperature.
2. DISCONNECT MACHINE FROM POWER!
3. Remove chuck (refer to Chuck Removal on
Page 31), then use feed direction lever to shift
spindle to neutral (see Figure 77 on Page
52) and remove end gear cover to access
outboard end of spindle (see Figure 134).
Outboard
End of
Spindle
Figure 134. End gear cover removed to access
outboard end of spindle.
-80-
4.
Place chuck wrench in camlock socket to
keep spindle from rotating, and loosen outer
spanner nut two turns (see Figure 135).
Qty
Figure 135. Example of spindle spanner nuts.
5. Loosen inner spanner nut one turn.
Note: You may have to tap outboard end of
spindle as explained in Step 6, to help unload
spindle and break spanner nut loose.
For the next step, DO NOT strike wood
block with excessive force. If you do, you
can cause tapered roller bearings to indent
mating races. If this damage occurs, one
or more spindle bearings will have to be
replaced, as this damage will generate
vibration at higher spindle speeds.
Outer
Spanner
Nut
NOTICE
Model G0782 (Mfd. Since 10/15)
Inner
Spanner
Nut