Bearing Preload - Grizzly G0949G Owner's Manual

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
in Figure 116.
Fabricate pin to / " D x
7
32
Figure 116. Spanner wrench diagram.
Tools Needed
Spanner Wrench 1 ⁄ " ....................................... 1
3
16
Chuck Key ......................................................... 1
Dead Blow Hammer .......................................... 1
Piece of Scrap Wood 2"x 2" x 6" ....................... 1
Dial Indicator ..................................................... 1
Hex Wrench 6mm .............................................. 1
To adjust bearing preload:
1. Run lathe for 20 minutes at high speed to
bring lathe to normal operating temperature.
2. DISCONNECT MACHINE FROM POWER!
3. Remove end gear cover.
Model G0949G (Mfd. Since 01/22)
Fabricate from CRS
or HRS bar stock
/ " L and weld.
1
4
Qty
4. Remove chuck (see Page 33), then shift spin-
dle to neutral by moving FWD/REV switch to
"0" (see Figure 115 on Page 74).
5. Place chuck key in cam-lock socket and keep
spindle from rotating.
6.
Using a spanner wrench, or hammer and
punch, rotate outer spanner nut (see
Figure 117) counterclockwise and remove it.
Figure 117. Loosening outer spanner nut.
7. Loosen inner spanner nut one turn.
Note: You may have to tap on the outboard
end of the spindle as explained in Step 8
on Page 76, to help unload the spindle and
break the spanner nut loose.
Outer
Spanner
Nut
-75-