Bearing Preload - Grizzly G0750GV 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 131.
Fabricate pin to / " D x
7
32
Figure 131. Spanner wrench diagram.
Items Needed
Spanner Wrench (see Figure 131) .................... 1
Chuck Key ......................................................... 1
Dead-Blow Hammer .......................................... 1
Wooden Block ................................................... 1
Dial Indicator ..................................................... 1
Hex Wrench 6mm .............................................. 1
To adjust the preload:
1. Run lathe for 20 minutes on high speed to
bring lathe to normal temperature.
2. DISCONNECT MACHINE FROM POWER!
Model G0750GV (Mfd. Since 03/18)
Fabricate from CRS
or HRS bar stock
/ " L and weld.
1
4
Qty
3. Remove chuck (see Page 30), then shift spin-
dle to neutral by positioning spindle speed
range lever and headstock feed direction
lever in middle positions (see Figure 132).
Spindle
Speed
Range
Lever
Figure 132. Spindle speed range lever and
headstock feed direction lever set to neutral.
4.
Remove end gear cover, then remove out-
board spindle cover (see Figure 133).
Figure 133. Outboard spindle cover.
5.
Place chuck key in cam-lock socket and keep
spindle from rotating.
6.
Using a spanner wrench, or hammer and
punch, loosen outer spanner nut (see Figure
134) counterclockwise and remove it.
Figure 134. Loosening outer spanner nut.
Headstock Feed
Direction Lever
Outboard
Spindle
Cover
Outer
Spanner
Nut
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