-47-
Model M1112 (For Machines Mfd. Since 12/20)
SE
RV
IC
E
Figure
66
.
Outboard spindle cover.
Outboard Spindle Cover
Figure
65
.
Spanner wrench diagram.
Spindle Bearing Preload
Figure
67
.
Loosening outboard spindle
nut.
Outboard Spindle Nut
To adjust the preload, do these steps:
1.
Run the lathe for 20 minutes on high speed to bring
the headstock to a normal temperature.
2.
DISCONNECT THE LATHE FROM POWER!
3.
Remove the chuck, shift the spindle to neutral, then
remove the outboard spindle cover (
Figure
66).
4.
Place the chuck key in the cam-lock socket and keep
the spindle from rotating.
5.
Using a spanner wrench or hammer-and-punch,
loosen the outer spanner lock nut (
Figure
67) by
turning it counterclockwise, then remove it.
6.
Loosen the inner spanner nut one turn.
Note:
You may have to tap on the outboard spindle
tube as explained in
Step 7
to help unload the
spindle and break the spanner nut loose.
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 preload 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
65.
Fabricate from CRS or HRS Bar Stock
Fabricate Pin to
7
⁄
32
"D x
1
⁄
4
"L and Then Weld.
1
9
⁄
16
" Radius
12"