Southbend SB1231 - Manual (Page 7)

Jaw screw retaining pin
Set screw
a
Figure 10. Chuck sequence of disassembly.
Care & Maintenance
Always disconnect
machine from power before
performing maintenance or
serious personal injury may
result.
!
b. Back the jaws out of the chuck
c. Remove the four set screws.
d. Put on safety glasses, and use a hammer
and drift punch to tap out each jaw screw
retaining pin.
e. Slide the jaw screws out of their bores.
4. Using mineral spirits, clean and dry all
parts. Inspect and fix all bores, teeth, pins,
and mating surfaces for wear, burrs, galling,
rust, or cracks.
5. Without changing the dimension of any part,
use a wire brush, emery cloth, or dressing
stones to remove all rust, burrs, or any high
spots caused by galling.
6. Coat all parts with any automotive NLGI #2
grease, and carefully re-assemble the chuck
in the reverse order shown in Figure 10.
7. Rotate the chuck key clockwise until the
lead thread of each jaw screw is seen just
entering the jaw guide, then insert each
numbered jaw into its numbered slot.
8. One at a time, hold each jaw against its jaw
screw, and rotate the chuck key clockwise to
engage the jaw screw with the jaw, then fully
thread the jaw into the chuck.
9. Align and re-install the chuck.
For optimum performance from your chuck,
follow the maintenance schedule below. Never
hammer on the chuck, jaws, or a workpiece that
is clamped in the chuck; and never subject the
chuck to abrasives, flame, or water.
Daily:
• Check/correct loose mounting bolts.
• Keep the chuck clean and oiled.
• Use a vacuum, rag, or brush to clean the
chuck after use. Never use air pressure to
clean chips away from a chuck.
• Avoid leaving the chuck clamped on a
workpiece, unload the chuck jaws daily.
• Make sure the chuck key is removed from
the chuck when not in use.
If the chuck ever becomes stiff to operate,
it may have been contaminated with metal
chips or abrasives from incorrect or infrequent
maintenance intervals. If this is the case, the
chuck must be disassembled, cleaned, and re-
lubricated.
To disassemble the chuck for a full cleaning
and lubrication service:
1. DISCONNECT LATHE FROM POWER!
2. Verify that chuck alignment marks are
present so the chuck can be re-installed in
the same position, and remove the chuck.
Stamp the marks if they do not exist.
3. Leaving the camlock studs in place,
disassemble the chuck in the sequence listed
below and shown in Figure 10.
a. Place a set of wooden blocks under the
chuck so the camlock studs do not rest on
the table, and clamp the chuck to the
table as shown in Figure 10.
b
c
d
e
d
Mfg. Since 5/10 Model SB1231
-7-
I N S T R U C T I O N S