Southbend SB1231 - Manual (Page 5)

7. Tighten camlocks in a star pattern to draw
the chuck in evenly and reduce the chance
of misalignment. Make sure to tighten
camlocks in an incremental manner to
ensure that one camlock does not get fully
tightened before the others (i.e., snug the
camlocks on the first pass, then moderately
tighten on the next pass, then fully tighten
on the third pass).
As you tighten the camlocks, the chuck
will seat with the spindle nose. When fully
tightened, the cam line will fall between the
two "V" marks on the spindle nose, as shown
in Figure 6.
Figure 6. Camlock is fully tightened with the camlock
line positioned between the "V" marks.
— If the cam is fully tightened, but the cam
line is positioned outside of the “V” marks,
remove the chuck and adjust the height of
the offending camlock stud, as outlined in
Camlock Stud Adjustment on Page 3.
8. When installation is complete and you are
satisfied with the results, lightly stamp a set
of alignment marks on the chuck and spindle.
Note: Alignment marks ensure that the
chuck can be re-installed in the correct
position every time for consistent chuck and
spindle alignment. It also allows for the same
camlocks and studs to operate together for
consistent locking and unlocking.
Cam line is between
the "V" marks
PINCH HAZARD! Protect your hands and the
precision ground bedways with plywood or a
chuck cradle when removing the lathe chuck!
The heavy weight of a falling chuck can cause
serious injury.
To remove the chuck:
1. DISCONNECT LATHE FROM POWER!
2. Lay a chuck cradle or plywood under the
chuck and over the bedway to protect the
precision ground surfaces from damage and
reduce the risk of fingers getting pinched.
3. Loosen the camlocks by turning the key
counterclockwise approximately one-third of
a turn until the mark on the camlock aligns
with the spindle mark on the spindle nose
(see Figure 7). If the stud does not freely
release from the camlock, wiggle the camlock
until it stud releases.
Note: Camlocks can become very tight. A cheater
pipe may be used to add leverage when
loosening.
Figure 7. Camlock is fully loosened when the camlock
line is aligned with the spindle mark.
Cam line is
aligned with the
spindle mark
Mfg. Since 5/10 Model SB1231
-5-
I N S T R U C T I O N S