Southbend SB1231 - Manual (Page 4)

6. With the help of another person, or with the
help of a chuck cradle, align the chuck with
the spindle so the studs and camlock bores
are aligned correctly, and carefully slide the
chuck onto the lathe spindle. Never rest the
chuck on its lower studs, as shown in Figure
5, and roll or push the top of the chuck into
place on the spindle. This is a bad practice
that may damage the studs and camlock
bores.
Do not install the chuck without having
the camlock cap screws in place or fully
tightened. Otherwise, the camlock studs may
turn with the camlocks on release, resulting in
the chuck being permanently locked onto the
spindle.
Figure 5. Typical alignment of studs and camlock
bores.
3. Clean away debris and oily substances from
the mating surfaces of the spindle and the
chuck to ensure the best fit possible.
4. Inspect and make sure that all camlock
studs are undamaged, clean, and lightly
oiled.
5. Make sure that the camlock stud retaining
cap screws are snug, but still allow the studs
to be rotated back and forth slightly by hand.
This free-play is critical to ensure that the
camlocks tighten and lock with the studs
completely, and will release without binding.
— If a problem is found with the camlock
locking or release, remove the offending
stud and clean it with mineral spirits.
Compare it with a good stud for any
inconsistencies, and replace it if a problem
is found. Inspect the bore, cap screw, seat
depth, and threads with others that are
known to be correct. Chase all threads,
and remove any burrs or dings in the seat.
Dry out the bore with compressed air and
lightly re-lubricate with a drop or two of
machine oil or way oil.
Figure 4 . Wooden chuck support cradle.
Before turning the lathe
ON, make sure the chuck
key is removed! A thrown
chuck key can cause
serious injury or death to
the operator or bystanders.
1. DISCONNECT LATHE FROM POWER!
2. Lay a chuck cradle (see Figure 4) 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.
Chuck Installation and Removal
INCORRECT CORRECT
-4-
Mfg. Since 5/10 Model SB1231 I N S T R U C T I O N S