Southbend SB1053 User Manual

For Machines Mfg. Since 3/11

16-Speed Gearhead Lathe

-35-

To ensure accurate work, it is extremely 
important to make sure the spindle nose and 
chuck mating surfaces/tapers are clean. Even 
a small amount of lint or debris can affect 
accuracy.

The chuck is properly installed when all 
camlocks are tight, the spindle and chuck tapers 
firmly lock together, and the back of chuck is 
firmly seated against the face of the spindle all 
the way around—without any gaps.

  DISCONNECT LATHE FROM POWER!

  Use an appropriate lifting, support, or 

protective device to protect the ways and 
support the chuck.

  Clean and lightly oil the camlock studs, then 

thoroughly clean the mating surfaces of the 
spindle and chuck.

  Install the chuck by inserting the camlock 

studs straight into the spindle cam holes.

Important: Avoid inserting the studs by 

pivoting them in from an angle or rotating 
the spindle. This can damage studs or bores.

  Incrementally tighten the camlocks in a 

criss-cross or star pattern to ensure that the 
chuck seats evenly against the spindle.

6.  When the chuck is fully seated and all the 

camlocks are tight, verify that the cam line 
is between the two "V" marks on the spindle 
nose, as shown in the following figure.

— If the cam line is NOT between the "V" 

marks when the camlock is tight, the stud 
may be installed at the incorrect height. 
To fix this, adjust the stud height as 
shown in the following figure. Make sure 
to re-install the stud cap screw afterward.

— If adjusting stud height does not correct 

the problem, try swapping stud positions 
on the chuck.

Camlock between “V”s

Stud Too High:

Turn In

One-Turn 

Stud Too Low: 

Turn Out

One-Turn