Southbend ROTARY TABLE SB - Manual (Page 21)

-19-
SB1363-64/SB1367-68 Mfg. Since 10/09 S E R V i C E
Spindle Preload
Setting the spindle preload on the
rotary table affects the accuracy and
ease of use during operation.
Keep in mind, that too much preload
will make table rotation difficult
and will cause pre-mature wear of
the gears and mating surfaces of
the table. Conversely, not enough
preload may result in reduced
accuracy. Use your best judgment
when setting the spindle preload on
the rotary table.
Tool needed Qty
Hex Wrench 3mm. . . . . . . . . . . . . . 1
To set the rotary table spindle
preload:
1. Make sure the table locks are
loose.
2. Use the backlash adjustment
ring to disengage the worm
shaft from the worm gear so
that the table can be freely
rotated by hand and not the
handwheel.
3. Position the table in a vertical
position so that both the front
and the back are accessible.
4. From the back of the rotary
table, loosen the spindle lock
collar cap screw (see Figure 16
on the previous page).
5. Loosen the lock collar at least
two full turns to remove any
preload.
6. Rotate the table by hand as you
re-tighten the lock collar. When
it becomes difficult to turn the
table, back off the lock collar
slightly until the table rotates
freely again, then, while keeping
the lock collar from rotating, re-
tighten the lock collar cap screw.
7. Use the backlash adjustment
ring to re-engage the worm
shaft and gear, then test the
table rotation by using the
handwheel.
— If you are not satisfied with
the table rotation, repeat
this procedure to re-adjust
the preload until you are
satisfied with the results.