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20
Adjusting Clamping Mechanism
The clamps are pre-set at the factory and should
not need any adjustment. However, if
adjustment is needed remove the stud (A, Fig.
24). Loosen the locking handle and slide the
headstock, tailstock or tool rest to the edge of
the bed and slightly turn the hex nut (B, Fig. 24).
Slide back into position and test the handle to
make sure it securely locks.
Changing the Belt and Bearings
Changing belt and bearings can be a difficult
task, and should be performed by a JET
authorized repair station. Remove headstock
and take into a repair station for servicing.
1. Disconnect the machine from the power
source!
2. Loosen the locking handle (C, Fig. 25), and
lift up on the tensioning handle (D, Fig. 25)
to remove tension from the poly v-belt.
3. Open door (E, Fig. 25), and remove the belt
(F, Fig. 25) from the lower pulley.
4. Loosen two set screws in the handwheel (G,
Fig. 25) and remove.
5. Loosen socket head cap screw enough to
unthread the clamping nut (H, Fig. 25).
6. Loosen two set screws in the right hand
pulley (I, Fig. 25).
7. Loosen set screw in the collar (J, Fig. 26)
8. Use a wood dowel, or aluminum stock to
knock spindle towards the tailstock. Use a
material that is softer than the spindle so
you do not mushroom end of spindle. Go
only far enough to remove belt from spindle,
see Figure 26.
9. Now you can replace the belt or bearings.
There are two bearings #5, and 10 that can
be seen in “Headstock Assembly,” page 24.
10. To reassemble reverse the procedure.
Note: When reinstalling clamping nut
thread it on to the spindle until its snug.
Then back off slightly and tighten the socket
head cap screw.