Jet J-9225, Operating Instructions And Parts Manua

Page: 13 / 28

13
Bearing and Guide Block Adjustment
Referring to Figure 10:
Guide bearings and carbide guide blocks are located
on either side of the saw blade and provide stability
for the blade when the saw is in operation. These
bearings rotate on an eccentric shaft so the distance
from the blade can be adjusted for optimal
performance.
Guide blocks provide additional blade stability.
Guide bearings and guide blocks are initially adjusted
at the factory and should rarely require adjustment.
It is always better to try a new blade when cutting
performance is poor. If performance remains poor
after changing the blade, check the blade guides for
proper guide bearing spacing. For most efficient
operation and maximum accuracy, clearance
between the blade and the guide bearings should be
0.001-inch. The bearings will still turn freely with this
clearance. If the clearance is incorrect, the blade may
track off the drive wheel.
Disconnect the bandsaw saw
from its electrical power source.
If required, adjust the bearing and guide block on one
assembly then the other as follows:
1. Using a 3mm hex wrench, loosen two set-screws
(A) that secure the eccentric bushings.
2. Using a 4mm hex wrench, loosen the socket
head cap screw (E) securing the guide block (F).
3. With a 12mm wrench, loosen the hex nut (G) that
secures the guide block adjustment setscrew (H).
4. Position the bearings (B) by turning the bushings
(C) with a flat-head screwdriver. Set the
clearance between the
bearings (B) and blade
(D) at approximately 0.001 inch.
When properly adjusted, the blade should be in a
vertical position between the bearings as shown
in Figure 11.
5. Secure the bushing settings by tightening the
setscrews (A).
6. With a 4mm wrench adjust setscrew (H) so the
guide block (F) supports the blade without
pinching the blade.
7. Tighten the socket head cap screw (E).
8. Maintain the position of the setscrew (H) with the
hex wrench while tightening the hex nut (G).
Figure 10
Outer
Roller
Inner
Roller
Locking Screw
INCORRECT CORRECT
Saw Blade
Saw Blade
Figure 11