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G1012 18" Bandsaw -23-
The support bearings back-up the blade during
the sawing operation. To adjust the upper sup-
port bearing, loosen the shaft setscrew. The
upper blade support bearing should be adjusted
to within .016" (four thicknesses of a dollar bill)
behind the blade as shown in Figure 29.
Retighten the shaft setscrew.
LOWER BLADE GUIDE ASSEMBLIES
The lower blade guide assemblies should be
adjusted to the same tolerances as the upper
guide assemblies.
1. Adjust lower support bearing to within .016"
from the rear of the blade.
2. Adjust lower guide-blocks to .004" from
blade sides.
3. Adjust lower guide-block holder to within
1
⁄16"
behind blade gullets.
4. Secure all adjustment knobs and screws.
5. Make sure the blade tracks true. Inspect for
any blade deflection caused by incorrect
positioning of the guide blocks. The support
bearings should rotate only under load.
Figure 29. Single dollar thickness on each side
of the blade.
Figure 30. Dollar folded twice for support
bearing adjustment.
2. Clearance between the blade and the guide-
blocks should be .004" (similar to the thick-
ness of a dollar bill). For an easy gauge, fold
a dollar bill in half and place each half on
each side of the blade as in Figure 28.
3. Adjust the guide blocks and lock into position
by tightening the thumbscrews. Remove the
dollar.