Wen 3939, Инструкция по эксплуатации, Страница: 13 / 24

ASSEMBLY & ADJUSTMENTS
ADJUSTING THE UPPER GUIDE BEARINGS
Proper adjustment of the guide bearings is one of the best things
you can do for your saw – it will prolong blade life, prolong bear-
ing life, and help prevent blade “drift”. Turn off and unplug the
band saw before beginning. Open the upper door.
WARNING! The upper blade guide bearings must be ad-
justed after every blade change and tracking adjustment.
1. Use a hex wrench to loosen the lower set screw (Fig. 11 - 1) on
the right side of the upper guide bearing assembly. Position the
assembly so that the roller bearings are about 1 – 2 mm (1/10
inch) behind the tooth gullets. Tighten the screw.
NOTE: Ensure that you do not rotate the upper guide bearing as-
sembly about the shaft. Make sure the screw is tightened onto the
flat of the shaft.
2. Use a hex wrench to loosen the upper set screw (Fig. 11 – 2)
on the right side of the assembly. Position the thrust bearing so
that it is as close to the spine of the blade as possible, without
touching it.
3. Rotate the blade a few times to ensure that the spine of the
blade does not touch the bearing at all while the blade is rotating.
Once the bearing has been properly positioned, tighten the screw.
4. Use a hex wrench to loosen the socket-head cap screws on the
front of the assembly (Fig. 12). Position the roller bearings, left
and right, so that they are as close as possible to the body of the
blade without touching it. This will be about 0.5mm (1/50 inch).
TIP: Insert the hex wrenches through the holes in the right side of the housing in order to access the screws more
easily.
1. Use a hex wrench to loosen the upper socket-head cap screw (Fig. 13 – 1). Position the assembly so that the roller
bearings are about 1 – 2 mm (1/10 inch) behind the tooth gullets. Tighten the screw.
WARNING! The lower blade guide bearings must be adjusted after every blade change and tracking adjust-
ment.
Fig. 12
Fig. 11
1 2
5. Rotate the blade a few times to ensure that the body of the blade does not touch either roller bearing at all while
the blade is rotating. Once the bearings have been properly positioned, tighten the screws.
ADJUSTING THE LOWER GUIDE BEARINGS
Proper adjustment of the guide bearings is one of the best things you can do for your saw – it will prolong blade
life, prolong bearing life, and help prevent blade “drift”. Turn off and unplug the band saw before beginning. Open
the lower door.
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