Jet 891170, Operating Instructions And Parts Manual

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Horizontal Band Saw
11.10 BLADE BREAK SENSOR
A sensor is positioned near the drive wheel. If the blade
breaks or has insuffi cient tension, the sensor switch will
shut off the saw to prevent further damage.
11.11 BLADE TENSION & TRACKING
Turn handle (A, Fig. 11-8) clockwise to tighten the blade,
or left to detension it for blade replacement.
Blade tension has been preset by the manufacturer for
the supplied blade. Tension is shown in the gauge above
the handle; proper tension will be in the green area, about
1800~2000 kgs/cm² Do not overtension blades.
CAUTION: Tracking adjustments must be performed
by qualifi ed persons who are familiar with this type of
adjustment and the dangers associated with it.
The saw blade has been properly tracked from the factory.
If a tracking problem occurs, proceed as follows:
1. Raise saw head to a convenient position if desired.
2. Open blade covers and inspect blade. The back edge
of the blade should make light contact with the fl ange
of the drive wheel.
3. Locate tracking adjustment bolts on the backside of the
saw head behind the idler wheel (Fig. 11-8).
4. Turn on saw blade at low speed.
5. Loosen center screw (C, Fig. 11-8).
6. Turn adjustment screw (D, Fig. 11-8) until blade back is
lightly contacting wheel fl ange. Blade should not rub
hard against the fl ange.
7. When satisfi ed, shut off blade and tighten center
screw (C) to secure setting. (Note: Hold adjustment
screw with the wrench while tightening center screw to
prevent further adjustment.)
IMPORTANT: If band saw will remain idle for an extended
period, back off blade tension (A) to reduce unnecessary
wear on wheels and components.
Fig. 11-7
Fig. 11-6
B
A
Fig. 11-8
A
C D