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11
Changing Blades
Blade teeth are sharp! Use care
when handling the saw blade. Failure to comply
may cause serious injury.
Note: The JWBS-10OS Band Saw comes
equipped with a 67.5"x.375"x.014"x6TPI blade
(Part No. JWBS10OS-8) factory installed.
1. Disconnect machine from power source.
2. Open both wheel covers (K, L, Fig. 9).
3. Loosen lock knob (G, Fig. 8) and pull exten-
sion (O, Fig. 9) away from the table (C).
4. Remove rail guide (F, Fig. 5).
5. Release tension on the blade by moving the
tension handle (V, Fig. 10) to the right.
Referring to Figure 9:
6. Remove blade (H) from upper and lower
wheels (M, R) and from between the upper and
lower blade guides (N, Q).
7. Remove the blade through the slot (P) in the table.
8. Guide the new blade through table slot (P)
leading with the smooth edge. Place it around
the upper and lower wheels and into the upper
and lower blade guides (N, Q).
Note: The blade teeth should face the operator,
and they should point down toward the table.
9. Position the blade to track in the middle of the
rubber tires on the wheels (M, R).
10. Engage tension on the blade by moving the
quick tension handle (V, Fig. 10) to the left.
11. Replace rail guide (F, Fig. 5).
Before operating the saw, check that the blade is tracking
and has proper tension as described in Adjusting Blade
Tension and Adjusting Blade Tracking below.
Adjusting Blade Tension
Referring to Figure 10:
1. Disconnect machine from power source.
The blade tension knob (T) is used to adjust blade tension.
Note 1: The quick tension lever (V) must be engaged
before making tension adjustments with knob (T).
Note 2: All bearings on upper and lower guides
must be clear of blade (see Blade Guide and Guide
Bearing adjustments on following page).
2. Apply just enough tension to take the slack out
of the blade.
3. Turn one wheel a few times to allow the blade
to position itself in the center of the tire.
Note: If blade does not center see Adjusting Blade
Tracking section (this page).
A scale (X) directly behind the upper wheel (M)
indicates the approximate tension according to
the width of the blade.
4. Set the blade tension with knob (T) to correspond
to the blade width as marked on the gauge (X).
Note: A meter is recommended to precisely set
tension the blade for the size of blade used.
Note 1: As you become more experienced with the
saw, you may find it necessary to change the blade
tension from the initial setting. Changes in blade
width and the type of material being cut will have
an effect on blade tension.
Note 2: Keep in mind that too little or too much
blade tension can cause blade breakage.
Adjusting Blade Tracking
Referring to Figure 10:
Disconnect machine from the
power source! Never adjust blade tracking with
the machine running! Failure to comply may
cause serious injury!
Tracking refers to how the blade is situated upon
the wheels while in motion. The blade should track
in the center of both wheels.
The blade must be slightly tensioned (see previous
section) before adjusting blade tracking.
Make sure
blade guides and bearings
(N, Q, Fig. 9) do not
interfere with the blade. If blade tracking is
required, blade guide adjustment is described on
the following page.
1. Open the top and bottom wheel covers. Rotate
the wheel forward by hand, and observe the
position of the blade on the wheel through the
window (S). It should be in the center of the
wheel.
If adjustment is necessary:
2. Loosen the wing nut (U) and make adjustment
with tracking knob (W) while rotating wheel by
hand.
3. Tightening the tracking knob slightly will move
the blade so it tracks towards the rear of
machine. Loosening the tracking knob slightly
will cause the blade to track toward the front of
the machine.
4. After blade is tracking in the center of the
wheel, tighten the wing nut (U).
Figure 10