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Changing Blades

Blade teeth are sharp! Use care

when handling the saw blade. Failure to comply
may cause serious injury.

Note:

The JWBS-12OS 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).

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).

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 corres-pond

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.

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