20
Changing the Blade Speed
Disconnect machine from
power source before making any adjustments.
The JWBS-18QT and -20QT band saw has two
blade-speed options which is determined by the
position of the pulley drive belt. Refer to the
Specifications
section (page 6) for speed specs.
To change the blade speed (while referring to
Figure 25):
1. Loosen the
lock handle
(A) that secures the
motor
(C).
2. Release belt tension by pulling
handle
(B) up
which raises the motor, then tighten
lock
handle
(A).
3. Open the lower wheel
door
(C, Fig. 27).
4. Referring to Figure 26:
For
higher blade-speed
– place the poly V-belt
in the A position on the spindle and motor
pulleys as shown in Figure 26.
For
lower blade-speed
– place the poly V-belt
in the B position on the spindle and motor
pulleys.
After repositioning the belt:
5. Unlock
lock handle
(A, Fig. 25). Apply belt
tension by slightly pushing
handle
(B, Fig. 25)
down.
6. Tighten
the
lock handle
(A, Fig, 25) to secure
the
motor
(C, Fig. 25).
Belt Tension
The drive belt and pulleys are properly adjusted at
the factory. However, belt tension should be
occasionally checked. The belt will need to be re-
tensioned after belt replacement.
Disconnect machine from
power source before making any adjustments.
Referring to Figure 25:
1. Loosen the
lock handle
(A) that secures the
motor
(C).
2. Set the belt tension by lightly pressing down on
the
handle
(B).
The weight of the motor should put enough
tension on the belt. You just want to push down
lightly to take up any slack.
Figure 25
Figure 26
3. Tighten
the
lock handle
(A).
Note:
A new belt may stretch slightly during the
“breaking in” process, and the tension may
occasionally need to be checked and adjusted.
Place the
mode selection lever
(J, Fig. 18) in the
Partial Tension
position when the machine is not in
use.
