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).
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 li ghtly 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 t he
Partial Tension position when the machine is not in
use.