Assembly; Upper Bearing Guide Adjustment - Jet JWBS-20 Operating Instructions And Parts Manual

Assembly

1. Attach the handle (A, Fig. 1) to the
handwheel (B, Fig. 1).
2. Turn blade tension hand wheel (C, Fig. 1)
counter-clockwise to tension blade and
clockwise to loosen the tension. A gauge on
the upper wheel slide bracket (D, Fig. 1)
indicates the approximate tension according
to the width of the blade. The JWBS-20
comes with a 1" blade so the tension should
be set at 1".
Note: It is easier to adjust the bearing guides
before mounting the table.

Upper Bearing Guide Adjustment

Disconnect machine from the
power source, unplug before making any
adjustments. Blade teeth are sharp; use care
when working near the saw blade. Failure to
comply may cause serious injury.
1. Disconnect the machine from the power
source, unplug.
2. Blade tension must be properly adjusted
prior to bearing guide setup; see "Adjusting
Blade Tension" page 15.
3. Loosen the thumb screw (F, Fig. 2) and slide
the bearing and bearing post until the space
between the back-up bearing (E, Fig. 2) and
the back edge of the blade is approximately
1/64". A convenient way to achieve this
spacing is by placing a dollar bill folded
twice (four thicknesses) between blade and
bearing – four thicknesses of a dollar bill is
approximately 1/64". Tighten thumbscrew.
4. Loosen the socket head cap screw (G, Fig.
3) and slide the bearing assembly until the
bearing guides rest just behind the gullet of
the blade teeth. You may need to readjust
the back-up bearing.
5. Loosen the wing nut (H, Fig. 3) and turn the
adjusting screw (I, Fig. 3) clockwise or
counter-clockwise
approximately 1/64" away from the side of
the blade (use the folded dollar bill for this
measurement). Tighten wing nut.
6. Adjust the opposite side bearing.
7. Check to make sure the adjustments have
not changed during the tightening process,
and that the bearing guides do not pinch the
blade.
until the bearing is
Figure 1
Figure 2
Figure 3
8