Overview – Bearing Adjustments

Thrust (back support) bearing are located behind the saw blade and provide support to the back of the blade when the saw is in operation.

Guide bearings are located on either side of the saw blade and provide stability for the blade when the saw is in operation. These bearings rotate on an eccentric shaft so the distance from the blade can be adjusted for optimal performance.

Upper Bearing Adjustments

Unplug the machine from power source before making any adjustments! Blade teeth are sharp - use care when working near the saw blade. Failure to comply may cause serious injury.

Note: Blade tension and tracking must be properly adjusted prior to bearing guide setup. Refer to the Blade Tension section (previous page).

To adjust the thrust bearing:

1.Place the mode selection lever (J, Fig. 18) in the Full Tension position.

Referring to Figure 21:

2.Loosen the wing nut (E) and slide the bearing and bearing post until the space between the thrust bearing (H) and the back edge of the blade (G) is approximately 1/64”.

A convenient way to achieve this spacing is by placing a dollar bill folded twice (four thicknesses) between the blade and support bearing – four thicknesses of a dollar bill is approximately 1/64”.

3.Tighten wing nut (E).

To adjust the guide bearings (refer to Figure 22):

4.Loosen the locking handle (L) and slide the assembly until the front of the guide bearings rest just behind the gullet of the blade teeth (see inset).

5.Loosen two wing nuts (J1, J2). Rotate the adjustment handles (M) until the guide bearings

(K)rest lightly against the blade (N). Do not force the guide bearings against the side of the blade.

6.Tighten wing nuts (J1, J2 Fig. 22).

Check to make sure the adjustments have not changed and the bearing guides do not pinch the blade.

Place the mode selection lever (J, Fig. 18) in the Partial Tension position when the machine is not in use.

17

Figure 21

Figure 22

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Jet Tools 20QT-3, JWBS-18QT, 20QT-5, JWBS-20QT, 18QT-3 Overview Bearing Adjustments, Upper Bearing Adjustments
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JWBS-20QT, 18QT-3, JWBS-18QT, 20QT-5, 20QT-3 specifications

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