Jet JWBS-140S, Operating Instructions And Parts Manual

15

7.  Guide new blade through table slot. Place 

blade in upper and lower blade guides. 

Note:

 The blade teeth should face the operator, 

and they should point down toward the table. 

8.  Place blade in the middle of the upper and 

lower wheel. 

9.  Re-install table insert (B) and table pin (C). 

10. Tension and track blade before operating saw.  

Find instructions for tensioning and tracking the 
blade in the 

Adjusting Blade Tension 

and 

Adjusting Blade Tracking

 sections. 

Adjusting Blade Tension 

1.  Disconnect machine from power source. 

2.  Turn blade tension knob (Figure 17) clockwise 

to tension blade.  

3.  Apply just enough tension to take the slack out 

of the blade. 

4.  Turn one wheel a few times to move the blade 

to the center of the tire 

5.  With a meter, tension the blade appropriately 

for the size of blade used. 

6.  A gauge (Figure 17) on the upper wheel slide 

bracket indicates the approximate tension 
according to the width of the blade. Initially, set 
the blade tension to correspond to the blade 
width as marked on the gauge. 

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 

 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 properly tensioned before 
adjusting blade tracking. Make sure blade guides 
and blade bearings do not interfere with the blade.  

1.  Open the top wheel cover. Rotate the wheel 

forward by hand, and observe the position of 
the blade on the wheel. It should be in the 
center of the wheel. 

Figure 17 

Figure 18 

2.  If adjustment is necessary, loosen wing nut 

(Figure 18). Tightening the tracking knob 
slightly will move 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. 

3.  After blade is tracking in the center of the 

wheel, tighten the wing nut.