Blade Guide Bearing Adjustment - Jet J-7040M-4 Operating Instructions And Parts Manual

This assures that the blade is not touching the
shoulder of the wheel.
11. Shut off the saw.
12. Hold the hex adjustment screws with a wrench
and tighten the center locking screws. Make
sure the hex adjustment screws do not move
while tightening the center screws.
13. Install the two blade guide bearing brackets.
Position the guides so the bearings just touch the
blade.
14. Install the left blade guard.
15. Close the saw head cover . Tighten the four
knobs.
Figure 13: Checking blade-to-wheel
clearance using paper strips
Blade Guide Bearing
Adjustment
Proper adjustment of the blade guide bearings is
critical to efficient operation of the cut-of f saw. The
blade guide bearings are adjusted at the Factory .
They should rarely require adjustment. When adjust-
ment is required, adjust immediately . Failure to
maintain proper blade adjustment may cause serious
blade damage or inaccurate cuts.
It is always better to try a new blade when cutting
performance is poor. If performance remains poor
after changing the blade, make the necessary
adjustments.
If a new blade does not correct the problem, check
the blade guides for proper spacing. For most
efficient operation and maximum accuracy , provide
0.001 inch clearance between the blade and the
guide bearings. The bearings will still turn freely with
this clearance. If the clearance is incorrect, the
blade may track off the drive wheel.
CAUTION: CHECK THE BLADE TO MAKE SURE
THE WELDED SECTION IS THE SAME THICKNESS
AS THE REST OF THE BLADE. IF THE BLADE IS
THICKER AT THE WELD, THE GUIDE BEARINGS
MAY BE DAMAGED.
If required, adjust the guide bearings as follows:
1. The inner guide bearing is mounted on a concen-
tric bushing and can not be adjusted.
2. The outer guide bearing (closest to the operator) is
mounted on an eccentric bushing and can be
adjusted.
3. Hold the bushing with a 3/4-inch wrench and
loosen the center locking screw with an Allen
wrench (see figure 14).
Put Strip
Between
Wheel
and
Blade
Figure 14: Adjustment of guide bearings
Outer
Roller
Figure 15: Blade -to-bearing orientation
Inner Roller
Guide Bracket
Blade
INCORRECT
Inner
Roller
Blade
Eccentric
Bushing
Locking
Screw
CORRECT
13
Locking
Screw