Jet J-7040 Operating Instructions And Parts Manual

Also see for J-7020: Operating instructions and parts manual

12the wheel shoulder. Put a 6-inch length of paperbetween the blade and the wheel as shown in figure11. The paper should not be cut as it passes be-tween the wheel shoulder and the blade.9. Turn the single hex adjustment screw a small amount.Repeat the insertion of the paper between the wheelshoulder and the blade until the paper is cut in twopieces.NOTE: You may have to repeat the check with thepaper several times before the blade and the shouldercuts the paper into two pieces. Do not hurry the ad-justment. Patience and accuracy here will pay off withbetter, more accurate, quieter cutting and much longermachine and blade life.10. When the paper is cut, turn the hex adjustmentscrew slightly in the counterclockwise direction. Thisassures that the blade is not touching the shoulderof the wheel.11. Shut off the saw.12. Hold the hex adjustment screws with a wrench andtighten the center locking screws. Make sure thehex adjustment screws do not move while tighteningthe center screws.13. Install the two blade guide bearing brackets. Posi-tion the guides so the bearings just touch the blade.14. Install the left blade guard.15. Close the saw head cover. Tighten all four knobs.should rarely require adjustment. When adjustment isrequired, adjust immediately. Failure to maintain properblade adjustment may cause serious blade damage orinaccurate cuts.It is always better to try a new blade when cuttingperformance is poor. If performance remains poor af-ter changing the blade, make the necessary adjust-ments.If a new blade does not correct the problem, checkthe blade guides for proper spacing. For most effi-cient operation and maximum accuracy, provide 0.001inch clearance between the blade and the guide bear-ings. The bearings will still turn freely with this clear-ance. If the clearance is incorrect, the blade may trackoff the drive wheel.CAUTION: CHECK THE BLADE TO MAKE SURE THEWELDED SECTION IS THE SAME THICKNESS ASTHE REST OF THE BLADE. IF THE BLADE ISTHICKER AT THE WELD, THE GUIDE BEARINGS MAYBE 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) ismounted on an eccentric bushing and can be ad-justed.3. Hold the bushing with a 3/4-inch wrench and loosenFigure 13: Blade -to-bearing orientationFigure 12: Adjustment of guide bearingsINCORRECT CORRECTOuterRollerInnerRollerBlade LockingScrewGuide BracketEccentricBushingLockingScrewBladeOuter Roller(Blade Guide Roller)Figure 11: Checking blade-to-wheel clearanceusing paper stripsMotor "ON"Upper WheelRotatingPut StripBetweenWheelandBladeBlade Guide BearingAdjustmentProper adjustment of the blade guide bearings iscritical to efficient operation of the cut-off saw. Theblade guide bearings are adjusted at the Factory. They