BACK GAUGE - ADJUSTMENT FOR PARALLELISM
After prolonged use or after resharpening the blades, it may become necessary to adjust the back gauge dial to
obtain accurate shearing. If adjustment is necessary, adjust the back gauge angle for parallelism first and then check
accuracy of the back gauge dial.
To adjust the back gauge, proceed in the following manner:
(1)
For the sake of safety, make certain that the main disconnect switch is in the "OFF" position.
(2)
Check the back gauge screw and nut for looseness by trying to move the back gauge angle back and forth by
hand. If looseness is evident, remove this looseness before proceeding with the adjustment of the back gauge
angle. Refer to Figure 25 and proceed as follows:
A.
On the underside of the back gauge angle carriage, loosen Compensating Nut Lock Ring :A".
B.
Using a small pin, turn Compensating Nut "B" clockwise until all backlash has been eliminated. do not
adjust any tighter than necessary to remove backlash.
C.
Retighten Compensating Nut Lock Ring "A". This adjustment should be made on both the right hand and
(3)
Move the back gauge angle so that a gauge block, 4" for example, can be inserted between one end of the back
gauge angle and the lower blade. Now check the spacing at the opposite end of the back gauge angle. If the
spacing is not the same at both ends, the back gauge angle is out of parallel with the lower blade and
adjustment is necessary.
Figure 25. Back Gauge Angle - Backlash Eliminator.
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