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800-997-4467 sales@beltalignmenttool.com
www.beltalignmenttool.com 800-997-4467 sales@beltalignmenttool.com
Diagram 4: B.A.T. Laser Span Deflection Method
7. Place the tip of the Span Deflection Scale on the belt, at the center of the span.
8. Loosen the brass lock nut, then adjust the position of the Deflection Span Scale up or down
on the adjustment rod until the lasers are on the ZERO line (see picture 2 above)
9. IF needed again Zero the BT-357D by pressing the ZERO button. (See Picture 5)
10.
Apply a sufficient force to BT-357D to deflect the belt such that the O-ring is in-line with the
lasers. Maximum force is 110lbs.
11.
Read the deflection force on the BT-357D display
12.
Compare this force with the value given on the chart or table supplied by your belt
manufacture.
13.
Zero the reading in the BT-357D and remeasure to verify results.
14.
If the force is below the recommended value, increase the drive center distance to provide
greater belt tension.
15. Reduce the center distance if there is too much force.
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