The proper chain tension is critical to achieving acceptable service life as excessive tension can cause accelerated wear or
chain overload and excessive slack can cause rough chain operation and possibly result in the chain skipping a sprocket
tooth, resulting in a catastrophic failure. For Vastex drives, the total movement in the slack span of the chain (up and
down total movement) should be .25 to .38 inch. Please see below for picture.
Total slack is .25
to .38 inch. This is
total up and down
movement.
This is the slack in the down position.
This is the slack in the up position.
Chain Tension measured and why it is important
Pg. 14
Summary of Contents for D-100
Page 16: ......
