Description of problem:
The fracture originates from the back edge of band. The origin of the fracture is indicated by a flat area on the fracture surface.
Likely causes:
- Excessive back-up guide “preload” will cause back edge to work harden which results in cracking.
- Excessive feed rate.
- Improper band tracking – back edge rubbing heavy on wheel flange.
- Worn or defective back-up guides.
- Improper band tension.
- Notches in back edge from handling damage.
