Heavy wear and/or swagging on back edge

Description of problem:
Heavy back-edge wear will have a polished appearance or abnormal grooves worn into surface. Swaging of corners can also occur.

Likely causes:

1. Excessive feed rate.
2. Excessive back-up guide “preload”.
3. Improper band tracking – back edge rubbing heavily on wheel flange.
4. Worn or defective back-up guides.