Mine broke one belt in a multi-belt system. The broken belt jammed in the system and took out the rest of them. That was 30+ years ago, so I don't remember what brand.If you had only a Belt Drive Failure, what Failed if you know, Belt(What Type of Belt), Bearing, Backing Plate, Pulley, and list the Brand Name if known. I'm sure many People would like to know WHY it failed, WHAT Brand Failed, What Rpms it failed, on What Engine it failed on, HP used.
=============================================================================================I should point out that none of the three belt drive failures I've had were the belt itself. Once the aluminum prop shaft fractured, once the eccentric for adjusting belt tension came loose, once the mounting bolts broke. Poor design, in every case. Belts rarely fail without warning if pay attention to them during preflight.