I recently acquired a Grizzly 12"disc/6"belt sander and it came with a few new belts. I decided to change out the old belt and it seemed straight forward, remove old belt install new belt, center it and start sanding, but no such luck. The new belt disentegrated within seconds of my putting a piece of wood to it! Not a fun thing I can tell ya, another good reason to ALWAYS WEAR EYE PROTECTION! So I figured it was a bad belt and loaded up a second one, wham! same thing!!!! Put the old belt back on and it worked like a charm And yes they were the same size belts and yes I put them on with the arrows pointing in the direction that it turns. So where have I gone wrong? These were Craftsman belts and even though not used, had been stored for quite a few years. I was thinking of putting on a new disc and now I'm wondering if there's more to it than peeling of the old and gluing on the new, don't wont another eye opener at those RPMS! THANKS!