Replacement Drive Belt for Thumler's MP-1 & Model T-100 "Thin" For Newer Models (3 Pack)

Was expecting these would be tough replacement drive belts, with fiber reinforcement like any good drive belt. Sadly, they were no more than 4" diameter O-rings, which is what I'd been using as a substitute, not even expecting these to be available (I've had the tumbler since the early 1970s). Bought the three-pack and each of the first two has lasted for maybe 15-20 days before snapping. These square O-rings [https://www.amazon.com/gp/product/B0051XZJAW/ref=ppx_yo_dt_b_search_asin_title] last slightly longer and are much cheaper on a per-unit cost.

According to what I read they dont last as long as the ones you can buy at geo shops

They look like a good product but they were too loose for my T-100 model even though they said they would fit. I am going to make them fit by removing the motor box and adding in a spacer i made out of aluminium but thats not something that just anyone can do. Just be advised.

Price right, on time delivery, works perfectly

I suspected it might not fit when I ordered it. I was able to adapt it and get the tumbler working again.

The first belt I tried worked okay for about a week, then became loose and wouldn’t rotate my MP-1 tumbler. Tried the other two belts in the package, and they were so loose didn’t fit the machine at all.

Perfect fit, pretty solid. Breaks down quickly even inside.

Works perfectly and we are washing rocks as planned!

To large and there is no adjustment on the tumbler to compensate for this.