[Peter Matteson]

Originally Posted by DonRotolo

The worst thing that happened to our orange urethane belting is that students got this idea to cut and re-join it after almost every match "just in case". sheesh.

That is a bad idea. I make our students wait at least 15min before putting any load on the cord after welding because the weld needs to cool and solidify. Changing it that quick sounds like a bad idea.

We have green polycord from 2004 and orange from 2006 that still work fine.

Originally Posted by Jared341

After using flat urethane belting for the first time this year, we will probably never use round polycord again (except if we need a crossed belt somewhere).



Easy to weld (overlap, hit with a heat gun, and press with something flat to square the weld. Turn over and repeat). Doesn't require grooves (just build up a crown out of tape and the belt self centers, see: http://www.lhup.edu/~dsimanek/scenario/crowning.htm).

Our rollers are just aluminum tubes with bearings pressed in each end.

We used those last year on our roller claw, and I liked them a lot, but for what we did with our intake I needed to use round for cross over and wanted to keep it consistent.

Also for keeping our belts tracking we cut rings of 1/8" that we welded to the .049" wall Al tube that forms our rollers. Not the most efficient or fastest way to make belt guides but it's signifigantly lighter than anything else we've tried.