As a part of our 2020 design we are going to use flat urethane belts in a conveyor belt system. We are going to order custom lengths from McMaster and we are wondering how much stretch the belts should have (how much less than the actual distance).
I’ve heard 10%, and that’s what we’ve used with good luck the few times we’ve used it. You can always go a little shorter to dial it in with cutting out a bit, but it’s harder to go longer.
Consider ordering it from vexpro. The cost difference is substantial.
My experience has been that it’s something you’ll really want to test based on your particular belt run. Even small amounts of difference in length can make a big difference in tension