jwzFeb 27

Let Friction Ring.

Dear Lazyweb, I have this pulley wheel, 50mm inside diameter, 4mm groove. I need a rubber traction ring to go inside it. I cannot find anyone who will sell this to me. The ring must be flat or concave, not round like a typical...
https://jwz.org/b/yk33

Show threadKarl
@jwz I don't think I can help you, but your post makes me curious: how comes the rope slides off the track instead of just slipping? It doesn't seem to be tensioned with a twist, but perhaps I'm seeing this wrong. (I'm also curious about the rationale of using this kind of rope as a belt to drive a high torque application.)
Feb 28 at 9:42amWeb
Show threadjwzFeb 28
@karl It doesn't slide off the track, it just slips. With a round O-ring type friction element, it would slide off which is why that's a no go.
Show threadGerardFeb 28
@karl @jwz if you follow the links, you'll find it's driving a curtain rail, I assume the cord is dictated by the rail.