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
@jwz Have you tried an ordinary rubber band inside the groove?
Or something ever so slightly more specialized, like one of these? https://www.amazon.com/dp/B0GGB2MDHT
(sorry for the Amazon link)
Buy 50 Pcs Cassette Belts Recorder Rubber Belts Recorder Repair Maintenance Tape Machine Rubber Belt 40-135 mm Mix Size 4mm Width Flat Cassette Belt for DVD CD LD VCR Repeater Drives: Tape Decks - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
jwz
Thomas Sibley