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 gasket seal O-ring, or the string its pulling will just slide off the track. Alternately, any similar-sized metal pulley wheel that comes with a friction surface ...

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 gasket seal O-ring, or the string its pulling will just slide off the track.

Alternately, any similar-sized metal pulley wheel that comes with a friction surface pre-attached, 8mm axis hole with set screw.

I have tried coating it with sugru, but that is too soft and wears off after not-very-long.

Update: If you’re going to say “why don’t you just” or “have you searched for” without a purchase link to a product of the correct size, please know that you are not helping.

Previously.

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