I'm trying to repair an office desk chair where two of the parallel pivot points on the chair base assembly have gotten out-of-round. I determined that a simple fix is to insert a flanged sleeve bearing into the two pivot holes to restore their original dimension/specification - and then re-insert the securing bolt.
Trouble is that the only flanged bearing sleeves I could locate locally (ACE Hardware), were in a standard brass material. As a somewhat softer metal and given the irregular shape of the holes and the fact that these are moving pivot points, the brass sleeve isn't exactly delivering the long-term performance I need - as the chair movement gradually cuts through the sleeve, and we're back to square one.
Can anyone suggest a source for flanged sleeve bearings in a harder material - steel? I've checked with MCS
Thanks, Chris