I know size wise this is probably useless, but how about something like this to wrap around the outside of the bearing: [www.ebay.com]
It's basically just a rubber casing, presumably to fit right on top of a standard metal bearing. If the correct size could be found, surely that'd work pretty well against the metal surface and should not only prevent wear, but also reduce sound. This is of course if we can figure out the size needed.
It's basically just a rubber casing, presumably to fit right on top of a standard metal bearing. If the correct size could be found, surely that'd work pretty well against the metal surface and should not only prevent wear, but also reduce sound. This is of course if we can figure out the size needed.