[ROVERNET - UK] Vacuum actuators in heater
defender110 at ozemail.com.au
Mon Oct 10 12:42:58 BST 2005
If the bearing is indeed sintered, then it has hundreds of tiny "pores"
(like a sponge) that are meant to be filled with oil. Any machining of
the material just burrs over the pores, rendering the bearing useless.
The way to rejuvenate a dry sintered bearing is to press it out and
carefully soak it in hot oil for a few hours. Capillary action recharges
the pores with oil.
I used to use this method to re-lube the central bearing of Smiths mains
powered clock motors where the motor temp used to dry the bearing out
> I agree. I disassembled the motor. (that is the easy bit. Removing the
> A/C is the killer.) The shaft was dirty and scarred and ripped the brass
> bushing out with it. In so doing, the tines on the retainer were bent.
> As far as I know, the only thing done to the motor by the shop was a new
> or polished bearing, and new bearing retainer. Haven't reinstalled it
> yet though...
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