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The bearing is R-24 ball bearing, and we don't know what our customer use it for except vaseline is used as lube. The bearings became stick and were returned to us. We cleaned them with kerosene and re-greased them, finally they worked like a brand new. We suspect that vaseline deteriorate after...

Can I use vaseline as bearing lube? I heard vaseline is too viscous and trap dirt more easily.

Thanks, flexibox. I made a typo in my last post, the shaft tolerance should +/-0.05mm rather than +/-0.005mm. It makes perfect sense that the spring should slide it back, but is the seal itself stantionary? Otherwise, how can it seal the fluid? My understanding is the ID of the Type 21 mechnical...

Does everybody know where to find the elastomer bellows seal tolerance standard? I've found the John Crane's type 21, but I suspect that it can be used for the standard. How about ANSI or ISO standard? I heard from a colleague that the usual one is +0mm/-0.5mm, but if the shaft tolerance is...