How sealed is a sealed bearing

Charles

I suspect a modern 'sealed' bearing will significantly reduce the oil flow through the bearing. However, another option I know to have been successfully used in similar situations is for the felt to be immersed in hot tallow (candle fat) prior to installation!

It's worked for me in the past when it was used very successfully on leaky wheel bearing felts which leaked onto thee brake shoes of an older car.

How much crankcase pressure is there from the engine?

A sealed bearing will be fine.

Peter

-- Peter A Forbes Prepair Ltd, Rushden, UK snipped-for-privacy@prepair.co.uk

almost none - it vents all over the place (lately all over the magneto)

Charles

Charles,

A sealed bearing is only as good as the seal which is fixed but the inner must still rotate therefore there must be a gap. The seal is generally to retain the grease and keep out the dirt.

a Z (shielded) bearing will have a gap, but an RS (Rubber seal) bearing won't have a gap. A 2RS bearing is probably indicated in this application,

Mark Rand RTFM

Mark, Agreed but oil pressure will break through over time.

Martin P

"campingstoveman" schreef in bericht news: snipped-for-privacy@bt.com...

As written previously, they are only to keep dirt out and grease in. I only know of the black rubber oil/grease sealing rings.for this purpose. Dirk