What lubricates the rear bearing seal?

[gimmesomeshelter]

Hello-

I just ordered some fancy/expensive ceramic hybrid bearings to replace my 50 years old rear axle bearings. Unlike the originals, they're sealed on both sides. I would like to install the rear seals, but I'm concerned that they'll burn up without gear oil sloshing around behind the them. Comments anyone?

Paul
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"I would rather have questions that can't be answered than answers that can't be questioned."

Richard Feynman

[Viande]

[Motorhead55]

I second Viande....
In the 40 plus years of working on VW's and old Porsches that used the 6306 rear axel bearing, I have only replaced a few.
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2007 Dodge Cummins Diesel 4x4 6spd stick
1939 WILLYS pickup
1967 Triumph Tiger Cub

[Dropped Metal Customs]

i use sealed bearings on lowed cars.
heres something i copyed off the interweb about sealed bearings
Note on sealed bearings
Sealed bearings have a tightly sealed cover installed on both sides of the bearing. This cover seals the bearing internals from outside contamination and more importantly the cover seals in the grease or oil.

Any attempt to lubricate a sealed bearing will damage the bearing by deforming and forcing the seals into the balls/rollers. The grease may also be forced out of the bearing case into the motor windings, switches, and connections. The motor may fail because of this.

hope this helps
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BUSDROPPINGBEAMNARROWINGSTEERINGBOXRAISING"C"NOTCHINGRUSTREPAIRINGBEETLEDROPPING
@DroppedMetalCustoms

[gimmesomeshelter]

Hello-

[Dropped Metal Customs]

yes i install everything as stock but with a sealed bearing if you ever have to jack your lowerd car up you wont have any oil leaking out of the axle tube
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BUSDROPPINGBEAMNARROWINGSTEERINGBOXRAISING"C"NOTCHINGRUSTREPAIRINGBEETLEDROPPING
@DroppedMetalCustoms

[58Dub]

[gimmesomeshelter]

Hello-

http://www.bocabearings.com/main1.aspx?p=product&id=9100&n=SMR6306C-2YS/C3_#3_L55

Yes, they are very expensive, but the prices are actually 10% less than what's posted on line.

Paul
_________________
"I would rather have questions that can't be answered than answers that can't be questioned."

Richard Feynman

[58Dub]

Great...thanks Paul
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58 Beetle (now just a pile of parts in the corner)
60 Beetle (2221 turbo under construction)
70 Beetle Baja project

[Sniperx]

sealed bearings are pre-lubed from the factory. Sealed is also kind of a loose term. They keep out grit and stuff, but they usually aren't air tight or water tight unless specifically noted. Oil may seep into the shields and contaminate the factory lube. They may need to be opened up and maintained once in a while...if they are the serviceable type.