Using a cv joint and a universal joint on the same shaft

[Mikes1098]

Does anyone know of any issues making a half shaft with a inner cv joint (which allows the shaft to change length) and a universal joint in the outer position (instead of the outer cv joint)?

I have space limitations where I can't seem to fit the outer cv joint...

Thanks,
Mike

 

[thundair]

I never understood why they would use a needle bearing for a u joint.
I would think a plain oil lite bearing would work just fine.
The same for roller rockers with needle bearings making a quarter turn each time. Makes me go hmmmm...


I don't know anything but the people that do.

 

[GregLocock]

You'd see an even worse problem with false brinelling if you used a plain bearing - all the oil would get squeezed out from under the contact patch and would never get back in.



Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[kellnerp]

Plain bearings need continuous rotation to build up a dynamic oil film. That doesn't happen in a U-Joint.

Plain bearings have a much higher friction coefficient than needle bearings. They would actually run hot in an automotive application.

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