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Re: [T3] Upper torsion arm needle bearings

On 23 Nov 2003 at 16:49, Dave Hall wrote:

> On the needle-bearing saga, one of our club members was telling me just today
> that he made up a new 'bearing' with a sleeve of DEVA metal.  It's been fine for
> the past 3 years anyway.  He's sending a drawing and other info, but I gather
> it's an aerospace material so may not be readily available over the counter.

I just Googled on <deva bearing> and came up with the fact that it is a product 
of Federal-Mogul DEVA GMBH. It looks like a pretty good product, but I didn't 
get into it very far. The hard part is likely to be that they probably have 
pretty tight requirements for the journal surface. The torsion arm might be 
welded up and refinished to a smooth surfact, but then it might have to be heat 
treated and hardened.

The photos show some strips which might be bendable into rings for bearings of 
arbitrary diameter. I'm not sure, but if this is the case it would be good for 

They may have hardness and smoothness specs somewhere, but I didn't find them.

In general, it's much harder to make a good bearing for reciprocating motion 
than for continuous motion.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org

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