High Impact Resistant Polymer

[robche]

We have a shaft which moves around within the confines of a limit ring inside a large tank.

As the shaft rotates, it bends and jumps around due to deflection and the ring ensures it doesnt move to far. However the shaft and ring are getting some serious damage as they hit.

Are there any good high impact resistant (assume unfactored horizontal load of about 23kN) that will not wear away or chip off during operation.

Kind regards all,

 

[Pud]

If this is for a one-off, "machine it up" job, I would have thought Ultra-High Molecular Weight Polyethylene would do nicely. (UHMWPE for the acronym and your Google search)

Cheers

Harry

http://www.tynevalleyplastics.co.uk

 

[patprimmer]

I agree with Pud.

Also keep it close to the shaft and back it up with steel if possible.

Regards
Pat
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[robche]

Thanks gents, will look into it.

----
Robert Markoski - Project/Mechanical Engineer

http://wwww.RobertMarkoski.net/Engineering

 

[Compositepro]

You need a bearing in that location. You are essentially trying to create one, but it will not work if the shaft surface is rough or wobbling. A better approach would be a ball or roller bearing (or a sleeve bearing), perhaps mounted in a rubber bushing.

 

[btrueblood]

Or mounted in a spherical plane bearing/housing.

 

[btrueblood]

argeh. Plain bearing? I.e., not a roller bearing. Ah forget it...

 

[patprimmer]

I wondered what a spherical plane was ;-)

Regards
Pat
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[Pud]

The surface of a sphere with an infinite diameter, I guess?

H

http://www.tynevalleyplastics.co.uk

 

[btrueblood]

Thanks Pud, that's right. So there, Pat.

Some days you just need to go home and have a beer. Yesterday was one of those.

 

[dsheets05]

I would check out a material called ORKOT or ORKOT equivalent. I would need to know your media, max load, and temp to insure this is a good recommendation. Trelleborg the company that makes Orkot has long lead-times, if you need something fast try Hallite I think they offer a 552 which is very similar.