Bearings

currymunster · Feb 8, 2021

Nodge68 said:
If it's an angular contact bearing, then the other bearing will also be an AC bearing, and they work in pairs, pushing against each other.
However if it is an AC, then you should be able to adjust the preload, and take out any axial and radial movement.

My lathe runs angular contact bearings, which do occasionally need periodic adjustment, just to keep play under measurable limits.

Pretty much anyone with a lathe could make up bushings in Delrin (acetal), so should be easy enough to find someone locally to make them.

I use Delrin when making low friction parts for air rifles.

Kev12 said:
Good suggestion about turning a delrin bush or another option could be one of these https://simplybearings.co.uk/shop/p20000199/ENDURO-MR22312RSMAX-Rubber-Sealed-Max-Type-Deep-Groove-Bearing-22x31x7mm/product_info.html and turn a bush up to adapt

I agree, it is becoming more and more appealing for a delrin bush.
Especially as I've just taken the original bearing apart to find it is one line of very small balls. The outer race is made of two halves of metal with rubber around then the outer bit you can see in the photo.
So it's like a hybrid bearing. IE, it's a bush and a bearing in one.
Is polybush a similar material to this delrin?

Bobsticle · Feb 9, 2021

Turn down the shaft to an English size.

Ruddy French

harry jacob · Feb 9, 2021

Have you checked https://www.raptorsupplies.co.uk/
looks like they have wide range and they source obsolete parts too.

Nodge68 · Feb 9, 2021

currymunster said:
Is polybush a similar material to this delrin?

No Delrin (acetal) is an engineering plastic, which has very good self lubricating properties, so is very low friction, and has low wear characteristics too. It's like a slippery Nylon if you like, only is better to machine to the size you want.

Ratae · Feb 9, 2021

Plenty of delrin on ebay & not expensive.
You just need to find a man with a lathe to turn it - small local engineering company for example?

currymunster · Mar 5, 2021

Well everyone, my friend has finished the delrin bush and I am rather pleased with it. Obviously I still need to fit and I will report back but it looks good and only cost me the delrin off eBay.
My friend did it for nothing. He's retired and was thankful of something to do.
I might get him some of that delivered beer you can get these days.
Thanks for everyone's help so far.....

rob1miles · Mar 5, 2021

Result. But next time you get an "advisory" leave it alone and see that they say next year. In my experience "advisories" seem to come and go.

Bearings

currymunster

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Bobsticle

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harry jacob

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Nodge68

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rob1miles

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