Looking for inch-sized angular contact bearings.

[Mcgyver]

nice work Peter

[nickel-city-fab]

Wow. Way to go! I would have been afraid to try a 030 wall thickness. Looks like it worked great!

[The Metal Butcher]

Very nice improvement!

[Peter.]

Just to wrap this up I ended up using a pair of 7206 bearings as suggested by Cameron. I did find several sources of original sized bearings but none were any sort of precision in fact they were all NOS wheel bearings for old British cars.

So I purchased some NSK 7206 angular contacts and made an adapter sleeve to house them. I made the bearings a sliding fit in the sleeve and the sleeve a light press fit in the housing. Wall thickness is .030"



After that I made another sleeve for the spindle with 1" press fit bore and 30mm sliding fit OD (no picture of that I'm afraid). Both sleeves have a 6.1mm lip on the back side to make up the thickness difference between the 16mm and 3/4" width bearings.

I threw the lot together and dressed a wheel for a test cut. I think the difference is very plain to see, the near-side finish is with the old bearings all full of fish scales.



Overall, I'm very pleased!

[The Metal Butcher]

on a side note, do you know where the skate bearing confusion came from? a company called themselves "abec 9" and sold the bearings.

It lies and deception. My penny board bearings claim to be Abec 7. My ass they are. They've gotten rusty and been cleaned up and put back to work a few times now, lots of wear and wobble in each. Still works fine because it doesn't matter. Just an obnoxious method to sell them to the kids.

[dian]

on a side note, do you know where the skate bearing confusion came from? a company called themselves "abec 9" and sold the bearings.

[Mcgyver]

Just like ABEC 9 skate bearings? No, my view (in part arrived at from direct personal experiencing manufacturing there) is that manufactures information provided on quality and ratings are driven what the market asks for not the actual quality. Its a business culture thing. Maybe some are better than others but that issue is why the world pays more for quality brands. I would consider Chinese bearings of unknown quality, possibly suitable for less critical applications, but risky for a grinder spindle. That is changing as they buy into branding, but I don't think its there yet to the point of trusting claims of quality.

I'll say no more, shouldn't have taken Peter's thread off topic

[dian]

know what? if they were to p3 standarts? of course i cant measure it, but if the bearing is from a big chinese manufacturer, looks flawless, is well marked and originally packed im led to believe its genuine. if you want to suppose they are rejects then you have to exclude all online sources, go to your dealer and pay $1000 for the pair. the same with any "surplus stores" and discounted products in general.

[Mcgyver]

. i got some p3 bearings a while ago.

How would you know?

[dian]

"Won't be getting anything from Aliexpress for a spindle bearing I'd rather hold out for a NOS quality unit."

you might be wrong there. they have good deals on high quality bearings from time to time. i got some p3 bearings a while ago.

[djc]

You could also try Ransome and Marles as they have good sources for imperial stuff. https://ransomeandmarles.co.uk/ Be sitting down when they quote you.

[Peter.]

I can highly recommend this outfit:

http://www.buffalobearings.com/

They have a way of being able to find all the unicorns and oddballs, among other things... nice selection in stock and they've been around serving local industry for quite a while. Very knowledgeable crew.

Thanks, I have sent them an email.

Is this anything?
https://shop.eriks.be/en/bearings-ba...jt1m-13009840/

That looks very promising. I will contact them and see what the precision rating is (and if they have a pair). Thanks.

[QSIMDO]

Is this anything?

https://shop.eriks.be/en/bearings-ball-bearings-angular-contact-ball-bearings/single-row-angular-contact-ball-bearing-imperial-dimensions-mjt1m-13009840/

[nickel-city-fab]

I can highly recommend this outfit:

http://www.buffalobearings.com/

They have a way of being able to find all the unicorns and oddballs, among other things... nice selection in stock and they've been around serving local industry for quite a while. Very knowledgeable crew.

[Peter.]

In the UK, this firm is open for orders over the web, they sell both metric and imperial bearings.
https://simplybearings.co.uk/shop/Pr...514/index.html

Thanks Mart but these sizes are long out of production

Not sure if tapered roller bearings would suffice - like these: https://www.bearingscanada.com/15100...0-s-15250x.htm

I guess the way the existing bearings are preloaded would be a factor.

Geoff

Thanks Geoff. Quite unusually, the originals are pre-loaded by the wheel clamp nut, so you wouldn't want to run the machine without a wheel fitted. I'm not sure that a taper bearing will have the necessary precision and the width being greater means the bearing cap would need modifying. Thanks for the link though.

You might find something here-

http://www.consbrgs.com/search.html

Cheers for that link Weirdscience. I tried all manner of combinations of sizes but drew a blank.

I think I'd be inclined toward the sleeves as well, but I don't like how thin they are with a 7206...a 71906, 71807 or 71907 would all fit and have a small profile letting you have a little more solid sleeve. Might be a better choice.

The other thing is what class do you want and whats readily available. P4's for example are readily available as AC's but can be more of a hunt in other formats, i.e. deep groove. At least that's what I found is the case if you're shopping at the major firms like SKF. Barden or others might have more, but they're not around the corner and can be very expensive

P4 should be fine. TBH the originals are so worn they still run with full pre-load and a 0.0015" shim between the outer races so even a trailer wheel bearing should be an improvement

I'll check out those other sizes see what's available. Thanks.

in any case check out ebay, aliexpress etc.

Trust me I'm scouring ebay. Won't be getting anything from Aliexpress for a spindle bearing I'd rather hold out for a NOS quality unit.

Thanks for all the replies guys I appreciate it.