Author Topic: ref bearings: what do you call these....?  (Read 129 times)

Tinworm

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ref bearings: what do you call these....?
« on: 19 Nov 22, 11:26 am »
Most of the bearings we use are for working around a shaft. But what do you call those bearings which are loaded from above, as for instance in a swivelling caster or the headset of a motorcycle? And can you buy them in their own circular channels (like chopping the top of a motorcycle headset off), not just as balls in a cage?
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

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Tinworm

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Tinworm

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Re: ref bearings: what do you call these....?
« Reply #2 on: 19 Nov 22, 11:55 am »
interestingly, when searching, the channel I was talking about is the race, not the caged bearings themselves

also, when searching, what they call a headset on a bicycle is called a headstock on a motorbike
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

StefanN

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Re: ref bearings: what do you call these....?
« Reply #3 on: 19 Nov 22, 03:46 pm »
Not 100% sure what forces you're trying to support but do you possibly mean angular contact or taper bearings?  They support rotation of (or around) a shaft  and forces along the shaft.  Does this help: http://fractory.com/types-of-bearings/ ?

Tinworm

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Re: ref bearings: what do you call these....?
« Reply #4 on: 19 Nov 22, 04:17 pm »
Not 100% sure what forces you're trying to support but do you possibly mean angular contact or taper bearings?  They support rotation of (or around) a shaft  and forces along the shaft.  Does this help: http://fractory.com/types-of-bearings/ ?

Thanks for the link. I was thinking about the friction between the top of a pair of motorcycle front forks and the bottom of the headstock, and the fact that this is the centre around which the bike steers. The weight of the front of the bike bears down on this point, while at the same time the bike must be able to steer. This is the same situation as the one that I have, sort of. My car bears down on the top of my spring, which pushes up from the centre of my axle, which rotates around this centre. Without the spring, steering is easy. It is a lot harder with it in position
« Last Edit: 19 Nov 22, 04:59 pm by Tinworm »
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter


Tinworm

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Re: ref bearings: what do you call these....?
« Reply #6 on: 19 Nov 22, 06:44 pm »
Thrust bearing is what you're after

Oh Brilliant!  I think you are right!
Thanks very much Chris.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Tinworm

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Re: ref bearings: what do you call these....?
« Reply #7 on: 19 Nov 22, 08:31 pm »
Thrust bearing is what you're after

My next challenge will be finding a way to retain them to stop the 3 layers wandering about horizontally. Any thoughts?
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Chris Brown

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Re: ref bearings: what do you call these....?
« Reply #8 on: 19 Nov 22, 08:51 pm »
Match the bore to the centre tube/bolt, and use a washer of the same bore but large enough for the spring to sit on it between the bearing and the spring.

Tinworm

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Re: ref bearings: what do you call these....?
« Reply #9 on: 19 Nov 22, 10:04 pm »
Match the bore to the centre tube/bolt, and use a washer of the same bore but large enough for the spring to sit on it between the bearing and the spring.

I know that sounds obvious and I know that is how they are designed to be used, but I think I may have to make a bushing between the centre tube and the bearing/ washer ID, as the spring OD is a fair bit from the tube. I suppose there needs to be a tiny bit of clearance between the tube and the bearing ID anyway, to avoid lateral rubbing?
« Last Edit: 19 Nov 22, 10:19 pm by Tinworm »
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Chris Brown

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Re: ref bearings: what do you call these....?
« Reply #10 on: 20 Nov 22, 11:24 am »
I obviously didn't make myself clear, the bearing needs to be a sliding fit on the tube, and fitted with it's two washers. Then an additional larger washer needs to be fitted with a bore to suit the tube, and big enough to carry the spring, rough sketch attached.

Tinworm

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Re: ref bearings: what do you call these....?
« Reply #11 on: 20 Nov 22, 11:23 pm »
I am very grateful Chris. You saved the day. Thanks for the sketch too!
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Tinworm

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Re: ref bearings: what do you call these....?
« Reply #12 on: 20 Nov 22, 11:45 pm »
I might even take the opportunity to make a sliding spring shroud like the original, with the lower shroud (the inner of the two) attached to the large washer and with the upper, outer shroud sliding down over the top of it.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter