Metric bearings in imperial wheel rims

[Mark Trueman]

Hi there,

I am looking to buy the following from the usa

problem i have however is with bearing sizes. The O/D of the bearings required for this wheel are 1+3/8 of an inch, which is 34.925 mm. I can source bearings in this country with an I/D of 17mm, which is required for my application, however, the OD of the UK bearing is 35mm.

The question is, will a 35mm bearing fit in the hub that is built to accept 34.925mm bearings? Will it just be a bit of a squeeze to get the bearing in? Will there be any problem with the bearing if it is slightly compressed?

Regards

Mark

[adder1969]

Hmm, you're either a troll or you have absolutely no idea what you're talking about. Wheels mount onto a flange on a hub, in which is contained the wheel bearing. ...or I've missed something completely.

[Mark Trueman]

These are not car wheels, and from the size of the bearing i would have thought that was obvious. These are 8 inch diameter wheels for mounting on a small buggy. The bearings fit into the rims, and then onto a 17mm axle.

[Dave Fawthrop]

|Hi there, | |I am looking to buy the following from the usa | |

||The problem i have however is with bearing sizes. The O/D of the |bearings required for this wheel are 1+3/8 of an inch, which is 34.925 |mm. I can source bearings in this country with an I/D of 17mm, which is |required for my application, however, the OD of the UK bearing is 35mm. | | |The question is, will a 35mm bearing fit in the hub that is built to |accept 34.925mm bearings? Will it just be a bit of a squeeze to get the |bearing in? Will there be any problem with the bearing if it is |slightly compressed?

Your local bearing shop can get whatever you want, metric or imperial.

[Mark Trueman]

But not, as it appears, a bearing with an imperial OD of 1+3/8 and a metric ID of 17mm. Well at least not the company i tried to get bearings from anyway. Maybe i will have luck elsewhere, but was given the impression that this bearing would not be available anywhere.

Cheers

Mark

[Dave Fawthrop]

| |Dave Fawthrop wrote: | |> On 23 Oct 2006 07:02:00 -0700, "Mark Trueman" |> wrote: |>

|> |Hi there, |> | |> |I am looking to buy the following from the usa |> | |> |

|> | |> |The problem i have however is with bearing sizes. The O/D of the |> |bearings required for this wheel are 1+3/8 of an inch, which is 34.925 |> |mm. I can source bearings in this country with an I/D of 17mm, which is |> |required for my application, however, the OD of the UK bearing is 35mm. |> | |> | |> |The question is, will a 35mm bearing fit in the hub that is built to |> |accept 34.925mm bearings? Will it just be a bit of a squeeze to get the |> |bearing in? Will there be any problem with the bearing if it is |> |slightly compressed? |>

|> Your local bearing shop can get whatever you want, metric or imperial. |> -- |> Dave Fawthrop Google Groups is IME the *worst* |> method of accessing usenet. GG subscribers would be well advised get a |> newsreader, say Agent, and a newsserver, say news.individual.net. These |> will allow them: to see only *new* posts, a killfile, and other goodies. | |But not, as it appears, a bearing with an imperial OD of 1+3/8 and a |metric ID of 17mm. Well at least not the company i tried to get |bearings from anyway. Maybe i will have luck elsewhere, but was given |the impression that this bearing would not be available anywhere.

will probably tell you.

IIRC .075 mm or 3 thou is a very heavy drive fit. Google for "drive fit" "push fit", We used to have tables of such things, but I can not find them on Google.

[6]

Spin the hub in a lathe and ease out the 0.003" with emery. Alternatively, if it's not a high speed bearing or something under extreme load you can warm up the hub (If poss with a blowtorch) and press the bearing in.

3 thou is quite a good interference fit.

I would ease the hub diameter out myself.

[Doki]

Take the extra bit of metal off the ID of the wheel so you can use standard bearings?

[adder1969]

That'll teach me to speed read postings :-)

[The Natural Philosopher]

That sounds well within 'tap it gently with a hammer' range, or 'heat the housing with a blowlamp first'

[The Natural Philosopher]

You have missed the actual URL which shows an 8" split rim alloy wheel with integral bearing housings

[The Natural Philosopher]

So ream out the wheels...if you can't take off .075mm with a bit of emery you don't deserve to be posting in UK.d-i-y

[Roger Mills]

3 thou on the diameter - nearly 10 on the circumference - is certainly an interference fit. Good chance of cracking the aluminium wheel if you force it in. Same with heating it - it may crack when it cools. Better to machine it out, as you say.

[Mark Trueman]

I know absolutely nothing about metalwork, its not something i have ever had to do. (does this lack of knowledge in one area mean that i dont deserve to post here? its never stopped dimm and his dual combi bollocks)

Is it worth getting a sheet metal fabricators (i know one) to do this for me, or is it something that can be done by hand? I suppose i'll get the tinned reply, "if you have to ask then its best to get it done by a pro", but if not, do i need to buy any special tools to do this.

[Dave Plowman (News)]

An old fashioned jobbing garage would be what you want - king pins etc had to be re-bushed at one time and they'd have adjustable reamers.

[Aidan Karley]

If you can get one bearing thats got slightly too much metal, then you can get two with the same ease. So take the metal off the easy-to-replace part, not off the hard to replace part.

[Doki]

1) Isn't turning a bearing in a lathe going to be a pain in the arse. 2) Do the wheel and you only have to do it once, do the bearings and you'll need to do it every time you change them.

[Dave Fawthrop]

|In article , Doki wrote: |> > The question is, will a 35mm bearing fit in the hub that is built to |> > accept 34.925mm bearings? Will it just be a bit of a squeeze to get the |> > bearing in? Will there be any problem with the bearing if it is |> > slightly compressed? |> |> Take the extra bit of metal off the ID of the wheel so you can use standard |> bearings? |>

| If you can get one bearing thats got slightly too much metal, then you |can get two with the same ease. So take the metal off the easy-to-replace |part, not off the hard to replace part.

Bearings are Hardened Steel and an absolute swine to machine.

[The Natural Philosopher]

Yes. Bearing shells are case hardened steel and most tools will bounce straight off. You need to hone them. Non trivial

Whereas mild steel alloy or bronze would be likely for the housings, and its easily cut or abraded.

[Pete C]

Hi,

Why not buy the bearings from the US too, don't the above company supply them as an option?

cheers, Pete.