Silver solder Oilite bush

Can I silver solder an oilite bush or will the oil content in the metal prevent bond?

I have made a mistake & it has ended up a little too slack on one half for press fit so silver solder would save wasting the work.

Could one use a loctite, such as bearing grade - which i have- or would that fail too easily

It is for the bush that sits in a pair of sprockets on a layshaft in the middle of the drive from crankshaft sprocket to axle on a PYRTE.

Thanks

Edited By Sam Longley 1 on 14/01/2017 15:20:00

Hello Sam, I would have thought that the oil in oilite would prevent a succesful joint but some grades of Loctite are oil tolerant, the only problem is that I cannot remember which ones! A trawl through their website or even an email would get an answer though.

Brian

I've soft soldered Oilite bushes by heating them until all the oil has run out, then soldered them and soaked the assembly in oil to re-lubricate.

John

Problem is that unles syou pres sthe oilite bush in the bore will be a little oversize as they are designed to compress down to the correct bore when pressed in.

Why not bore out the part say 2mm oversize and silver solder in a bit of something then rebore that to the correct size. Infact you may be able to loctite the sleeve into place and then press the oilite bush into that.

I know of the oilite bush in loctite fitted sleeve idea being used with every success. Darned if I can remember the application tho'. The sleeve was bored to take the oilite bush with the correct amount of compression to produce an accurately sized bore. The assembly was trimmed to length and locitited into the bored out hole. Possibly marginally less accurate than fitting the sleeve then boring in situ but that way the loctite joint isn't subject to machining and bush pressing in loads.

If done with appropriate care there is probably no practical difference in the results whichever way you do it. Doing the sleeve and bush assembly first before fitting is perhaps less vulnerable to irrecoverable Gremilin interference and (un)common shop mistakes.

Clive.

Is a knurl an option? That is what I would try with a slack fit. Loctite would fill the gaps, if nothing else!

I must admit I am learning here. I did not know about the press in fit being required to get the fit to the shaft

Re plugging the bore is an option-- thanks

That might be enough & I do have a coarse knurl but I might distort the bearing

I believe the recommended method of fitting oilite bushes is with a stepped guide tool. First part made a smooth, shake free sliding fit in the hole it is to go in, second part made a touch smaller than the finished size of the installed bush. Second part should be a little longer, 1/16" or a couple of mm is fine, than the bush. First part makes a good gauge for the bore size if your hole measuring equipment isn't really up to the job of making an accurate hole off the dials by direct measurement.

Method of use is to introduce the first part into the hole and apply pressure to the end of the second part. First part aligns things nicely in the hole so when pressure is applied the bush floats back against the pressing device self aligns itself with the hole. It can be pressed in without undue force and no risk of deformation. Helps if there is a slight chamfer on the hole. Oilite bushes aren't very good at resisting deformation forces from being pushed out of line and a re easily cracked or distorted beyond repair.

Like so many things you can get away with less than ideal methods given appropriate care but odds are you will get bitten in the end.

Clive.

.

Could you possibly be the same 'Sam Longley 1' that I responded to on this recent thread: **LINK**

http://www.model-engineer.co.uk/forums/postings.asp?th=123572

.

MichaelG.

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[quote]

Here are more answers about Oilite than you even knew there were questions ...

**LINK**

http://www.bowman.co.uk/products/oilite_technical

Edited By Michael Gilligan on 14/01/2017 20:18:13

Yes - but I will not be using the bushes for the cylinder which was the point of that thread.

Edited By Sam Longley 1 on 14/01/2017 22:02:57

.

But my intention was to give you a definitive reference source for everything you might reasonably need to know about Oilite bushes.

< sigh >

MichaelG.

Sorry, but I missed the bit about silver soldering. Must read it again !!!

I would also point out that if one does not know how to interpret some of  the data on the site then it is not much use. But i will get to grips with it - eventually. Jason's comment about the finished bore reducing in size now explains why my bearing suddenly does not fit the shaft so well & I need to be aware of that in future.

Clive Foster's explanation is also much easier to understand & for that i would thank him

Edited By Sam Longley 1 on 14/01/2017 22:46:17

Points taken, Sam ... I won't be troubling you again.

MichaelG.

Michael

Reading my post again this morning it looked as if I was not grateful of the link & any help you might have offered. I had in fact bookmarked it. It just did not answer my questions very well. I need all the advice I can get.Sometimes the problem is understanding it

It was the   "<sigh>"   that put me off as well !!

Hope we have not ended up as a up a pair of the typical "grumpy old gits one" often gets on some forums.

You never know, you might need to know how to sail a yacht single handed round the Uk one day - & i will be in with the advice like a rat up a sewer

Edited By Sam Longley 1 on 15/01/2017 08:28:52

Sam,

I sent you a P.M. last night

If you haven't got there already: You may find it useful.

MichaelG.

Edited By Michael Gilligan on 15/01/2017 09:20:30

Clive Foster is correct with the method of fitting Oilite bushes. If you solder, or Loctite the bush in place you might as well use a plain bronze bush, because you will have defeated the purpose of the sintered bronze bush by filling the space in it where the oil should be.

Ian S C