You need a small bottle of loctite bearing retainer, yellow guey stuff but made exactly for your application.

I interpreted 18 th" as 18 thou, still too much for ordinary loctite AFAIK. They do a "Quickmetal" goop for worn components, but it's expensive. I've never used it.

I think I'd bore bigger and fit a sleeve if possible, as suggested above

Knurling is an old bodge to make things bigger. Make up a boring bar with one wheel on the end.

Best bodge – do as Mike says or bore the hole out well oversized like 1/8 over then machine up an insert ring that matches the oversize bore and has its bore well undersized, loctite and a light press fit into oversize housing then bore that out to match the bearing .

desperate bodge – use some 0.008 thou feeler gauge strip or some shim material to make an infill ring that sits in the oversize hole then using ample bearing retainer on all surfaces push the bearing into the infill ring / housing assembly , you have to use 0.008 thou as you dont want a press fit as it will drag the shim in with the bearing if you try to press it in – i prefer the first option as it is more reliable and yields a neater repair .

@Martin XD is correct as the gap to be filled is annular 0.008 feeler would work well. Think taking a cut of 0.5mm on the lathe dial and finding the bar 1mm smaller in diameter. Same principle, sorry if this is egg sucking to you but to others it may not seem so clear. Regards

You could also buy some of those rings with pressed in dimples to fit the gap but you would then have to machine the hole again to the size to fit one. I dont know what they are called but have seen them on motor bearings.

I'm afraid that I am with Clive on this one. Maximum gap fill on diameter for LOCTITE 641 is quoted as 0,2mm   or  0.008" . I don't think you would achieve a satisfactory bond at 0.018" oversize on diameter.

LOCTITE 660 is an alternative, but expensive.

Personally I would be looking to sleeve and rebore if possible.

Have a look at the link to the brochure, see what you think.

**LINK**

Edited By Neil A on 07/12/2017 12:07:09

Edited By Neil A on 07/12/2017 12:07:55

So are you saying you have the original hole and a new one bored 0.018" higher in which case you will not need to fill the top but will have a max gap of 0.018" at the bottom.

In which case I think your best option is to bore alarger hole in the correct position so that all trace of the old hole is removed and then sleeve it or find a bearing with larger OD

Edited By JasonB on 07/12/2017 13:26:45

Similar problem on here recently with over sized bore. The concensus then was to rebore the hole, plug and rebore in its correct place. If the bearing is used as a loaded support then it requires a tolerance bore/shaft as per catalogue to achieve the correct fit for the loads being applied. Applying glue of any kind in an oversize hole cannot give positional accuracy or bearing fit if the hole is not a fit in the first place. But if the bearing is non critical, just there as a support of a free shaft, then you would be ok.

Mike Poole- the op has stated that his hole is bored off centre as Jason drew up.

Tolerance rings WILL NOT fix off centre holes. They can take up undersize holes bored on correct centres.

I realised that Jeff, the point I was making is that a tolerance ring is useful when there is not much meat in the housing to fit a conventional type of sleeve. The housing would need another visit to the lathe to make a fully concentric housing. I personally would prefer to only use the adhesive solutions when the fit of the housing is insufficient to prevent rotation of the bearing. Despite impressive claims for gap filling I don't feel this is a job for adhesive. I did say the housing needed to be true in my post.

Mike