Araldite loose BB shell

warrior4life

I have an old frame I've had sitting around and I'm building it as winter bike.
Its has a BB86 but its slightly out of tolerance and is a little too wide so the BB moves ever so slight, I'm planning on using a wheels manufacturing BB and using araldite to full the gaps.

Has anyone done this before? If so what was the outcome?

jermas

Using the Wheels manufacturing BB is a good idea. Loctite 660 http://www.loctite.co.uk/loctite-4087.htm?nodeid=8802627715073 might be better than epoxy. It fills gaps in worn/oversized parts, but It'll make it problematic to remove the BB in future if needed.

sungod

yeah, avoid epoxy

loctitie 641 (low) or 609 (medium) are the usual options for a bb, rather than 660 which is 'high' strength, if you use any loctite read the technical sheet first to see if you'll need primer

even 609 may be too much, i've used it in the past and bearing removal needed a heat gun to weaken it enough to hammer out (without heat, a big hammer and a bearing extractor wouldn't touch it)

an alternative for a loose fit is ptfe tape

wheels make different types of bb, i assume you plan on the type that screws together, in which case i'd just install it as they instruct and see how it goes - i used one to allow a gxp power meter on a bb30 frame, it's been really good so far

check the bb shell has the required through clearance, no protruding bits or cables in the shell that would block the adaptor

warrior4life

I fitted a wheels BB and still had severe rocking of the BB.
Decided to use araldite rather than bin the frame. So far its perfect.
I can always tap the bearing out of the wheels screw in BB if they need changing.
If I change the cables I'll have to be super careful and I'll make sure I use a guide when removing the old cables so I can get new ones in.

warrior4life

4 weeks of hard riding and the BB is rock solid! Fantastic.

I've spoken to a specialist in glues and adhesives, the Loctite 630 is definitely not one to use, its used for metal to metal, the same materials.
I was told to use a 2 part adhesive, not araldite as it can crack but something different, I cant remember the exact technical name.

Anyway as it stands I've saved a £2500 frame (for now).

sungod

this is 2-part, i used it for bonding cf when making a lightweight hanger alignment tool, it's certainly tough

http://www.easycomposites.co.uk/#!/resi ... esive.html

jermas

I wrongly presumed it was metal to metal being an old frame for winter. Anyway if it's held up for 4 weeks hopefully it should last.