"Derek Geldard" wrote in message
...
On Sun, 01 Apr 2007 18:35:22 +0100, Alex Coleman
wrote:

On my rather old tube of 'regular' Araldite it says it is ok for metal.


It is OK for metal.

If this is so then why would I ever use one of those 2-part adhesives
sold specially for metal? I mean the sort of thing that is usually
coloured grey and can often be bought in car accessory shops?

Sundry other reasons. If it's what I'm thinking about they contain a
lot of inert filler, it helps filling holes and gaps. The grey colour
is to convince the proles they can fix holes in grey metal with it.

I need to glue an aluminium ring (about 1.5 inches diameter and about
4mm thick) to a plastic base. There will be some light to moderate
stressing of this arrangement when it is in use.

I figured the Araldite was just fine for the plastic but what about the
metal?

It's fine on aluminium per-se.

Less so on plastic, and it depends which plastic.

Set araldite is brittle, if the whole assembly will deflect under load
the joint may break up.

I use a little less hardener if I think a bit of 'give' is needed.