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From: raden on 1 Apr 2007 16:11
In message <Xns9905BD1A2FF9471F3M4(a)127.0.0.1>, Alex Coleman
<no(a)no-email.com> writes
>On my rather old tube of 'regular' Araldite it says 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?
>
>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?


Don't forget to roughen up the surface and apply the araldite before it
gets a chance to start oxidizing to any extent

Suitable? Probably, suck it and see

--
geoff
From: Brian on 1 Apr 2007 16:23

"raden" <raden(a)kateda.org> wrote in message
news:o3cm8xcKHBEGFw01(a)ntlworld.com...
> In message <Xns9905BD1A2FF9471F3M4(a)127.0.0.1>, Alex Coleman
> <no(a)no-email.com> writes
> >On my rather old tube of 'regular' Araldite it says 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?
> >
> >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?
>
>
> Don't forget to roughen up the surface and apply the araldite before it
> gets a chance to start oxidizing to any extent
>
> Suitable? Probably, suck it and see
>
> --
> geoff
I would do the same to the plastic too. Many types of epoxy resin (Araldite
is just a trade name) do not adhere at all well to many plastics. Roughen
the surface to help it key.


From: The Medway Handyman on 1 Apr 2007 16:52
Alex Coleman wrote:
> On my rather old tube of 'regular' Araldite it says 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?

When you say 'tube' of Araldite - do you mean 'tubes' ? AFAIK all Araldite
is 2-part.
>
> 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?

The plastic might cause more trouble than the aluminium.


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257


From: Dave Fawthrop on 1 Apr 2007 17:16
On Sun, 01 Apr 2007 18:35:22 +0100, Alex Coleman <no(a)no-email.com> wrote:

|!On my rather old tube of 'regular' Araldite it says 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?
|!
|!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?

Yes! But!
Everything needs to be *real* flat, *real* smooth, and *real* clean, and
not have release agent on it, also both bits need to be rigid. We used to
do it for aircraft components. So if you can do the first two bits within a
few thou (you can measure to 1/10mm can't you), degrease the aluminium and
roughen up the plastic with fine emery and degrease, to get rid any release
agent, get some *new* araldite, then it *may* work, otherwise give up the
idea of araldite.
--
Dave Fawthrop <sf hyphenologist.co.uk> 165 *Free* SF ebooks.
165 Sci Fi books on CDROM, from Project Gutenberg
http://www.gutenberg.org/wiki/Main_Page Completely Free to any
address in the UK. Contact me on the *above* email address.

From: Tunku on 1 Apr 2007 17:30
Alex Coleman <no(a)no-email.com> wrote in news:Xns9905BD1A2FF9471F3M4@
127.0.0.1:

> On my rather old tube of 'regular' Araldite it says 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?
>
> 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?

Something like Evostick impact adhesive may be more suitable, it remains
flexible.

--
Tunku

"caution : traces of irony and other metallic objects may be present in
the above post"
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