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Author Topic: what adhesive for PTFE  (Read 8539 times)

monarch

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what adhesive for PTFE
« on: September 11, 2009, 08:26:32 pm »

Hi All
Need to glue some ptfe to metal, but understand that this not an easy substance to fix.
Has anyone successfully glued PTFE and what did you use.
Any appreciated


Lionel
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craftysod

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Re: what adhesive for PTFE
« Reply #1 on: September 11, 2009, 08:44:36 pm »

If you could give a bit more information why you want to glue ptfe to metal,there maybe another alternative of doing the job you require.
I would personally use a 2 part glue,wait till it starts to go off/sticky then apply ptfe.
check first on glue and ptfe that there is no reaction.
Or contact starlock on here as he makes glues and give you more info
Mark
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monarch

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Re: what adhesive for PTFE
« Reply #2 on: September 11, 2009, 08:54:43 pm »

Hi
I am making some new PTFE bearings for the end of the propshafts fitted to RTR Southampton tug. I think the shaft is some sort of plastic but, would like to know what adhesive to use on plastic and metal for future use.

Lionel
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HS93 (RIP)

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Re: what adhesive for PTFE
« Reply #3 on: September 11, 2009, 09:06:21 pm »

try five star adhesives  http://www.modelboatmayhem.co.uk/forum/index.php?action=profile;u=1214   www.starloc.eu  www.shop4glue.eu


send him a PM or pop on the site, he has a special glue for it..

peter
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monarch

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Re: what adhesive for PTFE
« Reply #4 on: September 11, 2009, 10:04:22 pm »

Hi Peter
Looks interesting will give it a try.  Have you used it and if so what where you're imprestions?

Lionel
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HS93 (RIP)

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Re: what adhesive for PTFE
« Reply #5 on: September 11, 2009, 11:12:19 pm »

Not used the ptfe glue but used some of his other products and they did what they where supposed to, one is the flexi epoxy very good he has been going a long time as a business. email him he is helpfull.

Peter
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derekwarner

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Re: what adhesive for PTFE
« Reply #6 on: September 11, 2009, 11:54:56 pm »

Monarch.......PTFE material does not absorb water but is near impossible to glue or secure as a bushing for a rotating shaft....but stay away from nylon [which can be glued] as nylon will absorb water =  >>:-( the bushes will grow & tighten on your prop shaft - Derek
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Derek Warner

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Circlip

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Re: what adhesive for PTFE
« Reply #7 on: September 12, 2009, 11:17:24 am »

For bearings in water, you can use Nylon 66.

   Regards Ian.
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tobyker

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Re: what adhesive for PTFE
« Reply #8 on: September 13, 2009, 12:00:15 am »

If you made a PTFE bush and then roughened the outside of it, could you not stick it into a (brass?) tube with plastic padding? The roughening would have to be fairly coarse to key the padding to it, bit I should think it could be done.
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derekwarner

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Re: what adhesive for PTFE
« Reply #9 on: September 13, 2009, 12:42:24 am »

Monarch & Circlip .....my previous bad experience with nylon was in the outboard stern tube bush running a 0.250" precision brass rod - I found the inboard bush did not swell or grow with the DowCorning rubber grease, however the outboard bush grew & the result after a few hours was a far higher current motor draw

The long term fix was a replacement stainless steel shaft & "Sinterlite" bronze bushes soldered into the tube.............there is also a manufacturer's very simple process  O0 for reactivating a "Sinterlite" bush that has been subjected to the heat of flame soldering.....Derek

http://machinedesign.com/BDE/materials/bdemat2/bdemat2_29.html
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HS93 (RIP)

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Re: what adhesive for PTFE
« Reply #10 on: September 13, 2009, 02:51:02 am »

SHG do Acetal for bearings and they are just a push fit, not seen any come out yet, also they have Glacier bearings which I have started using and cannot comment on yet as they have not had long enough trial but up to now with a LOT of revs they are holding up.

http://www.shgmodels.com/acatalog/       page 44

Peter
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Circlip

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Re: what adhesive for PTFE
« Reply #11 on: September 13, 2009, 11:02:09 am »

You're quite right re the Nylon Dereck, over twenty years since I played with it, don't recall (But didn't need to look for it) 6/12, only ones I had were 6 and 6/6, the second one being lower water absorbancy.

   If yer "Sinterlite" translates to our "Oilite", I described the method of both machining, soldering and re-impregnating on here about 18 months ago.

  Regards  Ian.
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derekwarner

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Re: what adhesive for PTFE
« Reply #12 on: September 13, 2009, 12:14:57 pm »

Yes Ian......I am sure our OZ "Sintalite" translates to your UK "Oilite", or powdered & sintered bronze infused granules with oil under temperature + pressure......or powder metallurgy +  O0........ one of the interesting points is the dimensional accuracy

I am relatively new to Mayhem & have not read your previous posting re soldering sintered bronze bushes into brass stern tubes......although from your comments today suspect very similar thoughts etc :-)) regards Derek
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