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  1. #1
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    Default Best Glue or Epoxy

    What is the best Glue or Epoxy for bonding 2 pieces of metal together, has to be permanent but doesn't have to be particularly strong.
    Shane

    Got the square peg in the round hole, now can't get it out !!

  2. #2
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  3. #3
    BobL is offline Member: Blue and white apron brigade
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    Default

    What are the load/force/torque/vibration/environment exposure requirements?

  4. #4
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    Default Best Glue or Epoxy

    If it doesn’t have to be strong I’d say pretty much any epoxy adhesive. Metal needs to be roughed up well, particularly if it’s aluminium.
    Chris

  5. #5
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    Quote Originally Posted by Auskart View Post
    What is the best Glue or Epoxy for bonding 2 pieces of metal together, has to be permanent but doesn't have to be particularly strong.
    "best" is a very subjective criteria -- especially when teamed with "doesn't have to be particularly strong"

    3M make a range of metal bonding epoxies some of which are claimed to create a bond as strong as that achievable with welding.

    as BobL asks
    What are the load / force / torque / vibration / environment exposure requirements?
    to which I'd add is the "non-load" in tension, compression or shear ?
    regards from Canmore

    ian

  6. #6
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    Quote Originally Posted by BobL View Post
    What are the load/force/torque/vibration/environment exposure requirements?
    It is only a thin SS plate with degree's marked on it being bonded to steel, it sits on top of the steel there are no forces on it at all.
    Shane

    Got the square peg in the round hole, now can't get it out !!

  7. #7
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    Quote Originally Posted by Auskart View Post
    It is only a thin SS plate with degree's marked on it being bonded to steel, it sits on top of the steel there are no forces on it at all.

    In that case any super glue will work. Or if you don't trust super glue, double sided adhesive tape is good.
    Best Regards:
    Baron J.

  8. #8
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    Quote Originally Posted by Auskart View Post
    It is only a thin SS plate with degree's marked on it being bonded to steel, it sits on top of the steel there are no forces on it at all.
    I used Araldite to glue the aluminium top-slide angle marking ring to the slotted cross-slide on my Hercus. It's still there.
    SS is a tougher nut to glue though. Given the SS plate is 'thin' (how thin?) I'd be inclined to use something flexible like Sikaflex 11FC.
    Chris

  9. #9
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    Knowing that it is only a thin sheet of stainless with markings, I'm also thinking double-sided tape or contact adhesive
    regards from Canmore

    ian

  10. #10
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    Default

    silicone..a thin layer should hold it in place

  11. #11
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    Double sided tape mentioned a few times - am vaguely aware of some incredibly strong double sided tapes currently available. A quick google of "strongest double sided tape" yields this

    VHB tape, or Very High Bond tape, is an extremely effective double sided tape that's used in place of rivets, bolts, welds and screws. It's easy to apply, but so strong that it's a significant component of the Burj Al Arab one of the tallest (and arguably the most luxurious) hotels in the world. It flexes like chewing gum and made it a great choice for affixing the cladding of the Burj Al Arab.

    Source : https://www.finecal.co.uk/blog/the-c...ive-tapes.html

    Dont know what you lot might think but intuitively, for me, I'd like to have a few mechanical fixings in that cladding as well.

    In the next 5 years will super strong adhesives mean that I don't have to learn how to weld ?

    or braze ? ie stick a carbide insert down with supersupersupertape ?

  12. #12
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    I have witnessed a test for the sign industry in which two sections of colorbond were fixed by overlapping using VST (very strong tape) the sections on being forced apart resulted in the colorbond tearing before the joint failed

  13. #13
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    The issue with tape is some of the adhesives used will be affected by mineral oils and solvents. I've seen many (mainly Chinese) similar plates fall off equipment through a combination of solvents, rubbish adhesive to begin with, and different expansion rates with temperate changes.

    If the fit is reasonable I use Loctite 680 for this type of thing. Otherwise plain old super glue would probably do the trick

  14. #14
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    Hi Guys,

    stick a carbide insert down with supersupersupertape ?
    I've seen it done ! And I've tried it myself. However in both the demo and when I did it the tool didn't do enough work to get it hot, so I can't say how the tape would stand up to the heat that could be generated. In my case it worked to take the hard surface from a 8 inch salvaged cast iron bar weight, including the raised lettering on the surface.
    Best Regards:
    Baron J.

  15. #15
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    Quote Originally Posted by BaronJ View Post
    Hi Guys,

    I've seen it done ! And I've tried it myself.
    Great Stuff Thanks Baron ! what was was the name of the amazing supertape ?

    The raised lettering would have given a significant thump on the interrupted cut.

    This might herald a new era for shedfolk - sticking things together without learning to weld or braze.

    Bill

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