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Old 20-06-2021, 12:15   #1
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Securing set screw

Any suggestions on securing a metal set screw in a composite housing on wind instrument set? I know some materials are not compatible with plastics.
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Old 20-06-2021, 13:15   #2
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Re: Securing set screw

That's a very briefly described situation. What I'm envisioning is that you have a plastic instrument housing with a stripped thread. Unusually, the vision includes that screw not holding the case together, but holding a shaft? Or, is it the more usual case that a screw that holds a case together is stripped, and "set screw" is a verbal slip?

Let's look at the latter case. I don't know what tools you have available. With mine, I would fill the stripped thread hole with epoxy, drill it, and tap it. Actually, I might drill it oversize first, so more epoxy would go in, and then drill it and tap it.

If you don't have wire-size drills and an approriate tap, then I'd be inclined to sink the screw, covered in wet expoxy, into the hole, clamp the whole thing together tightly, and glue that sucker in place. Getting the screw out later might be another adventure.
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Old 21-06-2021, 01:33   #3
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Re: Securing set screw

Greetings and belated welcome aboard the CF, Foxy.

tkeithlu’s sollution is a great way to re-form stripped bolt threads, but I suspect you’re seeking a thread locker, compatible with plastics:
Plastic glue: Everything you need to know ~ Loctite
https://www.loctiteproducts.com/en/k...stic-glue.html
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Old 21-06-2021, 06:25   #4
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Re: Securing set screw

Quote:
Originally Posted by GordMay View Post
Greetings and belated welcome aboard the CF, Foxy.

tkeithlu’s sollution is a great way to re-form stripped bolt threads, but I suspect you’re seeking a thread locker, compatible with plastics:
Plastic glue: Everything you need to know ~ Loctite
https://www.loctiteproducts.com/en/k...stic-glue.html
Thanks for your responses. GordMay, you are correct, I simply want to prevent set screw from loosening. Regular "blue" Loctite seems to be incompatible with plastics so looking for alternative.
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