Control knob screw thread

Discussion in 'Tele-Technical' started by 1955, Sep 7, 2018.

  1. 1955

    1955 Poster Extraordinaire

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    I have some aftermarket control knobs, one had a stuck screw and I couldn't get it out. Ended up mangling the screw a few years ago and likely the hole where it went in.

    Was going to just toss them, but what the heck.

    These are those heavy knurled knobs and was thinking of drilling the bad one out, but not sure if it would require re-thread epoxy or how to go about it the right way.

    Not caring about how nice it will look, just want a functional screw to tighten it to the solid pot shaft.

    I would appreciate any feedback, thanks!
     
  2. Vizcaster

    Vizcaster Poster Extraordinaire

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    You might consider drilling out the hole to the next size screw and then tapping the hole for that thread. i don't see any way that epoxy would allow you to have a functioning set screw.

    A machinist's thread-checking card is a very useful reference tool. It has holes of different sizes and thread pitch so you can check the size of an existing screw. In your case, it would also provide you with the nominal hole size drill that you'd want to use for that next size up before you tap the threads.
     
    1955 likes this.
  3. 1955

    1955 Poster Extraordinaire

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    Thanks a lot, Vizcaster, very helpful!
     
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