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Re: Repair of tone hole in plastic clarinet

Author: Matt74
Date: 2017-09-28 03:24

I think machining a new hole would be awesome. That said...

Epoxy would probably work. If the epoxy is a DIFFERENT color than the plastic (and softer), it will be easier to remove the excess accurately. I did this a lot in picture frame restoration, with gesso and other materials. (For example, JB Weld is grey, and is easy to cut before it hardens completely. I imagine you could color it when dry. I don't know how well it would bond to resin.)

Would it be possible to do the reverse of undercutting? Assuming the hole is the correct size where it meets the bore, you could leave that exactly the way it is. Then, remove material from the outside with a taper, making the hole on the outside bigger but round and sharp. If you only tapered the outer 1/2 of the tone hole it might not change the intonation too much. I would think a larger hole that is sharp would be preferrabe to one that is beveled.

You could do both. Fill the worst and ream what's left. It would enlarge the hole less, and make finishing the unhardened epoxy fill super easy.

- Matthew Simington

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