 The Clarinet BBoard
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Author: m1964
Date: 2021-10-27 03:48
Attachment: 043.JPG (1220k)
Hi all,
thank you for your replies to my previous post about cleaning water damaged R13.
After I took off all the keys, I noted two superficial cracks on the lower tenon that originate from the tenon ring on the upper part of the tenon.
I also found another crack through the rim of the bell tenon. The crack goes through the rim and extends into the part normally covered by cork, by about 5mm.
The picture is attached, although the only visible portion is on the rim but the crack does go further in, by about 5-6mm. (I was afraid to spread it too much).
I am not sure that superglue alone will hold it. If I understand correctly, the "proper" repair would be to place a band of carbon fiber around the tenon, over the area covered by the cork.
I, however, was thinking of placing a thin wire strand(or two strands) around and soldering the ends together. After that, the cork would cover the repair.
Since there no forces on this tenon besides when attaching or removing the bell, I think such repair (with a wire strand) would hold well.
Please advise if you think that super glue alone will be fine.
Thanks a lot.
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Author: jdbassplayer
Date: 2021-10-27 04:32
Realistically I think glue alone is probably fine for a tenon. Yes theoretically if you want to be 100% certain it will never open up again a carbon fiber band is a good idea, but I think with a good glue repair there’s probably a 99% chance it will be fine for the life of the instrument.
If you wanted to experiment with bands though I would not try to solder anywhere near the wood. I would buy some carbon fiber tow and epoxy and do it right.
-Jdbassplayer
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Author: m1964
Date: 2021-10-27 04:55
jdbassplayer wrote:
> Realistically I think glue alone is probably fine for a tenon.
> Yes theoretically if you want to be 100% certain it will never
> open up again a carbon fiber band is a good idea, but I think
> with a good glue repair there’s probably a 99% chance it will
> be fine for the life of the instrument.
>
> If you wanted to experiment with bands though I would not try
> to solder anywhere near the wood. I would buy some carbon fiber
> tow and epoxy and do it right.
>
> -Jdbassplayer
Long time ago, I used a thin piano string to fix cracks in barrels or joints.
With that, I knew the spring would never allow the wood to expand.
We did not have carbon fiber then
What grade tow would you recommend-1K, 3K?
thanks
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Author: m1964
Date: 2021-10-27 10:12
jdbassplayer wrote:
> I forget what kind I have, usually I just break it up into
> smaller bundles anyway since I like to make my carbon fiber
> bands fairly thin. Maybe 1k in that case?
>
> -Jdbassplayer
Thanks- what instrument is in the picture?
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Author: jdbassplayer
Date: 2021-10-27 17:56
It’s an old Royal clarinet. There was no reinforcement in the socket ring so it developed a crack.
-Jdbassplayer
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Author: m1964
Date: 2021-10-27 20:06
jdbassplayer wrote:
> It’s an old Royal clarinet. There was no reinforcement in the
> socket ring so it developed a crack.
>
> -Jdbassplayer
What a surprise...the carbon fiber string will fit there perfectly.
Thanks for sharing
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