 The Clarinet BBoard
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Author: GAA1993
Date: 2011-12-19 22:32
I own a Noblet Bb Clarinet, but it is cracked at the rear ends of the body joints.
I have heard about pinning which, correct me if I am wrong, involves screwing a small pin-sized screw through a bad crack and pulling the wood together so that it does not expand so much?
The other method I have heard about is filling, which may be preferable in this situation because the cracks are not so deep or wide. They are rather slim and could possibly filled with super glue. My Dad suggested wood glue. However, I do not know about the property differences of the two and so I cannot say anything definite. I want to ask if there is a filling method which uses a substance that can expand or shrink with the wood while simultaneously keeping the wood from splitting further. Better yet, if you know of other filling methods and their properties, please post them in response.
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Author: Chris P
Date: 2011-12-19 22:49
Superglue is the best as it will wick into the crack by capillary action and form a permanent bond provided the crack isn't contaminated with oil, grease or wax. You can scrape out the line of the crack with a scriber to make it deeper for the glue to run into better.
Then leave it to dry (you can sprinkle grenadilla dust on to speed the drying time to a matter of seconds) and sand it level with 500 grit wrapped around a file and finished off with 1200 grit and polished (by hand ragging or machine buffing) to match the rest of the joint with tripoli (don't use jeweller's rouge on grenadilla!).
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
Post Edited (2011-12-19 22:51)
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Author: stebinus2
Date: 2011-12-24 22:22
I once got a nice outcome on a very long crack on an upper key joint after scraping out a groove and applying the super glue with grenadilla dust. That was the hardest part as I had to work fast, one small section at a time with the glue drying almost immediately. After that it was a real mess but after filing and various grades of sanding down to an emery paper it came out very smooth and contiguous but grayish in color. I then "painted" it with a black sharpie pen, let it dry and then polished with a cloth. I think I may have repeated the sharpie applications once or twice. It came out a very good match, barely perceptible. That was several years ago and it still looks just as good. Be careful with that glue though. You don't want it on your fingers. I think there's some slow drying super glue that I would try if I was doing it again.
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