 The Clarinet BBoard
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Author: Sylvain
Date: 2011-03-26 14:38
Attachment: lower tenon.JPG (97k)
Some of you may remember my clarinet disaster from last year:
http://test.woodwind.org/clarinet/BBoard/read.html?f=1&i=320567&t=320418
Well it looks like my greenline is falling apart after 16 years of service. I discovered a nice crack last week in the lower tenon (picture attached). This time around I did not drop it or did anything more than my usual playing.
Anyone has heard or experienced anything like this? Does the greenline material have an expiration date?
--
Sylvain Bouix <sbouix@gmail.com>
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Author: kilo
Date: 2011-03-26 18:33
The fact that the crack is located directly under the metal tenon cap is suspicious. The regular R13 GreenLines don't have those; or at least they didn't when I bought mine in '06. I wonder how necessary they really are when dealing with GreenLine material, which doesn't have the same sorts of swelling stress that we find with wood. How did you ultimately deal with that mishap in the upper joint? I take it you had it bored and a new tenon installed?
Quoting Sarah Albaz from the previous thread:
Quote:
This is a known problem with the Green Line, and it happend alot with the first modles, like your 95 clarinet (I think that they started to market the Greenline in 94).
I seem to remember someone saying that Buffet has since added longitudinal fibers to the composite material to strengthen the tenons. Perhaps one of the members will know for certain.
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Author: Iceland clarinet
Date: 2011-03-27 01:15
kilo said :
"I wonder how necessary they really are when dealing with GreenLine material, which doesn't have the same sorts of swelling stress that we find with wood."
Well Tom Ridenour once said in his youtube video that the metal tenon caps are a dumb idea for the clarinet as it does not allow the wood the flexibility to swell and expand in each direction making for more stress.
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Author: kilo
Date: 2011-03-27 02:52
Yes, I saw that. But one could at least understand why it might have been attempted, even though any cabinetmaker can tell you that "wood always moves". One can see the rationale for it even if it was mistaken; I just don't understand the reason to use it on composite material, except to mimic a mistaken notion which denotes "quality" to many in the market for a premium product.
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Author: GeorgeL ★2017
Date: 2011-03-27 03:59
According to the Buffet web site, my bought-new R13 Greenline was manufactured in Oct. 1995. It has no metal rings and no cracks (so far, knock on glued powder in lieu of wood). It's model number is given as BC 1131.NI.
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Author: Sylvain
Date: 2011-03-27 05:41
My clarinet is an RC prestige which is why it has metal tenon caps. It was built in 1995.
Here is what I got from the Buffet site:
Brand : Buffet Crampon
Instrument : BC 1113.AG
Serial number : 397271
Year of manufacturing : 10/03/1995
I am not sure what I'm going to do at this point.
--
Sylvain Bouix <sbouix@gmail.com>
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Author: clarnibass
Date: 2011-03-27 06:00
Prestige models have metal tenon caps, regular R13/RC models don't. I agree with kilo that it could be more than a coincidence that it's exactly at the "bottom" of the metal cap. Maybe a result of a knock you never noticed. Maybe something in manufacture made it waiting to happen. A sharp edge there might need just a tiny knock or just time to do this. Not really possible to know, especially not from a photo (BTW why does the cork look so strange with the parallel grrove in it?).
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Author: DougR
Date: 2011-03-28 22:36
Here's a dumb speculation (the kind I hate to read when someone ELSE writes it)...looks like either an impact crack or fatigue in the greenline material from contstant expansion/contraction of the tenon cap over 16 years?
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