 The Clarinet BBoard
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Author: Reformed
Date: 2020-02-01 14:40
I have 2 barrels that I would like to use frequently on my reform Boehms.
The first fits perfectly, i.e. no rocking or movement and fits without brute force. Its inner tenon diameter is 23.70mm.
The second is P&S zoom barrel is 23.92mm. This is quite loose.
So, I need a shim or sleeve that is 0.1mm.
I know that common approach is to wrap a couple of cigarette papers or, more permanently, a few wraps of plumber's ptfe tape around the top joint tenon. But I would really like something that can be changed on the fly, quickly. So I would like to fit a semi-permanent sleeve in the Zoom barrel tenon.
I believe a coke can is about 0.1mm!
Any suggestions?
Post Edited (2020-02-01 14:40)
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Author: igalkov
Date: 2020-02-01 15:39
Hi reformed,
I’ve had a plastic bottle insert glued with epoxy in the barrel. It was awful experience, I ended up throwing this insert away and reamed the barrel with a smaller tenon.
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Author: Ed
Date: 2020-02-01 17:58
I have seen some people do a very thin lining of cork inside the socket. You could probably talk to a good tech and have the barrel socket lined with a thin sleeve.
Post Edited (2020-02-02 21:59)
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Author: Steven Ocone
Date: 2020-02-01 23:10
JL Smith has some very thin copper with an adhesive backing that might work.
Steve Ocone
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Author: m1964
Date: 2020-02-02 00:48
Maybe it would be easier to get another P&S barrel with smaller socket, if they make the them in the size you need.
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Author: Chris P
Date: 2020-02-02 01:12
Remove the tenon cork, degrease the tenon thoroughly and maybe lightly roughen up with abrasive or a scraper (and degrease again), coat the tenon rings with a few thin layers of superglue letting each layer harden before applying the next, then machine them to fit the socket just as a flute headjoint fits its socket with no binding nor wobbling. Then fit a new tenon cork.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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Author: clarnibass
Date: 2020-02-02 08:57
>> then machine them to fit the socket just as a flute headjoint fits its socket with no binding nor wobbling. <<
But he wants to also use another barrel with a 0.2mm smaller diameter socket.
Reformed, are you asking about something you can do yourself? I would fit a sleeve to the barrel socket but not sure you can do that yourself. Depends on your tools and experience.
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Author: Chris P
Date: 2020-02-02 09:35
If that's the case and you want a permanent fix, have the socket reamed out slightly larger and deeper if need be (depending if it's deeper than the length of the tenon), then sleeved with either a plastic or nickel silver liner.
If it's a ringless barrel, have a carbon fibre band fitted near the end (Buffet Elite-style, only hidden with filler) to give the wood strength as metal socket liners can crack sockets when the wood shrinks.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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Author: Grabnerwg
Date: 2020-02-02 18:46
Let's back up a step or two. Why are you needing to change barrels on the fly?
Walter Grabner
www.clarinetxpress.com/bell.html
New 3D printed Bell
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Author: Reformed
Date: 2020-02-03 13:23
Maybe best to define my use of "on the fly"!
It's probably say easier what is is not - it is not changing barrels within a piece during a performance.
But it is deciding to change barrels between pieces in a performance or when changing between A and Bb.
At the moment I am trying to decide between 2 mouthpieces, one of which plays sharper than the other.
Also performing temperature does vary a lot so being able to swap barrels securely would definitely be good.
I like Steven Ocone's suggestion as I have some of the JL Smith flute head joint fitting strips for another project. Will definitely give that a go.
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Author: John Peacock
Date: 2020-02-03 16:47
Like many things, there have been past discussions on this - worth searching for.
My answer to your question would be to press you on how loose the barrel really is. You quote a 0.1mm shim, but that's clearly a very round number. Is it just slightly loose - which I would define as saying that the barrel won't fall off if you hold the instrument upside down, but it moves easily enough that it would rock when you play? If that's the case, it's easily fixed: degrease the socket and smear a thin layer of superglue around the inside. I've done this with complete success for a few old worn barrels to bring them back to modern standards of tightness.
If there's really too big a gap for this to work, then you can superglue a thin piece of plastic inside the tenon. Igalkov commented above about negative experience doing this (using epoxy). All I can say is I tried it once and was very happy with the result. I used a piece of super-thin plastic from the trays you get with plants in garden centres.
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