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Klarinet Archive - Posting 000147.txt from 2010/12

From: bhausmann1@-----.net
Subj: Re: [kl] barrel question
Date: Wed, 22 Dec 2010 09:56:19 -0500

The trouble with gluing is that it can give a false sense that the ring is =
tight even though the wood may have shrunk away from the ring most of the w=
ay around. If shrunk properly the ring will still be round, and will have =
some flex anyway, so that should not be a problem. Shims are only literall=
y paper-thin and will also cause no significant stress on the wood.

However, I fully support using glue (I prefer super glue) for rings on PLAS=
TIC clarinets, since expansion and shrinkage of the material is a non-issue=
. They should still fit tightly, of course.
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Nitai Levi <clarnibass@-----.com>
Date: Wed, 22 Dec 2010 03:04:29 =

To: <klarinet@-----.com>
Reply-To: The Klarinet Mailing List <klarinet@-----.com>
Subject: Re: [kl] barrel question

>>YES!=A0 The ring reinforces the barrel to keep the thin, weak sockets =

>> from breaking.=A0 Get thee to a repair tech.=A0 He will either shrink th=
e =

>> ring to fit, or, less good, shim it to be tight.=A0 DO NOT try to glue i=
t!

I disagree. This is after seeing metal ring glued with many different glues=
, =

gluing them myself and seeing and trying the other methods of shimming (wit=
h =

many different materials) and shrinking.

The problem I have with shrinking is you can't know the metal ring fits the=
wood =

(or other material) exactly, the wood is definitely 100% round anyway and t=
he =

ring is most likely not also. So it seems tight, but=A0there's a good chanc=
e the =

ring doesn't support the wood equally all around, or even that it presses t=
oo =

much in some area while not enough in others. Another disadvantage is, if f=
or =

whatever reason (e.g. weather) the ring has to be fitted again, it's =

significantly more difficult.

The same problem with shimming, whether done with paper, leather, plastic b=
ag or =

any=A0other material I've heard of.=A0In some way it's worse, you have no c=
ontrol =

over the thickness so you use=A0whatever it is.=A0The chance of the shimmin=
g =

material being the exact correct thickness is=A0next to nothing. Having the=
shim =

not all around again creates the problem of the ring pressing against some =
areas =

more than others, possibly even distorting=A0it.

So I actually think gluing =A0the ring is the best option, but the type of =
glue =

makes a huge difference. I prefer shellac. It dries very hard and has no pr=
oblem =

supporting the ring. It doesn't crush when it is compressed this way from t=
he =

ring shirnking. Super glue which I've seen used is not good, it doesn't fil=
l a =

gap so well and I've seen rings fall. Epoxy is pretty hard and can be good =
but =

has a bit more give, I prefer=A0more support of shellac. For years now I've=
never =

had a ring glued with shellac fall. The other main=A0advantage is, it exact=
ly =

fills the gap, the exact correct amount around the entire circumference. So =

there is no area supporting more than another and no area with too much fil=
ler =

or not enough. It is also much easier to refit the ring again if for whatev=
er =

reason it is needed. Of course it is important to make sure the entire gap =
is =

filled with shellac, which is not difficult.

>> There;s no one capable of doing a repair like that =

>> within an hour (at least) so I'd have to pay for shipping

Even in my tiny country it is pretty common to drive around an hour to a =

repairer. It is strange to ship this distance. Something like this most lik=
ely =

can be fixed on the spot, so just try to see if you can schedule with whoev=
er is =

going to do it that they do it while you wait (so you don't have to come ba=
ck =

again). That's what I recommend anyway.

=

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