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Corks coming loose

Author: kdk ★2017
Date: 2017-08-20 00:23

I have been having a problem with tenon corks coming loose over the past months. I've just had to replace the middle tenon cork on my clarinet for, I think, the third time (so, 4 corks) inside of a year or year-and-a -half. They are not too snug, I don't leave the instrument out overnight, and I play it every day - it's my main Bb.

I'm mounting them with standard Weldwood Contact Cement, applying it to both surfaces, letting it dry to a dull surface, then pressing the cork onto the tenon. They seem firm and hold snugly for a period of a few months, then come loose and roll up the tenon one day when I assemble the clarinet. The first time it happened, it was a cork that my very trusted repairman had put on. I started doing my own to avoid the trip to his shop. I have had the same thing happen relatively recently to a barrel tenon cork - it seemed perfectly intact and fit well and one day just came off. The corks are not worn-looking or damaged when this happens.

This is a new experience after 60 years of playing. What possibilities might explain it?

Karl

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Corks coming loose new

kdk

2017-08-20 00:23