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Re: What is swedging?

Author: Ray
Date: 2003-11-11 20:05

There is a soldering, not welding term, that you may be thinking of. It is "sweating", short for sweat-soldering. Its sometimes used on copper pipes.

Swedging is, as Mr. Botch says, a way to make keys fit better. Common applications on clarinet are the E/B lever and the F/C lever. You know when you can wiggle the end of the lever from side to side? The tube part of the lever no longer fits snugly onto the rod on which it pivots.

A repair technician can remove the lever and rod, and with special swedging pliers or a more elegant swedging tool, squeeze the tube down so it fits the rod better. This has the effect of lengthening the tube a bit. Usually this is desirable, since the tube ends have probably worn also.

This is part of a good overhaul, to produce solid and quiet key action.

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