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Re: Buffet variability/bending keys

Author: clarnibass
Date: 2013-02-05 05:05

When you say "almost no clearance" I assume you mean it is not venting enoug hwhen open, yes?

First make sure there isn't a too-thick bumper that causes the problem.

If that is not the problem and the key doesn't open enough, it is most likely that it was bent at some point and not made this way. There are several possibilities.

The Ab/Eb touchpiece usually has a little stop under it. Although it's much more likely that this stop bends down and causes the key to open too much, the opposite is also possible. Check if this is the reason.

If not, probably best to bend the key (back to) open the correct amount. I would definitely prefer to do that while the key is on the instrument(!) unless it is not possible.

Make sure there is no crack at the solder joint of the hinge and key arms. This doesn't happen often, but can be a reason for it bending out of alignment and might break if you bend it back.

For this key I would usually start with my fingers by bending the key cup side of the key up (while it is on the instrument). Notice that the touchpiece is leaning against the stop, so it all depends on the weakest part of the key, that is where it would bend. It is usually better than forcing it to bend in a different place. Try to hold the key cup in such a way to not distort its alignment over the tone hole. You can try to support the touchpiece side of the key if you suspect it will bend the stop too much (unlikely but possible).

Next step would probably be using very strong pliers with big and flat jaws on the touchpiece only, having the key cup and pad support against it from the other side. It should not damage the pad.

Only in more difficult cases where the key won't bend on the instrument I would remove it. Then, make sure to bend to the rod screw inside the key!

Since it's a Buffet it's very unlikely that the keys are "pot metal" (aka mazak, etc.).

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