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REPLACING CORKS

 

Dear Steve:
Some of the cork has come off the lower stack keys of my tenor, and the noise is terrible and the key heights are uneven. How do I replace them?

Angie Guenairi
Columbus, Ga


Angie:

This is something you MUST take care of right away! If you don't, the impact of the key feet on the body tube of your horn will cause dents and will distort the key feet themselves. The fix is pretty easy, and you should be able to do it yourself in a short time.

You will need:

bulletCork pieces of the same thickness as is on both the top AND bottom of the key foot (they're probably different! Measure carefully!)
bullet320 grit sandpaper or emery cloth
bulletCA glue (commonly known as super glue)
bulletSingle edge razor blades

Take the keys off your horn, and carefully measure the thickness of the cork on both the bottom of the key foot and on the point where the key foot contacts the adjusting bar which operates the F# key.

Select cork that is the same approximate thickness.

Remove the old cork from the keys. If you're going to do one, you might as well do them all, because if you don't, you'll never get the action to feel consistent.

Select the proper thickness of cork and cut some pieces that are about the same sizes that you'll need. Now, before you install them (THIS IS CRITICAL), compress the corks themselves with a pair of pliers. If you don't, the cork will break in as you play the horn and require more adjusting over time.

Glue the new corks into place with the CA. Be careful not to glue your fingers together. Trim the corks to a perfect fit with the razor blade. Neatness counts! Put the keys back on the horn, and reattach the springs. Don't forget to wipe off and re-lubricate the rods before you put them back in the keys. This is the best chance you'll ever get to clean off the body tube, so do that with a soft cloth. Put a drop of oil on each and every spring, and a dab of cork grease on the point where the spring contacts the key. This really helps quiet the action.

When the stack is reassembled, take your leak light and see if the F, E, and D keys all close the F# pad. They don't, do they? What a surprise! Cut the 320 paper into a strip about as wide and as long as the index finger of your right hand. Now take a good look at the sandpaper. It's smooth on one side and abrasive on the other. Put the sandpaper strip. WITH THE ABRAISIVE SIDE TOWARD THE CORK, between the adjusting rod and the top of the F key. Close the key and pull the strip out with a slow, even movement. Check the F# pad for leaks. Getting better? Do it again. Better still? Keep going until you have the F# closing perfectly in conjunction with the F. Repeat this process on the E and D keys.

Now that the leaks are out, you'll notice that the keys may have a little excess play in them. Did you sleep through high school geometry? I did. I remember they said something about a straight line that was tangent to a circle or something like that. Well, that's what you've got here. The cork must be shaped to perfectly fit the body of the horn AND must be the proper height so that all of the keys contact the F# adjusting bar evenly, with NO EXCESS PLAY. You'll probably notice that one of the keys fits tightly against the bar, while the other two move a little before contact is made. This is not a good situation. That means that the foot of the key that touches is a little taller than the other two. You must now, using the sandpaper WITH THE ABRASIVE SIDE TOWARD THE CORK, NOT THE HORN BODY, adjust the corks until they are all of a height that allows each key to be in contact with the adjusting bar with absolutely no excess play. Make sure that all of your corks contact the body evenly and are contoured to the shape of the tube.

All of this being done, you will find your horn to be much quieter and have a more precise feel. BTW, for the record, I don't use cork in my overhauls. I use another material that is much more difficult to work with, and I don't suggest that you try it at home, nor am I going to tell you what it is!

Good luck, and email me with your questions! Practice long tones every day!

 

STEVE GOODSON
New Orleans
www.saxgourmet.com
(504) 895-6859 M-Th 10 - 3; Fr 10 - noon

 

Steve endorses and uses UNISON saxophones;
RUNYON mouthpieces; MASTERPIECE
necks; HORN DOCTOR key clamps;
MUSICMEDIC repair kits; and ED MYERS
repair tools.

 

 

 

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