[pianotech] Pulley Keys - was balance hole break-loose noise

Joseph Garrett joegarrett at earthlink.net
Mon Sep 5 12:26:59 MDT 2011


Laura asked:"You know, what about enlarging the hole and cutting a kerf or
2 to insert vaneer front and back. That would give new wood to the surface
area.
 
Thoughts?"
 
Laura,
When the hole is really traumatized, that would be my method of repair.
However, if the hole is just pulley and glue sizing won't take care of it,
I have two other methods: 1. insert gummed travel paper into the hole and
force the pin down on it, to hold it in place, until the glue, (it's
actually hide or fish glue, depending on the type of gummed paper you
have.<G>), until the glue has sets. when the glue has se, trim flush with
bottom of the hole.
2. Determine which way the key needs to go to be flush with it't neighbors.
Break round wood tooth pick in half. Coat the pointed tip with hide glue.
Turn the key upsidedown and lay on a hard surface. Put the point of the
tooth pick approximately 1/16" forward of the pulley hole, (opposite of the
direction it needs to go), and pound it into the key wood. Trim off. In
both cases, check to see if it worked. For the former, you'll sometimes
need more than one strip of travel paper. In the later, you will probably
have to ease it a bit with the Yamaha balance hole tool. (don't use a file!
DAMHIK).
Best Regards,
Joe 


Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I



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