shimmed tuning pins

Tvak@AOL.COM Tvak@AOL.COM
Sat, 16 Feb 2002 22:31:40 EST


1935 Dekalb baby grand piano with about 8 loose pins in the bass area.  

Pinblock cracks?  Well, yes, but an examination of the pin block reveals 
similar cracks throughout the block, and yet only these pins in the bass are 
affected.  The cracks don't emanate from these pins either.

I CA glued them this past summer, and that seemed to do the trick, but at 
that time the piano was in a garage.  Now that it's indoors, and the humidity 
is much lower, the pins are loose again. A second dose of CA helped a few but 
not all.  (One problem with the CA glue is that it seems to well up in a pool 
at the base of the pin, and doesn't seem to go down into the hole where it's 
needed.)

Anyway, I unscrewed the loose pins and inserted a sandpaper shim, 80 grit, 
face outward, drove the pins back in about half way or so, and this worked 
great on all but two of the pins.  On these two, the pins do not seem to 
thread themselves any deeper into the hole.  I turned and turned and they 
just twirl in place.  I hammered them in farther and they do hold the string 
tension (so far, anyway) but they are higher than their neighbors and look 
strange.  

What's the deal with these two?  There are a couple more to do, and I'm 
paranoid that they won't thread their way back in either.  

Any thoughts or advice?

Tom Sivak


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