[pianotech] back rail cloth, (was of replacing keytops)

[David Love]

I prefer to leave the back edge unglued.  I'm not even sure that the key
level wouldn't be just slightly more stable that way.  If the cloth expands
and it's glued at both edges then it will be more prone to "crowning" a bit.
Unglued at the back is definitely quieter, I find.

 

David Love

www.davidlovepianos.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ed Foote
Sent: Sunday, December 13, 2009 8:40 AM
To: pianotech at ptg.org
Subject: [pianotech] back rail cloth, (was of replacing keytops)

 

Dale writes: 

  >>BTW All vintage Steinway had the back rail glued on both sides. We still
put it back that way.  There is always an underlayment of  red felt &
sometimes a shim of the  red colored oil board that Steinway has used
forever. The back of the key always stops precisely with out bounce and the
hammer line doesn't wander

 
  I am not sure about the "all" part of this.   My experience with many
Steinways from before 1920 is that the back rail cloth is usually not glued
at the back. I am speaking of untouched pianos.  I haven't noticed any less
stability with it done this way, and, it seems to lessen the noise. 
Regards, 
Ed Foote RPT

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