Balance rail felt

[Piano Forte Supply]

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I  have never understood the use of thick (up to 1/8") balance rail 
puncings in North American pianos. The thicker the punching, I believe, 
the more problems you have with  unstable regulation - key level, key 
dip, blow distance (on grands) etc.  Not to mention the loss of power as 
the punching compresses under the force of a note being played ff or fff.

European pianos almost always have thin balance rail punchings.   The 
preferred punchings are made out of 1.1 mm (.044") bushing cloth.  See 
my web site: 

http://www.pianofortesupply.com/felt2.html 

In cases where these are not thick enough, thick paper punchings are 
used to bring the key up to the proper height.
A good rule to follow when levelling keys is to use no more than four 
paper punchings, with no more than two of the same thickness.

Jurgen Goering
Piano Forte Supply

>
> Subject:
> Balance rail felt
> From:
> V T <pianovt@yahoo.com>
> Date:
> Thu, 2 Sep 2004 15:49:39 -0700 (PDT)
> To:
> pianotech@ptg.org
>
>
>Hello List,
>
>If anyone has done a survey of balance rail felt
>punchings, could you please let me know who is selling
>the thinnest, hardest ones (as little compression as
>possible).  Thanks!
>
>Vladan
>
>
>  
>

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