Poor key mortising

[Piano Forte Supply]

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Surprisingly many pianos have balance pin mortises that are too shallow, 
causing the key to bind on the balance pin when the key is depressed.    
I have seen this problem on several older (1920s) Steinways, so this 
problem is not limited to cheap instruments.  There is a European tool 
made specifically for alleviating this problem.

You can see the Balance Hole Reamer at:
http://www.pianofortesupply.com/tools1.html

Jurgen Goering
Piano Forte Supply

>
> ------------------------------------------------------------------------
>
> Subject:
> Poor key mortising
> From:
> "Mike Bratcher" <MBratPianos@indy.rr.com>
> Date:
> Wed, 8 Sep 2004 07:47:16 -0500
> To:
> "Pianotech" <pianotech@ptg.org>
>
>
> Hey folks,
>
> I wondering if anyone had good ideas or ways of dealing with keys that 
> have a lot of wood around the balance rail pin.  The wood is not 
> allowing the key to move freely.  Actually it is trying to bend the 
> pin, as I can see the pin moving when played.  The keys already have 
> new bushings.  This all makes for VERY poor touch.
>
> Any thoughts?
>
> Mike Bratcher


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