[CAUT] Shimming the Steinway Action stack to reach the strings

[James N. Hess]

Often you are very limited on the amount you can raise the stack because
of interference with the pinblock. My experience has been that you may be
able to add 1/16". I think reboring the hammers is a better solution.

Jim Hess, RPT

On Fri, 26 Feb 2010 14:58:36 -0500 "Chris Solliday" <csolliday at rcn.com>
writes:
String Height minus Hammer Bore equals Shank Center Pin Height. We use
laminated shim stock that we get from the local hobby store. Realize that
just raising the pin height MIGHT work, but consider the arc of the
hammer blow. You could end up with the hammer over centering if you
simply raise the feet under the hammer flange pins. You need to imagine
the pin in space and rotate the stack around it so that the stike point
ends up at ninety degrees to the string. It might not be that now.
Usually this means shimming the front foot slightly as well. Best of luck
Andrew.
Chris Solliday, RPT

----- Original Message ----- 
From: Andrew Anderson 
To: caut at ptg.org 
Sent: Friday, February 26, 2010 12:45 PM
Subject: Re: [CAUT] Shimming the Steinway Action stack to reach the
strings


Yes, mea culpa.  Wasn't really thinking the numbers...most likely 2"+ 


On Feb 26, 2010, at 11:30 AM, reggaepass at aol.com wrote:




The school whose Steinways I service is not satisfied with the dealer's
warranty fix (greater then 1" blow distance).
Andrew, 


Not sure what you mean by this ("greater then 1" blow distance").  Did
you mean greater than 2" (since it sounds like the strings are too high)?


Alan Eder





-----Original Message-----
From: Andrew Anderson <andrew at andersonmusic.com>
To: College and University Technicians <caut at ptg.org>
Sent: Fri, Feb 26, 2010 9:13 am
Subject: [CAUT] Shimming the Steinway Action stack to reach the strings


The school whose Steinways I service is not satisfied with the dealer's
warranty fix (greater then 1" blow distance). They are requesting that
the piano be made to play like it should which will require shimming the
stack so it is within reach of the strings (>1/4" between fully backed
out drop-screws and pinblock). 
 
Has anyone done this? What was the scope of work required? What is a
reasonable amount of time to complete the work? 
 
Thanks 
Andrew Anderson 





James Hess, RPT    
200 W. Allen St.  
Mechanicsburg, PA 17055
717/580-1445 (cell)  
www.hesspiano.com
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