[CAUT] Steinway hammer spec.

[Alan McCoy]

Hi David,

Maybe it's moot now but here's some questions for you. You're right about
the 5.125" hammer line. What about other action parameters and geometry
issues in this piano? It's certainly possible that the action stack (height
and/or fore to aft) is not located properly. How's the convergence at the
capstan/wip cushion? Key ratio? Action friction? Key dip/hammer blow? How
many leads in the keys?

Attached is a copy of Michael Mohr¹s forefinishing notes, an interesting
read that might be of use for this action.

Alan

-- Alan McCoy, RPT
Eastern Washington University
amccoy at mail.ewu.edu
509-359-4627


> From: "Porritt, David" <dporritt at mail.smu.edu>
> Reply-To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org>
> Date: Tue, 06 Jun 2006 14:43:02 -0500
> To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org>
> Conversation: Steinway hammer spec.
> Subject: [CAUT] Steinway hammer spec.
> 
> I know that Steinway glues their hammers to the shanks at 5-1/8".  Where
> is that measured???  I had always thought it was from the center pin to
> the mid-line of the hammer.  I'm putting on new hammers on a D and the
> treble hammers are 5" from center pin to mid-line, and it tapers to even
> shorter at the bass end.
> 
>  
> 
> I'm going to leave the treble hammers at 5" or I'll run into action
> placement problems, however the tails of the bass hammers are pretty
> close to the wippen (OK repetition!) and I'd like to move them out to be
> the same as the treble hammers.  Can anyone see a problem waiting to
> happen here?  In the morning (when the key bushing glue is dry) I'm
> going to dry fit samples to try them but I thought I'd check with the
> combined wisdom of the list.
> 
>  
> 
> Thanks! 
> 
>  
> 
> dave
> 
>  
> 
> __________________________
> 
> David M. Porritt, RPT
> 
> Meadows School of the Arts
> 
> Southern Methodist University
> 
> Dallas, TX 75275
> 
> dporritt at smu.edu <mailto:dporritt at smu.edu>
> 
>  
> 

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