[CAUT] More hammer length needed

[Ari Isaac]

ari isaac
 
hand made bass strings and piano hammers
 
416 229 2096
 
isaac at isaacpiano.com
 
http://www.isaacpiano.com
 
http://www.facebook.com/isaacpiano.com

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Bob
Hull
Sent: February-07-13 2:22 PM
To: caut at ptg.org
Subject: Re: [CAUT] More hammer length needed

Ari, 
I like that idea. It sounds simple and workable. I guess that won't
compromise the firm attachment of the felt to the hammer core.  
Bob 

Sent from my iPhone

On Feb 7, 2013, at 12:48 PM, "Ari Isaac" <isaac at isaacpiano.com> wrote:

> Hi Bob.
> 
> The problem isn't as severe as you might think.
> 
> It's true that the early Steinway hammers were quite short.  What I've
done
> on previous sets for early Steinways, which happened quite often, is to
trim
> back the felt in the low tenor where, as you say, you'd have to drill into
> the felt.  this presents no problem. That's all that's involved.  Also,
your
> measurements aren't as short as others I've had to deal with so I don't
see
> much of a problem.  
> 
> 
> Hope this helps.
> 
> ari isaac
> 
> hand made bass strings and piano hammers
> 
> 416 229 2096
> 
> isaac at isaacpiano.com
> 
> http://www.isaacpiano.com
> 
> http://www.facebook.com/isaacpiano.com
> 
> -----Original Message-----
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Bob
> Hull
> Sent: February-07-13 12:24 PM
> To: caut at ptg.org
> Subject: [CAUT] More hammer length needed
> 
> I am building a new top action with WN&G Parts.  The piano is a 1923
> Steinway M. The needed hammer lengths after calculations is from 42.5 mm
in
> the low tenor to 45 mm in the high treble.
> Bass hammer calculations call  for 50 mm hammer boring in the low bass up
to
> 52 mm at the top of the bass section. Obviously this would have me
drilling
> just about into the felt on the lower ends of the sections.   The old
> hammers are raked I guess to allow more hammer length. I don't want to
rake
> the hammers on the new action.  What do you think about planing down the
key
> frame bottom or rails to remove 2-3 mm of height ? I am installing new key
> pins anyway. Also,  The clearance above the stack to the pin block is
barely
> more than 1/4".  It has been rebuilt at least once already so it's hard to
> know what the original set-up was.  With WN&G rails and parts I can adjust
> things much more easily than with the SS fixed rails/brackets. What do you
> think about this solution of altering the key frame? Somehow I need more
> distance between the hammer action center and the string ht. in order to
> drill lower on the hammer. 
> Bob Hull
> Sent from my iPhone
>