[CAUT] Shank to Hammer weight spreadsheet

[Tim Coates]

Keith,

Listening and sequencing the shanks is very fast if done correctly.   
I don't agree with Grotian's sequencing method.  I've been sorting  
low pitches to the bass end and high pitches to the top for over  
twenty years.  One basic principle I follow is a low pitched knock  
associated with a movement within the piano reduces power.  It is one  
of the main reasons I change front rail felt punchings.  Hard felt  
punchings create a low knock that robs power from the sound.   I find  
the same to be true with the pitch of the shanks.

But as I have said before:  to each his own.  Grotian does it their  
way and that's fine.  I know what works for me.

Tim Coates


On Feb 16, 2008, at 8:07 PM, Keith Roberts wrote:

> My question is, if you are weighing the whole shank and flange, how  
> do you know the distribution of the difference in weight? If 90% of  
> the weight difference is from the knuckle through the flange, the  
> SW wouldn't change much and so the presumed evening out of the  
> weights is not there. The distribution of the mass could vary from  
> shank to shank at all the different weights.
>
> I like the idea of listening to the sound of the shanks. A thinner  
> light shank should produce a higher sound. Very quick too.
>
> Keith Roberts
>
> On Feb 16, 2008 5:48 PM, Jon Page <jonpage at comcast.net> wrote:
>>   It takes too long.  Just dry fit the hammers to the shanks
>> right after you've tapered them with the table saw ...
>
> I don't think you get the idea. Mating a shank's SW with a
> hammer weight will require less hammer mass alteration
> to achieve a smooth SW curve.
> -- 
>
> Regards,
>
> Jon Page
>

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