S&S action question

[Alan Barnard]

Howdy. Since action "weight" has three components (linkage physics, mass,
and friction), I'd sure want to know what could be accomplished with the
cheaper two first.

I'd measure the DW-UW and see what kind of friction you've got. Are there
treatable friction sources? Action centers in spec, etc?

Were hammer heads and shanks shaved any on install? How about coving the
heads? After all, 2/10s of an ounce at the hammer is worth an ounce under
the player's finger.

Were the originals 15mm shanks or 17mm? How is the jack to knuckle fit,
i.e., does the regulated knuckle end up in a "normal" position in the
window or is it a bad fit for the shanks, maybe causing an ineffecient
energy coupling?

Keep us informed how this comes up, we all have 18-wheelers in our
inventory ... but selling regulation is always a challenge.

Alan Barnard
Salem, Missouri


> [Original Message]
> From: Phil Bondi <phil@philbondi.com>
> To: Newtonville <pianotech@ptg.org>
> Date: 07/25/2005 3:19:47 PM
> Subject: S&S action question
>
> I have been asked to get this action to feel lighter. Right now it feels 
> like a Mack Truck. I have not measured DW yet, but it feels like mid 
> 60's to me.
>
> -there is only 15mil from knuckle to bushing. I measured it 3 different 
> times getting the same result.
>
> -Hammers, shanks, knuckles, and whippens have all been replaced, but I 
> think I'm fighting an uphill battle without replacing those shanks.
>
> Your thoughts?
>
> -Phil Bondi(Fl)
>
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