New piano pin torsion

[Marcel Carey]

At 10:08 97-05-14 -0400, you wrote:
Dear Rick,

I was wondering about that fact myself until I checked the diameter of
certain pins on Asian pianos. They often use #1 tuning pins. I'm presently
working on a 14 years old Yamaha and the original pins are .272". I think
yound Chang use these small pins too. That probably makes them more prone to
twisting especially when the torque is high. I don't know the physic
formula, but there must be quite a difference in twisting between a #1 and
#2 tuning pin.

Hope this helps,

Marcel Carey, RPT
Sherbrooke, QC

>1. Are there different hardnesses of tuning pins out there, wherein some
>will twist and some won't?
>2. Does anyone know a difference in pinblock material to explain the
>difference in the Schimmel (perhaps the same *dynamic* torque-feel, but a
>lesser *static* grip on the pin) and the other brands?
>3. Do these 'tight and twisty' type pianos generally loosen up after a
>couple tunings?
>4. Are there any new generally accessible avenues of  online communication
>between independent tuner-techs and company tech departments (or the Piano
>Manufacturers Associations) where tech info and field reports are
>exchanged?
>
>Thanks in advance, All, for your ideas. And it's good to be back.
>
>Rick Clark
>
>