Roller Size, again

[Jon Page]

At 06:03 PM 09/05/2000 -0400, you wrote:
><snip>
>I'll experiment with the different heights tomorrow to ascertain any 
>friction or Strike Weight
>Ratio discrepancies. Some difference must be produced if the two extremes 
>were place
>adjacent to each other, .030 in height is quite a bit.
>
>The closer you look, the more there is,
>
>Jon Page,   piano technician
>Harwich Port, Cape Cod, Mass.
>mailto:jonpage@mediaone.net
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

As promised, I tested two different knuckle heights from the same set 
measuring .662 and .628.

                 .628            .662
UW              17              17
DW              43              41
F               13              12
BW              30              29
SWR             6.4             6.5
Diam.           .277            .289

Center pin friction was nearly the same with the smaller knuckled shank 
having two more short swings.

Interesting findings, I'll have to ponder them as start tuning for the new 
semester starting in a few weeks.

Regards,
Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@mediaone.net
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~