[pianotech] 1098 Hammer Bore

[Ron Nossaman]

On 2/15/2013 11:12 AM, Jurgen Goering wrote:
> I sent this yesterday, but it is not showing up.  I will re-send at the
> risk of having both posts appear... I apologize if they do.
>
>
> On any upright, the bore is never calculated as below. Otherwise, as has
> been alluded, the hammer shank would be vertical when the hammer meets
> the string. A ballpark hammer bore determination for an upright would
> be: String to center pin distance less blow distance plus 5.5 mm (7/32").

Or, reproduce the rake angle in deviation from parallel of the shank to 
the strings (with the hammer perpendicular to the string) and measure 
the resulting bore distance.

Ron N