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
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