[CAUT] S&S M Strike point

[John Delacour]

On 22/12/2012 17:20, Bob Hull wrote:

> Does someone know the strike point on string #1 for a Steinway M? 
>  Also, if it has varied over the years, this is for a 1923 model M.
>
> I am building a complete new top action and want to compare that 
> measurement against the current strike line because this piano has had 
> at least one action rebuild in its history.

If your hammerhead is bored at 90° with a bore length equalling the 
difference between the strike height and the hammer centre height then, 
provided your shank length is right, it will contact the string at the 
strike point.  If you are in doubt about the shank length (distance from 
hammer centre to mid-point of hammerhead moulding) then measure this 
length for note 88.  The strike proportion is probably 1/8 at note 1 as 
on the larger models, but if the shank length for note 1 and note 88 are 
the same (probably 130mm) and your hammers are properly bored then you 
can’t go wrong. A few millimetres divergence from some theoretical value 
won’t make a scrap of difference at this point in the scale.

JD