Grand hammer tail shape.

[Jon Page]

Sorry, the arcing part stayed in my head :-)

Tapering is done on a tablesaw. I have two jigs for this.
One for newly bored hammers and one for mounted hammers,
They are pretty much the same except for the offset cam on the new hammer jig.
the shank is used to hold the hammer in place on the 'mounted' jig.

jpg's available.

Jon Page


At 08:32 AM 04/14/2000 -0400, you wrote:
>At 07:42 AM 04/14/2000 -0400, you wrote:
>>Hi one and all,
>>
>>What are the criteria used in determining grand hammer tail taper shape.  Is
>>it factors of clearence with neighboring parts and weight reduction?  As
>>most of you know, the Korean pianos come through with none of this done,
>>just the tail arcing and some very rough ridges for checking purposes that
>>always seem to tear up the backchecks prematurely.
>>
>>Thanks and a good weekend to all.
>>
>>Doug Mahard
>
>
>I like the sweep attained by a 3" arc as measured from the top of the shank.
>Experiment with the radius from three centers: bottom of shank, center and 
>top.
>
>I prefer the top, as it provides nice clearance and seats into the 
>backcheck well.
>However not all moldings are deep enough to center the arc from the top of 
>the shank.
>
>Regards,
>
>Jon Page,   piano technician
>Harwich Port, Cape Cod, Mass.
>mailto:jonpage@mediaone.net
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