Grand hammer tail shape.

[Greg Newell]

Jon,
    RE: JPG's available .... please send. You're just a wealth of info aren't'
you?
Greg

Jon Page wrote:

> 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
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~