Yamaha hammers

[David Love]

That would be hammers cut from a quarry, as in rock!

David Love
davidlovepianos@earthlink.net


> [Original Message]
> From: Avery Todd <avery@ev1.net>
> To: <davidlovepianos@earthlink.net>; Pianotech <pianotech@ptg.org>
> Date: 11/6/2003 5:11:46 PM
> Subject: Re: Yamaha hammers
>
> David,
>
> What are "quarried" hammers? Just curious.
>
> Avery
>
> At 07:01 AM 11/6/03 -0800, you wrote:
> >I've scheduled a major voicing of a Yamaha C7 with quarried hammers for
> >next week and finally broke down a bought myself a cordless Dremel
> >(actually Craftsman $29.99) for the job.  You need to buy a 1/32" collett
> >to hold the needle.  An extra battery doesn't hurt either.
> >
> >David Love
> >davidlovepianos@earthlink.net
> >
> >
> > > [Original Message]
> > > From: <A440A@aol.com>
> > > To: <pianotech@ptg.org>
> > > Date: 11/6/2003 6:02:29 AM
> > > Subject: Re: Yamaha hammers
> > >
> > > I wrote about needling hard hammers:
> > > >   . . . with a single #6 needle that is almost long enough to reach
the
> > > core wood.
> > >
> > > David asks:
> > > > What kind of needle do you use and how do you keep them from
breaking?
> > > Every time I try a length longer than about 5/16", they break on me.
> > >
> > >    I have found that you can't get the needle in, all the way, at
first.
> >So,
> > >  I begin softening the shoulder with shallower jabs, gradually getting
> >full
> > > penetration after maybe 15 or so progressively deeper needles.  I
suppose
> >I
> > > voice by tactile feel, first.  By now, I know what a nicely voiced
hammer
> >feels
> > > like on the shoulders, and prep them accordingly.  (note, this is NOT
a
> > > technique for Steinway hammers that are loaded with lacquer).
> > >
> > > >   The hammers are so hard that if you begin at the upper shoulder,
the
> > > > tension in them will tear them apart after a while.
> > > > Regards,
> > > > Ed Foote RPT
> > >
> > >
> > > >>Is that indeed what's happening in a hammer with lots of tension --
> >like
> > > bending a rope sharply, then hacking at the top of the bend with a
knife,
> > > gradually cutting the fibers and making it pull apart?  >>
> > >
> > > That seems to be an appropriate analogy.  With sufficiently soft
> >shoulders,
> > > graduated to real hardness under the strike point, the hammers hold
> >together
> > > quite well and respond very sensitively to needles going in near the
> >strike
> > > point.
> > > Regards,
> > > Ed Foote RPT
> > > http://www.uk-piano.org/edfoote/index.html
> > > www.uk-piano.org/edfoote/well_tempered_piano.html
> > >  <A
> >HREF="http://artists.mp3s.com/artists/399/six_degrees_of_tonality.html">
> > > MP3.com: Six Degrees of Tonality</A>
> > > _______________________________________________
> > > pianotech list info: https://www.moypiano.com/resources/#archives
> >
> >
> >
> >_______________________________________________
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>