Brass Rail Tension

[Farrell]

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Mike, I do the same thing. I will also do it that way sometimes on a =
wooden flange before I push the pin through the flange (usually at the =
beginning of the process when I am calibrating reaming, etc.). FWIW =
though, one thing I have noticed is that to get the four or five swings =
(or whatever your target is) with the flange in place, you will =
typically need to see only two or three swings without the flange but =
just holding the pin. Hard to imagine exactly why this discrepancy =
exists. Perhaps there is a bit of friction between the side of the =
wooden flange and the side of the butt/shank. So somehow, you might want =
to incorporate a potential friction discrepancy between the two methods =
- who knows, maybe it is only on a wooden flange and it won't occur on a =
brass rail.

Another way around this is to convert the brass rail to wooden flanges.  =
;-)

Terry Farrell

----- Original Message -----=20
From: "Michael Spalding" <spalding48@earthlink.net>
To: "joey@onkeypianotuning.com, Pianotech" <pianotech@ptg.org>
Sent: Monday, October 13, 2003 7:45 PM
Subject: RE: Brass Rail Tension


> Joey,
>=20
> While fitting the pin, (i.e. before the pin has been clipped to =
length) you
> can slip the pin into one or both sides of the bushed butt and, =
holding the
> protruding end of the pin, swing the hammer.  One bushing at a time =
lets
> you equalise the fit between the two sides.  No way I know of to put a =
gram
> scale on it, but you quickly get a feel for the right amount of =
friction.
>=20
> Mike
>=20
>=20
> > [Original Message]
> > From: Joey Recker <joey@onkeypianotuning.com>
> > To: Pianotech <pianotech@ptg.org>
> > Date: 10/13/2003 6:15:57 PM
> > Subject: Brass Rail Tension
> >
> > How do I check the tension for center pins in a brass rail?
> >
> > I'm working on a 1907 M. Schulz upright.  It has a brass rail.  Most =
of
> > the hammers are sluggish.  No sign of vertigris etc... =20
> >
> > I've started re-pinning the hammer butts (had to rebush a few that =
have
> > come apart during the process). I'm familiar with checking the =
tension
> > on items with wood flanges.  But on the brass rail I'm having to =
install
> > the hammer, check the tension, re-pin, re-bush, ream or burnish,
> > re-install, try again, etc...   After many tries, many of them just
> > don't seem to be getting any better.  Any tricks of the trade?
> >
> > I'm having a hard time with this one.  (But, like daddy said,  "If =
it
> > was easy, everyone would do it!").
> >
> > Any suggestions?
> >
> > Joey Recker =20
> >
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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