Pulley Keys

[Sarah Fox]

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Hi Terry, David,

There's an article about the technique on the Onesti Piano web site:

http://www.onestipiano.com/pages/journalarticle.html

This seems to be a relevant section:

<<If there are keys with massive damage so that a gauge pin will not =
center in the hole, the key can be placed in the keyframe with neighbors =
to align properly while sitting on a snug fitting paper punching of =
.015" or greater glued onto the bottom of that key. This will provide an =
adequate guide for the pin and cutter. Selecting the proper drill bit =
for the size of the balance pins, insert it into the plug cutter, =
centering properly.>>

The following technique might be used to *establish* the correct =
alignment for the "snug fitting paper punching":

(1) Put a snugly fitting paper punching over the balance rail pin.
(2) Put a tiny dab of glue on the punching.
(3) Carefully lower the key onto the punching, making sure to position =
it correctly with respect to its neighbors.
(4) Leave key until glue is dry.
(5) Remove key and mark/measure the position of the punching hole =
(perhaps by making a mark exactly X-distance "aft" of the correct =
position).
(6) Cut the notch, glue in new material, etc., etc. -- placing the =
balance rail pin hole at the previously measured location.

Or here's another idea:

(1) Cut a notch in the key. =20
(2) Cut an insert to go in the notch, leaving just a tiny bit of room =
for fore/aft "wiggle," and leaving just a tiny bit of excess width (not =
so much as to touch neighboring key).
(3) Drill a balance rail pin hole in the insert in the "best guess" =
location.
(4) Dry-assemble the insert and notched key on the keyframe and check =
for alignment.  Needs tweaking? Remove material from appropriate end of =
insert to achieve correct alignment.  The point is that it should be =
*possible* to align the keystick over the insert, when sliding it =
around.
(5) Remove keystick.  Leave insert on balance rail pin.
(6) Put Titebond on both surfaces.  Lower keystick onto insert.  Align =
correctly with neighbors.  Let dry.  Perhaps epoxy would be a better, =
albeit messier, glue for this step, since clamping the joint (e.g. with =
weight) while maintaining alignment might be problematic.
(7) Remove keystick/insert.  Shape the insert flush with the key. =20
(8) Fill any fore/aft gaps with epoxy (using tape on the sides to retain =
it).

Would that work?

Peace,
Sarah





----- Original Message -----=20
From: "David Love" <davidlovepianos@earthlink.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, June 12, 2004 8:51 PM
Subject: Re: Pulley Keys


> I don't quite understand it either.  It seems that you must be paying =
for
> the information.  The tricky part, as I see it, is when there is
> substantial fore and aft play and the hole center must be =
reestablished.  I
> can't quite envision an easy method to accomplish that. =20
>=20
> David Love
> davidlovepianos@earthlink.net
>=20
>=20
> > [Original Message]
> > From: Farrell <mfarrel2@tampabay.rr.com>
> > To: Pianotech <pianotech@ptg.org>
> > Date: 6/12/2004 4:09:23 PM
> > Subject: Re: Pulley Keys
> >
> > Looks interesting, but looks more like $40 worth of tooling and I =
guess
> the
> > promise of some information on how to do it? Am I missing something? =
$550?
> >
> > Terry Farrell
> >
> > ----- Original Message -----=20
> > From: "David Love" <davidlovepianos@earthlink.net>
> > To: "Pianotech" <pianotech@ptg.org>
> > Sent: Saturday, June 12, 2004 1:10 PM
> > Subject: Re: Pulley Keys
> >
> >
> > > Check out the website
> > >
> > > www.onestipiano.com/pages/bhrs.html
> > >
> > > David Love
> > > davidlovepianos@earthlink.net
> > >
> > >
> > > ----- Original Message -----=20
> > > From:
> > > To: pianotech@ptg.org
> > > Sent: 6/12/2004 9:23:17 AM
> > > Subject: Re: Pulley Keys
> > >
> > >
> > > In a message dated 6/12/2004 6:19:12 AM Pacific Standard Time,
> > > A440WRMPiano@tm.net writes:
> > > If you are serious about doing a quality, long-term job on this, =
and
> > > anticipate doing more in the future, I would recommend the Onesti =
Key
> > > Balance Rail Hole repair system.  It is top notch.
> > >
> > > William R. Monroe
> > > Madison, WI
> > > Assoc.
> > >          Hi WIlliam
> > >   I've heard of this. How much time to repair a set of holes =
accurately?
> > >           Dale
> > >
> > >
> > > _______________________________________________
> > > pianotech list info: https://www.moypiano.com/resources/#archives
> > >
> >
> >
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
>=20
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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