Pulley Keys

[David Love]

The problem with changing to thicker balance pins is that the fit at the
key buttons is fine.  So changing pins would only create new problems to
deal with.  Traditional sizing methods with steam and glue I am familiar
with.  I was wondering what various methods people used when shimming with
new wood was required.  I got a couple of answers and referral for
additional information so thanks to all.  

David Love
davidlovepianos@earthlink.net


> [Original Message]
> From: Isaac OLEG <oleg-i@noos.fr>
> To: <dporritt@mail.smu.edu>; Pianotech <pianotech@ptg.org>
> Date: 6/11/2004 7:43:06 PM
> Subject: RE: Pulley Keys
>
> If possible I'll use thicker balance pins, and if not glue size some
> or installing wood washers (2cm diameter, 5 mm thickness)with a tool
> sold in Germany (Jahn) look like the Onesti tool, but use the
> machining cylindrical hole below the balance hole (if exist) to center
> the washer's place.
>
> One of the tricks to stay aligned is to assess correctly the balance
> pin angle, it is rarely 90° to the keys, because the balance rail is
> usually drilled at the same time than the keys, at this moment the key
> plank may be positioned differently from square depending of the
> keyboard.
>
> With a thin key bottom isn't a big problem, but with a thicker one the
> slight angle if not respected when drilling the washer's place, is
> enough to get you off line at the front.
>
> It usually align well enough, if the key is fixed in a vice, but the
> vice itself is not fixed on the drill table so the tool follows its
> path better.
>
> I use a special tool to thin the inside part of the wood washer if the
> wood is too thick in the end.
>
> Hope it is understandable enough !
>
> Isaac OLEG
>
>
> -----Message d'origine-----
> De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
> part de David M. Porritt
> Envoyé : vendredi 11 juin 2004 14:11
> À : davidlovepianos@earthlink.net; pianotech@ptg.org
> Objet : RE: Pulley Keys
>
>
> I am half way through doing this on an "M" here at SMU.  I glue sized
> first in the traditional way and that helped at least half of the
> keys.  However, there are still pully keys so I'm doing the slot,
> veneer thing.  It's not my favorite kind of job, but it has to be
> done.
>
> I have already made a note in the piano's data record that next time
> the piano is rebuilt it will need new keys!
>
> dave
>
>
> __________________________________________
> David M. Porritt, RPT
> Meadows School of the Arts
> Southern Methodist University
> Dallas, TX 75275
>
>
> ----- Original message ---------------------------------------->
> From: David Love <davidlovepianos@earthlink.net>
> To: Pianotech <pianotech@ptg.org>
> Received: Thu, 10 Jun 2004 17:33:18 -0700
> Subject: Pulley Keys
>
> >Anybody want to share favorite methods for fixing pulley keys?
>
>
> >David Love
> >davidlovepianos@earthlink.net
>
>
>
> >_______________________________________________
> >pianotech list info: https://www.moypiano.com/resources/#archives
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>
>
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives