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Re: Questions about key bushings.Isaac-
I've used leather keybushings, and have found that 2 or 3 applications =
of ballistol are needed for free movement of the front keybushing. This =
was not for noise, but due to performer's complaint of too much =
friction. Balistol is promoted as a leather preservative. I've found =
leather front keybushings in German pianos of the late 19th century in =
remarkably good condition.
The keypins, of course, were beautifully smooth and polished.
Ed S.
----- Original Message -----=20
From: Isaac OLEG=20
To: Vincent E. Mrykalo ; College and University Technicians=20
Sent: Thursday, April 17, 2003 4:58 PM
Subject: RE: Questions about key bushings. - bushing material -tools
Hello Vincent,
I asked around me, nobody tells me that he uses oil (Ballistol or =
such) on leather bushings, neither in Bechstein factory or elsewhere.
I was told on the contrary that the leather needs less side play than =
the cloth, but that when it takes a slight amount of play it will be =
more noisy soon.
My main concern is using it on the front key bushings, I don't recall =
having seen that done on any instrument, I guess the friction may be =
high.
I also have been highly praised the good quality clothes with nylon =
(or ?) inside that comes from Japan, as to be a material of choice for =
bushing work (info from a friend, tech for the Paris school of music, =
he does 40 key bushings set/year approximatively)
By the way he tells me to use some acid oxalic if precedent bushings =
have been glued with a hard white glue, a pass with a damp rag and an =
iron using this acid (don't smell the fumes) soften the glue fast he =
tells me.
Another useful information is that cork grease is not acid so it =
eventually is better than mutton tallow for leather/metal lubrication. I =
don't use it on key pins nowadays, only Teflon spray, and a very good =
quality I have from Sweden (McLube 125).
He also tells me he made 3 complete keyboard sets with the =
OLIAG/JAHN's key restoration tool (same kind than the Onesti tool but =
guided by the cylindrical hole in the key) and he have a perfect font to =
back placement and centering. But he made himself the wood washers, the =
ones sold originally with the tool are totally useless (too soft wood).
Greetings
Isaac OLEG
Entretien et r=E9paration de pianos.
PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77=20
-----Message d'origine-----
De : Vincent E. Mrykalo [mailto:mrykalve@potsdam.edu]
Envoy=E9 : jeudi 17 avril 2003 15:43
=C0 : oleg-i@wanadoo.fr; College and University Technicians
Objet : Re: Questions about key bushings.
Isaac,
Do you use Balastol on the renner leather? They do recommend that, =
as that may help the noise problem. The one thing about leather is that =
they need to be eased a little more drastically than felt, so you can't =
get as snug a fit.
Dear colleagues,
I have just seen the 20 instruments that are in a little school I =
will work for next year.
These instruments are 30 to10 years old. Since 3 years, a lot of =
work have been done on almost all instruments, so many have been =
repined, new strings on some, actions refurbishing, new key bushings.
The problem lies on these last, all the key bushing jobs are =
showing a lot of side play, and even front to back play in some case. I =
was wandering how an other while relatively decent (but not too =
expensive !) repair job could turn in a so inefficient result. May be =
the bushing cloth used was very poor, but, as even the one which are =
less worn are noisy, I suspect that white glue or Titebond have been =
used for the gluing, causing the hardness of the felts and the fast worn =
out.
I consider using leather, for the schools now, I made a few sets =
on the balance mortise, and find the job to be not very different. =
Indeed the leather (Renner) is a bit more noisy, but I prefer that to =
have to sell bushing work every 4 years.
My question was about using leather in the front mortise, and if =
every kind of key pin will accept the leather bushing. For instance =
brass key pins may be will be worn out by the leather more than by the =
felt, so the play will be there , finally.
Is not leather in the front bushing really to hard and noisy under =
the fingers ?
I've heard that some of you use kangaroo leather , where is it =
sold ? any feedback ?
I was pleased with the 2 sizes of the Renner bushing, on the =
Bechstein and the Bssendorfer I made I did not thin the leather it was =
very accurate ti begin with (and I did not use any oil on it, as someone =
wrote once, too afraid to have dirt and may be squeaks with this =
method).
Thanks in advance
Good Easter day to all, Pessah for some !
Isaac OLEG
=20
Isaac OLEG
Entretien et rZparation de pianos.
PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77
-----Message d'origine-----
De : caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]De la =
part de Wolfley, Eric (WOLFLEEL)
EnvoyZ : mercredi 16 avril 2003 18:01
=CB : 'College and University Technicians'
Objet : RE: Bass string fest
I just checked=B7we=E2ve replaced 16 bass strings since school =
started at the end of Sept=B7 not too bad, considering. Most of this =
breakage is in the piano major rooms where the pianos do get pounded on. =
Obviously I don=E2t place an order with Mapes every week, though I =
check.
~~~~~~~~~~~~~~~~~~~
Eric Wolfley
Head Piano Technician
Cincinnati College-Conservatory of Music
University of Cincinnati
~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: Wimblees@aol.com [mailto:Wimblees@aol.com]
Sent: Wednesday, April 16, 2003 11:40 AM
To: caut@ptg.org
Subject: Re: Bass string fest
=20
In a message dated 4/16/03 10:20:10 AM Central Daylight Time, =
WOLFLEEL@UCMAIL.UC.EDU writes:
I do a pass through the practice rooms approx.
once a week and place an order with Mapes.
This is interesting. I've been here at UA for almost 2 years, =
and I have had two bass strings break. Either you guys have harder =
players, or I'm extremely lucky. How many bass strings to some of you =
replace per week/year?
Wim
--=20
Vince Mrykalo RPT MPT
Senior Piano Technician
Crane School of Music
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