Questions about key bushings. - bushing material -tools

[Isaac OLEG]

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Re: Questions about key bushings.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 réparation 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 : Vincent E. Mrykalo [mailto:mrykalve@potsdam.edu]
  Envoyé : jeudi 17 avril 2003 15:43
  À : 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 Bšsendorfer 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


    Isaac OLEG

    Entretien et rŽparation 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)
      EnvoyŽ : mercredi 16 avril 2003 18:01
      Ë : 'College and University Technicians'
      Objet : RE: Bass string fest

      I just checked·weâve replaced 16 bass strings since school started at
the end of Sept· not too bad, considering. Most of this breakage is in the
piano major rooms where the pianos do get pounded on. Obviously I donât
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



      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




--
Vince Mrykalo RPT MPT
    Senior Piano Technician
    Crane School of Music

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