[pianotech] squeaking leather key bushings

[Shawn Brock]

Hi Gregor,

I had this problem in a S&S L that another Technician had rebuilt.  The cause of the squeak was he had bushed the keys with the smooth side of the leather facing the keypin.  I used a lot of Teflon powder to lubricate the bushing and so far that has worked.  Its been about a year and the squeak hasn't returned.  The piano owner plays it about 6 ours a day so I would guess that the powder is staying in the bushings pretty good.  Just to be safe hit the knuckles with a little Teflon as well.

Regards,
Shawn Brock, RPT 
  ----- Original Message ----- 
  From: Gregor _ 
  To: pianotech at ptg.org 
  Sent: Saturday, March 21, 2009 8:24 AM
  Subject: [pianotech] squeaking leather key bushings


  List,

  what would you use to eliminate the squeaking of old leather key bushings? I assume nothing that is liquid or greasy? What´s about talkum powder or teflon powder? And what´s about Protec CLP (which is liquid)?

  A customer called me today and complained about squeaking. I tuned her piano and eliminated some squeaking 6 weeks ago, but I can´t remember the origin of that squeaking nor what I did to fix it. Given that it was a key squeaking and not an action squeaking I assume that I applied some talkum powder to the leather. If so, it seems that this is not a long lasting solution for that problem. What would be better in the long run?

  Maybe that I am completely wrong and that the squeaking had another source, e.g. the center of the jack or whatever.

  Gregor


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