leather bushings

[MICHAEL MORVAN]

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List,
    If you use veg-tanned leather there is not a corrosion problem with =
the pins. Chromium tanned leathers are the corrosive culprits. Mike =
Morvan Blackstone Valley Piano
  ----- Original Message -----=20
  From: Erwinspiano@aol.com=20
  To: pianotech@ptg.org=20
  Sent: Monday, November 07, 2005 3:59 PM
  Subject: Re: Yamaha Key Bushing Replacement


     Ron & All
   After following up on many of our high use rebuilds I am extremely =
disappointed at the extreme wear factor on all the bushing cloths we've =
tried. It's primarily the front rail pins. In one church, 2 years of med =
heavy playing & many glissandos later the bushings are gone & keys as =
sloopy as before=20
    SO when I get done with this post I'm ordering the Kangaroo stuff =
from Schaff. I see no other alternative.
    I'm currently reworking a 1958 7 ft Petrof. Nice piano. The center =
rail bushings are in perfect tolerance. The fronts were felt & we =
changed those due to exessive slop.
    There may be a chance of corrosion on brass but right now I'd take =
my chances with the leather even on the brass pins. Hey if they last =
more than 2 years under heavy use then I'm even, if longer then I'm in =
the black.
    Dale Erwin

      We've considered leather bushings, but my understanding is that =
there can be a chemical reaction between the leather and the Yamaha =
brass key pins. I don't see that the supply houses offer plated/steel =
pins in the Yamaha size.

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