leather bushings

[David Ilvedson]

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I think it's time for Jurgen to start handling veg-tanned, different th=
ickness leather bushing material.   

David Ilvedson, RPT
Pacifica, California




Original message
From: "MICHAEL MORVAN" 
To: Pianotech 
Received: 11/7/2005 1:18:27 PM
Subject: leather bushings


List,
    If you use veg-tanned leather there is not a corrosion problem with=
 the pins. Chromium tanned leathers are the corrosive culprits. Mike Mo=
rvan Blackstone Valley Piano
----- Original Message ----- 
From: Erwinspiano@aol.com 
To: pianotech@ptg.org 
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 dis=
appointed at the extreme wear factor on all the bushing cloths we've tr=
ied. 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 s=
loopy as before 
  SO when I get done with this post I'm ordering the Kangaroo stuff fro=
m Schaff. I see no other alternative.
  I'm currently reworking a 1958 7 ft Petrof. Nice piano. The center ra=
il 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 c=
an 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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