Rebushing S&S Damper Rail

[Paul]

Paul
We found that the #7 bridge pin actually makes a sloppy fit for the damper
wire. There seems to be plenty of  room for the felt to swell and shrink
with the humidity. We did not do any measuring with humidity swings and how
it may affect the bushings, but we did find that most of the pianos seem to
use this size except Yamaha. They like to have their bushings a little
tighter. South Eastern Minnesota has very wide swings in humidity. But, the
techs in the area  that I know don't mention guide rail bushings being a
problem. We did mike the damper wire to compare it to the #7 pin. There is a
significant difference, but I don't recall the dimensions. Regulate your
dampers so the damper wire gently rides on one side of the bushing. We find
this the most successful. Some of our jobs were done several years ago. To
date we are not having any trouble.

Paul Chick
----- Original Message -----
From: Paul McCloud <smccloud@ix.netcom.com>
To: <pianotech@ptg.org>
Sent: Friday, September 29, 2000 10:54 AM
Subject: Re: Rebushing S&S Damper Rail


> Paul:
>     I am just finishing my rebush job, using two strips of felt.  I was
> wondering, since I sized the holes with a bridge pin, and the pin is
> very tight, will the hole close up after some time and moisture
> changes?  I fear that although the holes are just right now, maybe I'll
> be doing some bushings again in the future.
>     Paul McCloud
>