Bridge Pin Height Regulation, was: More, More (was Re:Thar She Blows!)

[Farrell]

Arrrggggg! I have done that same technique on an old bridge as part of refurbishing the bridge. I'd be afraid to do that on a new bridge. I suspect there is always some resonable concern regarding how much epoxy is absorbed into the wood and out of the void between pin and wood before the epoxy hardens. My plan is to swab the hole with unthickened West System epoxy and drive the pin into a normal tight hole.

Terry Farrell
  
----- Original Message ----- 
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Pianotech" <pianotech@ptg.org>
Sent: Wednesday, May 21, 2003 10:28 AM
Subject: Re: Bridge Pin Height Regulation, was: More, More (was Re:Thar She Blows!)


> > >What do bridge pin pounders that don't like to file use to regulate bridge
> > >pin height. I find that using a little piece of wood as a gauge seems to
> > >work well until you are finished, and then you realize your pin heights
> > >are still undulating. Then if you go and try and touch up, you end up with
> > >some pins just too darn short.
> > >
> >
> 
> I have yet to notch and drill a brand new bridge, but I have tried various
> approaches to replacing bridge pins and after all is said and done, I've come
> to the conclusion that pounding the pins in is not a positive to begin with. I
> use a pin size that is just slim enough that I can insert it with my fingers,
> and I fill the hole first with thin epoxy so that when the pin goes in it
> squezzes the glue up and around the pin hole opening forming a collar which I
> clean off.
> 
> This seems to give the best results both in the immediate and over the long
> term. It also takes care of whatever benifit may be had from the pins being
> inserted all the way to the bottom of the hole, as the epoxy takes up whatever
> space is there. Pins can all be of the same length to begin with, just make
> sure they are short enough for the shalowest hole that they'll go in deep
> enough so that you can minimize (or leave out altogether) the whole filing
> process.
> 
> RicB
> 
> 
> 
> --
> Richard Brekne
> RPT, N.P.T.F.
> UiB, Bergen, Norway
> mailto:rbrekne@broadpark.no
> http://home.broadpark.no/~rbrekne/ricmain.html
> http://www.hf.uib.no/grieg/personer/cv_RB.html
> 
>