Frank: What is the argument for "equal" bearing front and back? Paul -----Original Message----- From: pianoguru at cox.net To: pianotech at ptg.org Sent: Sun, 23 Nov 2008 1:51 am Subject: Re: [pianotech] Downbearing ---- William Monroe <pianotech at a440piano.net> wrote: > Does anyone try to separate the components (front/rear bearing) in setting up a new board? In evaluating an existing board/bridge? Absolutely! There was a time at Baldwin that their procedure was to set the overall bearing, disregarding front and back bearing. Things had drifted over time, away from the original design intent, and nobody knew it, because nobody checked it. In some cases the front bearing was five times what it was supposed to be. The back bear was four time the value it should have been, but in the wrong direction, up-bear, that should have been down bearing. The overall bearing measured correct, so it was good to go. I will go a step further and say that it is not only important that front and back bear be controlled in some way, but that they should be equal. Frank Emerson -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20081123/ac1847ea/attachment.html>
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