<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: Bridge notching</title></head><body> <div>Hi Phil, Newton and all,</div> <div><br></div> <blockquote type="cite" cite>> Rattling around in my brain is the factoid (or perhaps it's an > imaginoid) that at least one manufacturer (Boesendorfer is the name > that comes to mind) deliberately notch their bridges so that the edge > of the notch does not bisect the bridge pin hole (I believe they cut > the notches deep, but even that is hazy in my memory).<br> <br> > Phil F<br> </blockquote> <blockquote type="cite" cite>It is a misunderstoodoid.<br> <br> Beech (local hardwood) is softer than maple (our choice) so they k-notch<br> their bridges to bisect the pin.  As the string sinks into the wood the</blockquote> <blockquote type="cite" cite>termination then becomes equal on the vertical and horizontal plain.</blockquote> <div><br></div> <div>What's a K-notch Newton? Are you referring to the notch with a small vertical drop immediately the notch leaves the bridge top, such as the early Blüthners used. Fazioli started to use this technique around 1994. Is he still using it?</div> <div><br></div> <div>Bösendorfer use European maple for their bridges (known as Sycamore in the UK -<i> Acer pseudoplatanus</i>). Sycamore has an ADD of around 0.6 gr/cc, while European Beech (<i>Fagus sylvatica</i>)  has around 0.7 gr/cc , Rock maple (<i>Acer saccharum</i>) around 0.73 and Australian Antarctic Beech (<i>Nothofagus Morrei</i>) around 0.77gr/cc. I have seen enough bridge pins 'adrift' in Sycamore bridge caps to believe that it is a little light for such service. I'm recapping a couple of sections on a 20 year Bös 6'8" at present.</div> <div><br></div> <div>Regards,</div> <div>Ron O.</div> <x-sigsep><pre>-- </pre></x-sigsep> <div>_______________________<br> <br> OVERS PIANOS - SYDNEY<br> Grand Piano Manufacturers<br> <br> Web: http://overspianos.com.au<br> mailto:info@overspianos.com.au<br> _______________________</div> </body> </html>