<div>The stiffnesses of Titanium and SS are not very dependent on the = particular alloys chosen.</div> <div> </div> <div>Good point about assumptions Ron.  I guess one assumption is that= wear of the bridge pins is bad.  Hmm... could it actually be good, so= rt of like seating the wire into the pin?</div> <div> </div> <div>Time for bed in Tulsa, OK.  g'night y'all.</div> <div> </div> <div>Steve<br><br> </div> <div><span class="gmail_quote">On 12/2/05, <b class="gmail_sendername">= Ron Nossaman</b> <<a href="mailto:rnossaman@cox.net">rnossaman@cox.net= </a>> wrote:</span> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0= px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>> Hardened stainless stee= l gets my vote.  Not only is it harder (hence<br>> more wear r= esistant), it is also considerably stiffer than titanium. <br><br>Which alloys? Both titanium and SS.<br><br><br>> The more flexib= le titanium would bend more right where the pin enters<br>> the wood cau= sing higher stress right where you don't want it.  The<br>> st= ainless steel would spread the force over greater depth into the bridge. <br>><br>> Plus hardened stainless in these small diameters should be= relatively<br>> easy to make, hence cheaper, er..  less expen= sive than titanium.<br>><br>> Steve Fujan (BSME, MSME, PE)<br><br>Rig= ht. Now you just have to decide what the problem is, whether or <br>not the current mild steel bridge pins are actually the problem, how<br= >this problem manifests, and whether it might or might not be the<br>cappin= g material that is causing whatever the problem might prove to<br>be instea= d. So, exactly what problem will harder bridge pins correct <br>that denser, harder, and less moisture reactive capping material<br>won= 't? I see a number of assumptions being made here that need<br>clarificatio= n. Not from just you, Steve, but in general.<br><br>Ron N<br>______________= _________________________________ <br>pianotech list info: <a href="http://www.ptg.org/mailman/listinfo/pia= notech">https://www.moypiano.com/resources/#archives</a><br></blockquote><= /div><br>