Alan: I've always attributed this to the heat and the side to side stress of the filing. I have no scientific proof but I always questioned the idea of stressing the new pins when it's just not necessary. If you have noticed as you remove old pins from a famous piano factory, many were installed point side down, and others round side down. That's why they had to file the tops to hide the irregular installation. dp David M. Porritt, RPT dporritt at smu.edu From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of reggaepass at aol.com Sent: Friday, October 29, 2010 8:04 AM To: pianotech at ptg.org Subject: Re: [pianotech] Steinway M ballpark value Ron, I, Terry, and a bunch of other folks drill bridge pin holes deeper than necessary, and drive the pins in to finish height, without filing the tops. I've noticed (and brought this up previously) that pianos with filed bridge pins tend to have looser pins over time in the environment around here than those that are not filed. (Although this could also be a "pressed-in rather than pounded-in" difference as well.) Think there is anything to that? Thanks, Alan Eder -----Original Message----- From: Ron Nossaman <rnossaman at cox.net> To: pianotech <pianotech at ptg.org> Sent: Thu, Oct 28, 2010 12:33 pm Subject: Re: [pianotech] Steinway M ballpark value On 10/28/2010 6:20 PM, Daniel Carlton wrote: > Terry > What's this about your pins bottoming out? There is no acoustic benefit to having the bridge pins bottomed out. Seating pins just means you have seated the strings by the friction between the string and pin. I, Terry, and a bunch of other folks drill bridge pin holes deeper than necessary, and drive the pins in to finish height, without filing the tops. If you try to bottom one of these pins in the hole, you'll drive it below the cap surface trying. Ron N -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101029/fabea047/attachment.htm>
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