Not meant as a criticism, just a comment. I'm usually exchanging #6 pins for # 7 at least in the capo section on many pianos so it requires a drill out anyway. Similarly, most bridges extend #7 pins down through the tenor and I often go up one size to #8s with predrilling to insure a tight fit. Also, drilling out insures I don't have to grind down the tops of the pins. Maybe it doesn't heat them up or stress them but there is a difference between string pressure and file or belt sander pressure, namely that the string applies pressure nearer the cap. The file or belt sander applies pressure at the very top of the pin which can be quite a ways from the cap. Some flagpolling can take place which can stress the fit at the cap. In general, I don't file or sand the tops of the pins for that reason. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of William Monroe Sent: Wednesday, January 20, 2010 7:11 PM To: pianotech at ptg.org Subject: Re: [pianotech] Renotching-Repinning-Reusing Bridges in rebuild Sure, each their own. For the most part I guess it feels like trading one task for another. Epoxy size the hole and drill out, or dip the pin and drive in? Probably a wash for me. Yes, you really do need to wear gloves when driving in the pins and shoe-shining the cap, but it's really a very localized process for me. As for stressing the pins, unless you really bear down on the pins, or sit in one place, there is no danger of lateral stress or overheating. Certainly nothing approaching what the strings themselves do, I would think. I've heard the arguments, and I think it's a reasonable concern, but as with most things in this biz, if you use appropriate care with this process, there is no cause for concern. I certainly don't think my was is the only way, or the "better" way, just one that works for me. William R. Monroe On Wed, Jan 20, 2010 at 6:02 PM, David Love <davidlovepianos at comcast.net> wrote: I used to do the epoxy in the pins thing but decided there wasn't much reason for having to deal with the mess. By sizing the holes even slightly with epoxy and reinforcing the wood you can run a drill quickly down through to insure uniform depth and diameter and a clean surface. After that, inserting the pins and just securing with a drop of thin CA is plenty to secure them. I don't particularly like to file or belt sand the pins as I think there's no need to either heat them up or put lateral stress on what should be a tight fit. David Love -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100120/59661caf/attachment-0001.htm>
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