Anecdote. ? Some years ago I rebuilt a Mehlin with the roll agraffs. Several?of them?had broken, and no replacements were available. With the help of a local metal shop owner, who was very cooperative,?I took the plate to him, and he set up a drill press to retap each hole. He charged me about $75, for about 2 hours worth of work. (not counting the time?he and I discussed the problem, and how to deal with? the plate, etc.) Wim -----Original Message----- From: Nick Gravagne <gravagnegang at att.net> To: pianotech at ptg.org Sent: Wed, 4 Mar 2009 11:07 am Subject: [pianotech] Agraffes -- Mason & Hamlin BB Hello All, Agraffes recently removed from a Boston M&H BB (#35000 circa 1927) are dimensioned at 0.280" stud (includes threads), and near as I can tell the TPI is metric at 0.75 but I don't take this to be accurate. Still, I couldn't get the gage's 32 or 36 TPI to line up right with the threads. The standard 1/4" stud just falls in the hole. A prior tech removed the originals and "cleaned" them up by sand blasting, or so it seems by the slightly pitted appearance; otherwise nothing is bent or weird looking. The string holes have not been touched or redressed. Pianotek does not offer this size (that I can see from the catalog), neither does Schaff. The idea of plugging and re-tapping for standard agraffes is, of course, possible but relatively time consuming, and there is no room for error. Anyone replaced these recently, and if so with what? Any reconditioning anecdotes worth sharing? Thanks Nick Gravagne, RPT Piano Technicians Guild Member Society Manufacturing Engineers Voice Mail 928-476-4143 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090304/a685db1b/attachment.html>
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