It's an odd size and you won't find it anywhere. Reconditioning the old ones is quite doable and Paul Revenko-Jones article on such a procedure that appeared in the PTJ awhile back is very useful and detailed. Pianotek also sells a universal agraffe replacement kit that involves fitting an insert into the plate that the 1/4" agraffe will screw into. The correctly sized drill and tap are also part of the kit. You might ask them about that. It is fairly easy to do and though it does take a bit of time I'm not sure it's more involved than reconditioning the old ones. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Nick Gravagne Sent: Wednesday, March 04, 2009 1:08 PM To: pianotech at ptg.org 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
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