It is also possible to thread the let off buttons before trying to mount them by mounting a small tap into a drill press and lowering the tap into the pre-drilled hole. The taper on the tap will self center and you can turn the quill by hand or by pulling on the V-belt to spin the chuck into the wood. McMaster Carr sells taps as small as 2-56 and 3-48 one of which should match rather closely the threads on the let off wires. Once they are pre-threaded they will align nicely when installed. If you want an exact match on the threads and don't want to order a tap you can always find a let off eyescrew with the same threads you are using and snip off the eye, mount the remainder in the drill press chuck and with a mill file introduce a taper onto the wire by filing three sides flat and angled toward the center of the wire to make tapered thread cutters. This will make a tap that will work for several sets of wooden buttons. Regards Norman Cantrell, Registered Piano Technician -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100823/5fe484ea/attachment.htm>
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