David- For accuracy, why not make a strip of wood or plastic with the contour, then drill the strip, then chop the little blocks. Make indexing jigs using a balance rail pin to hold the strip while you drill or cut. The concept looks very workable. There would probably be a slight change in key height when the blocks were turned. Ed Sutton -----Original Message----- >From: David Love <davidlovepianos at comcast.net> >Sent: Jan 2, 2012 8:52 PM >To: pianotech at ptg.org >Subject: [pianotech] Method for cutting balance rail bearings > >Attached is a crude drawing of a balance rail bearing. I posted this >question on the new list in response to something but ran into a road block >trying to get this drawing posted along with it, at least easily. I've been >trying to figure out a way to produce this type of cut (the diagonal line >represents the cut) uniformly on a set of balance rail bearings such that by >turning them either with the cut facing forward or back you could change the >action leverage easily and quickly. Looking for production ideas. The >bearing would need to be cut and then probably covered with felt, although I >suppose you could simply drop an unglued punching right down on top. > >Let me know what you think. > > >David Love
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