---------------------- multipart/alternative attachment Phil I agree with Dave & use very similar methods. By doing it this way the geometry & regulation is constant thru out the action. Dale Measure the string heights, for example, at either end of the agraffe section, let's say hammer 21 requires 1 13/16" bore and hammer 53 (or whatever) requires a 1 7/8" bore. Measure and mark the bore distance on the end hammers. Now clamp them together in the same manner you would to gang file them. Make sure that the strike point end for this group is in a straight line by butting it up against something solid. Now take a straight edge and using the bore markings on the end hammers (21 and 53) as a guide, strike a line through the group of hammers which will give you point at which you will bore on each hammer. Do that for each section, bass, tenor, 1st and 2nd capo. When you use the boring guide (I use the Renner one) you will have to eyeball where the drill hits the mark instead of using the premeasured gauge. In this case, a brad point drill will be the most accurate. Assuming that the string heights don't undulate (which they might) you will then have bored the hammers to the precise string heights within each section. If the string heights vary from section to section it doesn't really matter, you will capture it accurately this way. If you are using a non-Steinway hammer, like a Ronsen, order them not cut to length. Once you have bored them, you can then cut the tail lengths to exactly 1" by making a small jig with a dowel that indexes off the hole you've just bored. That will help give you uniform checking. After you have cut them to length, cove them with a Forstner bit and then shape the tails. David Love davidlovepianos@comcast.net Erwins Pianos Restorations 4721 Parker Rd. Modesto, Ca 95357 209-577-8397 Rebuilt Steinway , Mason &Hamlin Sales www.Erwinspiano.com ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/9d/fe/fd/05/attachment.htm ---------------------- multipart/alternative attachment--
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