> THIS MESSAGE IS IN MIME FORMAT. Since your mail reader does not understand this format, some or all of this message may not be legible. ---------------------- multipart/alternative attachment Roger, I am always very interested in learning all possible ways of eliminating hammer weight. The best way I have seen so far, was in the Renner factory, where there are twp ways : Using a circel saw, or a very heavy, very shrap handheld blade. Would it be possible to send a picture/drawing of your jig to the list? Friendly greetings, Andr=E9 Oorebeek Hi Charles, Reduction of hammer mass can be accomplished more efficiently by removing felt and wood. I have a jig that I use on a table saw that makes a tapered cut on both sides of the hammer. By starting the cut about 1/4" from behind the strike point the felt removal will drop the hammer mass dramatically. the table saw approach also gives more consistency from hammer to hammer. Removing shank mass in the upper treble is a technique for altering tone quality as opposed to touch correction. Reducing shank mass in the bass can lead to problems, re shank strength vs the weight of the hammer. It is very easy to remove up to 2 grams on #1 bass hammer with this method, which translates to 10 grams DW on the average piano. If you are working with mahogany moldings the amount of touch weight correction by jus= t tapering or coving the tails is very limited. The amount of touch weight correction from the shanks, (length X mass) is quite limited. I reserve shank reduction for voicing corrections, it is very usfull to get rid of the "woody thunk" that is some times encountered, hard to describe on paper. Thinning the shank can increase the whip lash effect of the shank, and help reduce the dwell time, creating a clearer more focused tone quality. Some food for thought, How much felt mass vs molding in the centre and bass section of the keyboard? Regards Roger ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/08/21/7a/67/attachment.htm ---------------------- multipart/alternative attachment--
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