----- Original Message ----- From: Ted Sambell To: College and University Technicians Sent: Tuesday, July 11, 2006 7:39 PM Subject: a picture for you It is almost impossible to file the strike surface of a hammer truly square across by filing each hammer individually. Don Mannino advocates that one finish by lightly gang filing with very fine paper on a wide paddle. To do this, support a group of hammers on a piece of board and just go over the strike points. I assume this is a standard Kawai practise.This eliminates a great deal of hammer fitting. It does not make sense that agraffe holes are usually out of level; after all, they are made in large quantities on automatic machines and look pretty consistent. One should make certain that the hammers are twisted straight and filed square as stated. The attached photo is of a finishing hammer file designed by Chris Gregg. He has made them and sold them through Joe Goss (Mother Goose Tools). They do a beautiful job and also reduce the amount of string lifting significantly. Freehand filing simply cannot match the results . I usually work with two, one with 120 grit and the second with 1500. If you have access to a drill press and a 2-1/2" Forstner bit, these are simple to make. Ted Sambell You have been sent 1 picture. http://tinyurl.com/pqvof http://ptg.org/pipermail/files/attachments/20060712/b04e8f0e/ attachment-0001.jpg
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