Upright Hammer Shank Length

Joseph Garrett joegarrett at earthlink.net
Mon Apr 3 17:55:36 MDT 2006


John Ross said: "I'm installing a new action in an upright. I need to find the "sweet" spot up at C88 to determine how long to cut the shanks (determine strike point). Doing this on a grand piano is so easy by sliding the action in and out a bit and the hammer assembly can be glued nice and firm for good sound production."

Hmmm? The only problem with that is that the 'set screw' would add mass, which would have an effect on the duration time of the hammer contact. I think I'd opt for the extra hammer butt with the set screw on it. That way the "mass" would be less of a factor. Just a thought.<G> 


Joe Garrett, R.P.T. (Oregon)
Captain, Tool Police
Squares R I
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