those pesky swings

[Roger Jolly]

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Hi Alan,
             A dab of CA glue will be a lot better.  That dope attracts 
moisture, and can lead to other problems. There is often a hair line crack 
from the birds eye, that's the cause of the problem, the CA will solve that 
also, dope will not.
Fixed many in this manner. If I fix the birds eye I will always ream, and 
go up a size for the new pin.
Regards Roger


At 03:27 PM 12/16/02 -0600, you wrote:
>Interesting question about what I see as an imperfect science, at best. 
>I'm wondering if just testing the hammer for side-to-side motion while 
>holding the butt (upright) or flange (grand) would be accurate enough to 
>indicate wobble problems.
>
>Here's a weird idea: Has anyone tried a drop of "pinblock restorer" in a 
>worn birdseye to tighten it's grip on the pin? The most horribly wobbling 
>hammers obviously occur when the pin has slipped out of one side of the 
>flange, which surely indicates a worn birdseye, rather than redoing the 
>bushings and repinning, I wonder if "dope" would work.
>
>Alan Barnard
>Salem, MO
>----- Original Message -----
>From: <mailto:Wimblees@aol.com>Wimblees@aol.com
>To: <mailto:Pianotech@PTG.org>Pianotech@PTG.org ; 
><mailto:caut@ptg.org>caut@ptg.org
>Sent: Monday, December 16, 2002 1:58 PM
>Subject: those pesky swings
>
>We all know that a hammer is supposed to swing 4 - 8 times. If it is less 
>than 4, then the bushing is too tight. If it's more than 8, supposedly the 
>bushing is not tight around the pin, and that might cause the hammer to 
>wobble up to the string, which will eventually lead to uneven wear on the 
>hammer, whcih creates tone problems, ya da, ya da.
>
>So here is the problem. I've got this hammer with only 3 swings. So that 
>mean the bushing is too tight. Before I take the pin out, ream the 
>bushing, and put in the same size pin, I put a little Protec on the 
>bushing. But now, all of a sudden, I've got 10 - 12 swings. According to 
>the above presumption, the bushing is now not tight around the pin any more.
>
>Or is it? Has the introduction of Protec shrunk the bushing to the point I 
>need to ream and repin with a larger pin? Or do I leave the original pin 
>in there, and allow the 10- 12 swings?
>
>Wim

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