those pesky swings

[gordon stelter]

The Protek doesn't shrink anything. It lubes it up!
What I've always wondered is: from what elevation does
one drop the hamer in the swing test. From its total
limit of swing in one direction, with the flkange
pointing straight down? And which?
     Dumb question, I admit. But sometimes I'm not too
swift.
     Thump

--- tune4u@earthlink.net 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: Wimblees@aol.com 
>   To: Pianotech@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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