[pianotech] palm nailerette

[reggaepass at aol.com]

Yes, Frank.? As I replied to John F. who raised this same point, on our Steinways, Bosendorfers and rebuilds (the instruments that have developed loose bridge pins), yes, the bridge pins have been filed or ground (unlike on the Yamahas).? That could be what makes the difference, although Ron N.?suspects?bridge cap?material.

Thanks,

Alan Eder


 Did you happen to notice evidence of surfacing the 
ends of the pins to level them?  Perhaps the cause and effect relationship has 
less to do with pounding vs pushing, and more to do with leveling the tops, or 
not, or by what means.




-----Original Message-----
From: pianoguru at cox.net
To: pianotech at ptg.org
Cc: reggaepass at aol.com
Sent: Mon, 16 Feb 2009 5:16 pm
Subject: Re: [pianotech] palm nailerette



---- reggaepass at aol.com wrote: 
>if there IS a marked difference between pounding in vs. pushing in, 

In a "previous life" it was discovered in a factory where I worked that filing 
the tops of bridge pins to level the tops created just enough heat to make the 
pins loose, down the road.  I always hate the practice anyway, because it often 
produces nasty sharp edges on the tops of the pins.  Pushed pin can more easily 
be controlled to level off at the same height without the need of filing the 
tops to level them.  While pound the pins, on the other hand, it is difficult to 
level the tops without filing, grinding, or other such things that generate heat 
and ultimately looseness.  Did you happen to notice evidence of surfacing the 
ends of the pins to level them?  Perhaps the cause and effect relationship has 
less to do with pounding vs pushing, and more to do with leveling the tops, or 
not, or by what means.

Frank Emerson

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