[pianotech] Old Upright Blues

Susan Kline skline at peak.org
Fri Jan 21 21:47:08 MST 2011


On 1/21/2011 7:57 PM, Roger at Integra.net wrote:
> I've notice that many technicians don't like replacing loose pins with 
> larger ones. I'm at a loss as to the reasons why. Can anybody explain 
> why replacing with a larger pin on an old upright is sanctimonious. It 
> seems like a quick and reliable fix. 

Oh, the note you fix will be just fine. But since it was loose from 
cracks down below in the first place, the bigger pin will spread the 
cracks and the neighboring notes will be toast.

Besides, the CA glue does wonders. And it's not that the pin is suddenly 
too small -- it's that the hole got too big. Exactly like stripped screw 
holes, with the same kind of drawbacks when putting in bigger pieces of 
metal instead of repairing the hole.

Susan Kline
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