[pianotech] Tuning pin torque???

[Dean May]

I suspect the problem is spongy plate bushings. Try a few drops of thin CA
on the bushing and see what happens.

 

I've been meaning to post on this. I've been doing this very treatment to
40s and 50s era spinets where the pins are still tight enough but there is
so much flag poling when you put any pressure on the pin that all of your
hammer force goes into bending the pin instead of torque to turn the pin.
I've been putting a little CA (about 1 oz, about half what I normally use to
treat a pin block) on the bushings and the results are pretty amazing. 

 

Dean

Dean W May                (812) 235-5272

PianoRebuilders.com    (888) DEAN-MAY

Terre Haute IN 47802

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Denise Rachel
Sent: Wednesday, February 24, 2010 9:45 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Tuning pin torque???

 

Hi

 

I have no answers for you.  but . . . . yesterday I tuned a Chinese Hardman
grand.  The pins were tight, but so spongy feeling that I felt like I was
bungie-tuning.  Awful!

 

Denise

 

 

On Feb 24, 2010, at 9:15 AM, Williams, James wrote:





Dear members:

 

I have recently purchased several new pianos and discovered during the
initial tunings what I believe to be minimal tuning pin torque. The pins
feel "spongy" and difficult to set. Is there an industry standard for pin
torque, and if so, what should that torque value be in inch pounds? Any data
on this subject would be greatly appreciated.

 

Sincerely,

 

James Williams, RPT

Dallas Chapter

 

 

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