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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100224/8b44e54c/attachment-0001.htm>
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