Don't know...maybe fluffing up the bushing? I've have been doing a lot of repinning...I'm now in the 5 - 6 grams camp for hammer flanges. How are you measuring your flanges...? David Ilvedson, RPT Pacifica, CA 94044 ----- Original message ---------------------------------------- From: "Allen Wright" <akwright at btopenworld.com> To: "Pianotech List" <pianotech at ptg.org> Received: 5/14/2008 4:27:23 PM Subject: center pinning question >In repinning an old (1930's) Steinway M, quite a few were loose. I >found that replacing the old pins with the exact same size (but new) >pins was producing just the amount of friction needed - and even in >some cases adding too much, so that I had to ream with my "Mannino" >burnishing files. Any theories on how that happens? Something to do >with the nap of the cloth changing in the process, or perhaps the >angle of the pin changing in the bushing, or (even more unlikely) >that somehow only the outer edges of the pin are slightly worn on the >old pins? (These are the various ideas me and my colleagues were >coming up with to explain the phenomenon). >Thanks, and I'll take my answer off the air... : ) >Respectfully, >Allen Wright. RPT
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