David, I lean towards that kind of explanation, as well, although still it's a bit hard for me to understand how nap change or fluffing could create the amount of increased friction that I sometimes find. With this set I was just using the swing test, but if need be I have my stupidly expensive Correx gauge as well. The increased friction with the new pins was very noticeable, though - however you measured it - and I mic'd quite a few to be sure I wasnt' imagining this, or missing something. Allen Wright, RPT London, UK On May 15, 2008, at 1:22 AM, David Ilvedson wrote: > 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 Allen Wright London, UK http://www.broadjam.com/akwright -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080515/3c6814f4/attachment-0001.html
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