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<DIV><FONT face=Arial size=2>Allen,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It's hard to say for sure, but a few more
possibilities:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>- Pushing the old pin out disturbed the cloth
fibers substantially. This can happen especially when the original pin was
cut on both sides, and you have pushed a 'burr' through the bushing in the
process of extracting the pin. The pin extraction tool could also
theoretically be rough or bent at the tip, disturbing the cloth a lot when
pushing the pin through.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>- When installing the new pin, the point of a sharp
pin will sometimes snag wool fibers on the through the bushing, causing the
fit to become tight. This doesn't usually happen
consistently.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Don Mannino</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=akwright@btopenworld.com href="mailto:akwright@btopenworld.com">Allen
Wright</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 14, 2008 4:27
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> center pinning question</DIV>
<DIV><BR></DIV>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).
<DIV><BR class=webkit-block-placeholder></DIV>
<DIV>Thanks, and I'll take my answer off the air... : )<BR>
<DIV><BR class=webkit-block-placeholder></DIV>
<DIV>Respectfully,<BR><BR>
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class=Apple-style-span
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<DIV>Allen Wright.
RPT</DIV></SPAN></SPAN></SPAN></SPAN></DIV><BR></DIV></DIV></BLOCKQUOTE></BODY></HTML>