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<DIV><FONT face=Arial size=2>There will certainly be some variation of opinion
on what "acceptable" tuning pin torque might be, but maybe about 60 to 150
in.-lbs. (note: inch-pounds, not foot-pounds) will yield a reasonable-tuning
piano. When you get up in the 200 in.-lb. range (like some new Baldwins, etc.)
those pins are so tight that it is difficult to fine tune the piano. Likewise,
as torque falls below 50 in.-lbs. or so, the pin might still hold pitch (at
least for a while), but it is hard to control/tune because it is so loose. Many
would pick the 80 - 120 in.-lb. tuning pin torque as being ideal.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>To measure torque accurately, it would be ideal to
have the string off the pin. Simply move the pin both ways with a torque wrench
and note the resistance to movement. If the string is on the pin, move it both
ways - it will give a higher reading pulling the pitch up and lower reading when
lowering the pitch - and average the two measurements together - that,
theoretically, should yield the same torque value as having no string at
all.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Hmmmm... how's the weather in Las Vagas this time
of year? Looooowwwww humidity? What kind of environmental conditions is the
piano being exposed to?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>BTW: What is a "Roger Williams
instrument"?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV><FONT face=Arial size=2> I have a new S&S "D" that I
need to measure the pin torque and I've been looking in all the literature I
have, searched the pianotech archives and I have found no information on what
would be acceptable ft/lb readings. Also, should I have the wire at the proper
tension or should I get a reading with the wire removed? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm ashamed to say that I have never
performed pin torque evaluation before. For a proper evaluation should I take
readings in every gauge of the scale? I really have no idea what the
proper procedure is to give a understandable evaluation for the factory to use
to determine the component condition. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The "D" is a Roger Williams instrument that was
built this year and pin tightness is minimal to the point of almost untunable.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Any help will be greatly appreciated.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>David Chadwick</FONT></DIV>
<DIV><FONT face=Arial size=2>Las Vegas</FONT></DIV></BLOCKQUOTE></BODY></HTML>