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<blockquote type="cite" cite><font face="Arial" color="#000000">Well,
I suggest when yours start making noise you let us know and I'll do
the same. I simply don't see the ANY logic in replacing the same
with the same...the brass pitmans and all of the other wooden pitmans
all had rounded polished ends at one time...and they all creaked...it
wasn't the bushed hole in the keybed...</font></blockquote>
<div><br></div>
<div>It is the sliding friction on the OEM pitman which causes the
creaking.</div>
<div>As the pedal is depressed and since the pitman is restrained
vertically</div>
<div>in the bushing, the pitman becomes closer to the fulcrum;
hence</div>
<div>the scrubbing. With a replacement pitman being fixed on the
radii, the</div>
<div>pitman swings further from the fulcrum. Think of a tangent drawn
to a</div>
<div>radius, a point 1/2" from that radius is going to be further
from that tangent.</div>
<div><br></div>
<div>By your reasoning you should replace the pedal rods with dowels
with</div>
<div>leather or felt on the ends so they won't develop creaking.</div>
<div><br></div>
<div>I have been thinking of switching to a 5/16" dowel simply
for the ease of</div>
<div>fabrication. The ends would be polished and lubrication in the
socket</div>
<div>but it is a broader surface which might induce more friction and
run</div>
<div>the greater risk of creaking but since the sliding motion is
replaced by</div>
<div>pivoting motion the risk is low. Next time I pull the action on
this M in</div>
<div>the shop I'll examine this forwards excursion to see what size
dowel</div>
<div>would accommodate (without having to remove material from the
hole)</div>
<div>but looking at the trapwork just now, the majority of this
forwards motion</div>
<div>is at the tray with the rod mostly pivoting below.</div>
<div><br></div>
<div>Wasn't the wooden pitmans replaced with the metal ones in order
to</div>
<div>reduce friction because of the higher polish achieved on the
ends?</div>
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</pre></x-sigsep>
<div><br>
Regards,<br>
<br>
Jon Page</div>
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