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<DIV><SPAN class=671354917-08012005><FONT face=Arial color=#0000ff =
size=2>It's a
throwback to my days as a design engineer. It is bad practice to place =
any kind
of stress concentrator against cast iron. The washer is a little =
insurance
to distribute the load, though ideally it should be hardened to maximize =
its
effectiveness.</FONT></SPAN></DIV>
<DIV><SPAN class=671354917-08012005><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=671354917-08012005><FONT face=Arial color=#0000ff =
size=2>Thanks
for the tip on the hole.</FONT></SPAN></DIV>
<DIV><SPAN class=671354917-08012005><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=671354917-08012005><FONT face=Arial color=#0000ff =
size=2>Dean</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> =
pianotech-bounces@ptg.org
[mailto:pianotech-bounces@ptg.org]<B>On Behalf Of =
</B>Terry<BR><B>Sent:</B>
Saturday, January 08, 2005 11:34 AM<BR><B>To:</B> =
Pianotech<BR><B>Subject:</B>
Re: seeking wood screws<BR><BR></FONT></DIV>
<DIV><FONT face=Arial>Why do you put a washer on top of the =
up-side-down lock
nut that goes on the backside of the plate - assuming of course that =
the nut
has enough horizontal surface area to mate with the plate (and not =
want to
fall through the hole)? I would just be afraid of a potential =
rattle/buzz if
one of the assemblies got a little loose (I realize that none should =
be). I
just haven't found that to be needed. I do put a washer on the top =
though -
but mostly to protect the plate finish while tightening the acorn nut =
on
top.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>5/16-inch hole gives me a nice very snug
fit.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Terry Farrell</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial"> </DIV>
<DIV><SPAN class=906561315-08012005><FONT face=Arial =
color=#0000ff
size=2>All this talk of screw sources has had me browsing some of =
these
sites. Very cool. I've always tried to maintain an organized supply =
of
various screw types and sizes which has been a huge asset. But it is =
not
always easy to get big boxes of the sizes you want any more. Most =
places
only sell the little 15 piece plastic packages (very expensive =
way to
buy screws).</FONT></SPAN></DIV>
<DIV><SPAN class=906561315-08012005><FONT face=Arial =
color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=906561315-08012005><FONT face=Arial =
color=#0000ff
size=2>Anyway, I have been wanting to do the plate suspension =
trick for
adjusting downbearing. Del spoke of it at the recent Indy =
conference. This
involves threading socket cap screws (headless bolts with recessed =
allen
socket) into the inner rim, running down a lock nut upside down with =
a
washer on top (a sufficient clearance well counterbored into the
soundboard), the plate lowered onto the washer, a chrome washer and =
acorn
nut on top. The height of the plate can then be easily raised or =
lowered by
removing the acorn nut and turning the stud with and allen wrench.
</FONT></SPAN></DIV>
<DIV><SPAN class=906561315-08012005><FONT face=Arial =
color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN class=906561315-08012005>Attached is what I =
ordered. I got the
hanger screws just for fun. If the machine thread doesn't work well, =
which
Del said it would thread right into the wood, I can always fall back =
on the
hanger screws with their lag thread. </SPAN></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=906561315-08012005></SPAN></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN class=906561315-08012005>Does anyone have a =
recommended hole
size to drill the rim for the 3/8" machine thread to screw
into?</SPAN></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=906561315-08012005></SPAN></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=906561315-08012005>Blessings,</SPAN></FONT></FONT></DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=906561315-08012005></SPAN></FONT></FONT> </DIV>
<DIV class=OutlookMessageHeader align=left><FONT =
face=Tahoma><FONT
size=2><SPAN =
class=906561315-08012005>Dean</SPAN></FONT></FONT></DIV>
<BLOCKQUOTE><FONT face=Arial
size=2></FONT> </BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTM=
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