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<DIV><STRONG><FONT face=Arial>Hi Don,</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>Would you enlighten us, on the method used to make
the roughness on the broaches?</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>Thank you.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>Regards,</FONT></STRONG></DIV>
<DIV>John M. Ross<BR>Windsor, Nova Scotia, Canada<BR><A
href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</A></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=donmannino@attbi.com href="mailto:donmannino@attbi.com">Donald
Mannino</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, April 11, 2003 3:29
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Broach roughness - Was:
Repinning flanges</DIV>
<DIV><BR></DIV><FONT size=3>Clyde,<BR><BR>You are right - the old APSCO
broaches were really nasty, with the rough area knurled and much too
agressive. Hopefully Schaff threw them all out when theybought APSCO,
but I don't realyl know. The rough area is supposed to be subtly rough,
with something like the grit of fine sandpaper, maybe 320 grit or finer.
The point is that the felt should not be chewed up when reaming, and the
reaming area should not be larger than the smooth area, or the smooth area
would not do a good job of burnishing the cloth.<BR><BR>If the broach gets
clogged up, the cloth has very likely been lubricated with something that has
become gummy. I run into this sometimes, and it immediately throws up a
red flag. If the cloth is gummy and sticky, there's a very good chance
that reaming and repinning is not going to be a permanent solution. The
gumminess will rear it's ugly head again, and the action will go
sluggish. In this case you might consider cleaning all the bushings with
naptha, then keeping a cloth nearby to clean the broach
occasionally.<BR><BR>With clean dry bushing cloth, a quick tap on the edge of
the workbench is all that is needed to shake out any wool dust that has
accumulated on the broach. I have had broach sets that were used to do
many, many sets of action parts that kept working like new.<BR><BR>Don
Mannino<BR><BR>At 06:45 AM 4/11/2003 -0400, you wrote:<BR>
<BLOCKQUOTE class=cite cite="" type="cite">Friends,<BR><BR>I discovered
quite by accident at a PTG convention, when looking over tools,<BR>that the
rough part of broaches can be quite different. I have used the
same<BR>set for years, and the rough part is not rough enough to "clog
up." They<BR>always worked fine for me.<BR><BR>But I came across a set
that was so rough that it looked to me like they stood<BR>a good chance of
removing too much felt. I would be afraid to use them
unless<BR>someone else looked at them and said, "Oh, yes, that's the way my
set is, and<BR>they work fine." I'm not going to buy such a set just
to try it out.<BR><BR>Regards,<BR>Clyde<BR><BR>David Love wrote:<BR><BR>>
In the process of repinning the action using broaches, I found that
the<BR>> roughened part of the broach kept clogging with felt which
reduced it's<BR>> cutting
efficiency.<BR><BR>_______________________________________________<BR>pianotech
list info: <A href="https://www.moypiano.com/resources/#archives"
eudora="autourl">https://www.moypiano.com/resources/#archives</A>
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