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<DIV><FONT face=Arial size=2>Dean,</FONT></DIV>
<DIV><FONT face=Arial size=2>Try 2 passes, your last pass being a micro pass,
new, sharp bit, different rpm and speed rates.</FONT></DIV>
<DIV><FONT face=Arial size=2>Fenton</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mfarrel2@tampabay.rr.com
href="mailto:mfarrel2@tampabay.rr.com">Farrell</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> Friday, March 14, 2008 8:31
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: key trimming bit</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial>Dean, I don't know a darn thing about trimming keytops,
but I have used spiral router bits a fair bit. If the router is above the
keytop, shouldn't you be using a down-cutting spiral bit to minimize breakout?
A downcutting bit should leave a smooth cut on the top (router side) surface
at the potential sacrifice of the lower surface (although if there is wood
bonded to the underside of the keytop, I should think that there will be no
breakout on the underside of the keytop).</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Terry Farrell</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I am using a Spurlock style set
up to trim my keytops and am having trouble with the plastic chipping out on
the notch cutting station. I am using a 1/2 inch spiral carbide up cut bit
from McMaster Carr (27395A31). Is there a better router bit I can be using
here? <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoAutoSig style="MARGIN: 0in 0in 0pt"><U1:PERSONNAME
u2:st="on"><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy">Dean
May</U1:PERSONNAME> </SPAN></FONT></P></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>