<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Nov 13, 2006, at 11:43 PM, Fred Sturm wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">So I started out, expecting to increase by a half</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">size, with minimal burnishing, and occasionally a wee bit of reaming. I</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">found, however, that when I inserted that half size larger pin, it was way</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">too tight, and required a good bit of reaming to get down to 4 - 6 gm. <snip></FONT></P></BLOCKQUOTE><BR><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica"> Then I went back to my earlier flanges, and, lo and</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">behold, they were back to 1 - 2 gm. Bizarre, no?</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica"><snip again><BR></FONT></P></BLOCKQUOTE><BR><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Ed Foote recently noted that he was</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">pinning jacks to 6 gm or so, but they got looser soon after. Is this maybe</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">just the nature of this beast, that within fairly close parameters these</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">centers are slick enough that friction will just want to go down to 1 - 3?</FONT></P> </BLOCKQUOTE></DIV><BR><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Fred,</DIV><DIV>You mention reaming to get down to 4-6 gm. Reaming introduces heat, which, I would think, would swell the felt. As the felt cools, it would seem there would be a tendency towards lower friction.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Just a theory,</DIV><DIV>Jeff</DIV></BODY></HTML>