<html> John, I used to do it with the edge surface of a large bastard file, roll the wire on the workbench, changing the angle to randomize the marks in the wire. I believe Schaff's machinist rolls the wire on a coarse grinding wheel, but I am not sure.  The Schaff ones are usually perfect. Don At 03:57 PM 4/11/2003 -0300, you wrote: <blockquote type=cite class=cite cite>Hi Don, Would you enlighten us, on the method used to make the roughness on the broaches? Thank you. Regards, John M. Ross Windsor, Nova Scotia, Canada <a href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</a> <dl> <dd>----- Original Message ----- <dd>From: <a href="mailto:donmannino@attbi.com">Donald Mannino</a> <dd>To: <a href="mailto:pianotech@ptg.org">Pianotech</a> <dd>Sent: Friday, April 11, 2003 3:29 PM <dd>Subject: Re: Broach roughness - Was: Repinning flanges <dd>Clyde, <dd>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. <dd>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. <dd>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. <dd>Don Mannino <dd>At 06:45 AM 4/11/2003 -0400, you wrote:<blockquote type=cite class=cite cite> <dd>Friends, <dd>I discovered quite by accident at a PTG convention, when looking over tools, <dd>that the rough part of broaches can be quite different.  I have used the same <dd>set for years, and the rough part is not rough enough to "clog up."  They <dd>always worked fine for me. <dd>But I came across a set that was so rough that it looked to me like they stood <dd>a good chance of removing too much felt.  I would be afraid to use them unless <dd>someone else looked at them and said, "Oh, yes, that's the way my set is, and <dd>they work fine."  I'm not going to buy such a set just to try it out. <dd>Regards, <dd>Clyde <dd>David Love wrote: <dd>> In the process of repinning the action using broaches, I found that the <dd>> roughened part of the broach kept clogging with felt which reduced it's <dd>> cutting efficiency. <dd>_______________________________________________ <dd>pianotech list info: <a href="https://www.moypiano.com/resources/#archives" eudora="autourl">https://www.moypiano.com/resources/#archives</a> </blockquote> </dl></blockquote></html>