Well, that's embarrassing, I changed the insert for a new one and the part came out fine. I guess the lesson here is that you can get away with allot more when machining aluminum. I wonder if making a Delrin part could be used as a means for optimizing machining aluminum. BTW, the tool I am using looks just like this:
http://littlemachineshop.com/products/product_view.php?ProductID=1669 with an included circle of .250 and points only on the top. This one looks it might be better: http://www.pgstools.com/servlet/the-16356/TCGT-21.52-dsh-AK-Insert-for/Detail ... I think this is the winner: http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=8095371&PMT4NO=45689204 Darn, not in stock. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users