On Sat, 2009-05-09 at 17:10 -0400, Douglas Pollard wrote: > Kirk Wallace wrote: > > On Sat, 2009-05-09 at 15:07 -0400, John Kasunich wrote: ... snip > It has been my understanding that the number eight cutter will cut a > gear with 12 and 13 teeth. If you get below 12 teeth there has to be > undercutting for the teeth to run right without chafing against each > other.
The problem is you can't cut the base of the tooth where the required path narrows the base, which is a problem if your setup requires you to keep the cutter's center radial plane in line with the gear axis. > I would think that a 10 tooth gear would need to be generated > with a hob or a gear shaper. There was some information on the South > Bend lathe list where a fellow claimed that a perfect generated tooth > for can be cut by useing a tap running on the perifery of a gear blank > and feeding across the face. The blank is left to freewheel and be > pulled around by the tap. He claims it makes a perfect tooth??? > Doug Well the tap has a trapezoidal shape, just like a hob cutter. After a couple of turns of the gear, the tap and gear might self synchronize, like a knurling tool does. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
