On 30.10.12 06:15, John Thornton wrote: > I don't use a drill chuck on any of my mills, I've been told ER collets > are much better and that is what I use.
Can't disagree a lot, for milling, anyway. IIRC, it was in a Tormach document that I read a note similar to this: Drill Chucks: Using a drill chuck to hold a tool used for side cutting is dangerous, though educational and often expensive. A Jacobs taper is _not_ designed for lateral loads, so vibration and side loads generally shake the drill chuck off its mount. As the spinning mass dissipates its kinetic energy, the flailing cutting edges shred any flesh or other vulnerable material in its path. Drill chucks are only to be used with axial forces, i.e. drilling. It's now one of my MOTD entries, so once in a while my wetware RAM is refreshed. I'd hate to buy a collet for every drill size I might use. Erik -- Tote Goldfische sind praktische Lesezeichen für Bücher aus der Leihbücherei. Der wachsende Fischgeruch dient als einfache Gedächtnisstütze zur rechtzeitigen Bücherrückgabe! (Snaffled from Christian Brabandt, on Vim ML) = Dead goldfish are practical bookmarks for books from the library. The growing smell serves as a simple memory aid for timely return. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
