Another reason is collet holders are much shorter than a drill chuck and on Z challenged machines like my BP switching between an end mill holder an a drill chuck is not always a practical thing... but at $200 for a set of collets it will be out of the range of many home shop machinists. I do have a jacobs chuck for my BP but don't use it.
John On 10/30/2012 7:31 AM, Erik Christiansen wrote: > 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 > ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
