On 31.10.12 05:59, John Thornton wrote: > Yes, I emailed Frank at Maritool and he sent me the torque specs for the > ER collets. > > ER 11 20 ft-lbs > ER 16 35 ft-lbs > ER 25 60 ft-lbs > ER 32 90 ft-lbs
ER40 130 ft-lbs according to http://blog.cnccookbook.com/2010/09/28/getting-the-best-performance-from-er-collet-chucks/ The wrench supplied with my ER40 collet chuck is 11" long. I'm not sure I can comfortably put 140 lbs of force onto it using only one hand, so might not need a torque-wrench. Presumably the spanner length is proportional to chuck size, giving smaller chucks similar protection? Following Andy's suggestion, it's not that hard to add a torsion bar, a pointer, and then calibrate with a spring scale or the weight of 40.9 litres of water for 90 lbs at 12" radius, for ER32, for example. Erik -- Never worry about theory as long as the machinery does what it's supposed to do. - Robert A. Heinlein ------------------------------------------------------------------------------ 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
