As in motor drive couplings like the one made by MagnaDrive? http://www.magnadrive.com/ I too am interested in some theory behind these devices. I'd also appreciate any reference links which might be available. Lyle Killough > -----Original Message----- > > Has anymore got any good web references to anything related to eddy currents > and rotating disks. Google has many strikes but there may be some gems it > doesn't know about. > > Russell McMahon -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body