fig1 toothed electromagnetic clutch 1 is comprised of field coil 2 rotor 3 and armature drive 4 rotor 3 is connected to a rotating shaft of an electric motor as shown in fig1 field coil 2 is comprised of baseboard 5 coil 6 housing 7 and bushing 8 housing 7 accommodates coil 6 which is ring shaped baseboard 5 allows field coil 2 to be attached to an external frame or device and bushing 8 connects field coil 2 to rotor 3 so as to allow relative rotation between field coil 2 and rotor 3 as shown in fig1 and 4 rotor 3 is comprised of cylindrical rotor ring 9 shaft 10 support shaft 11 snap ring 12 and rectangular coupler 17 cylindrical rotor ring 9 extends over the outer periphery of housing 7 which is part of field coil assembly 2 with a specified clearance additionally cylindrical rotor ring 9 includes rectangular aperture 16 by which it is fixedly attached to a rectangular portion of shaft 10 shaft 10 extends through bushing 8 a cylindrical portion of shaft 10 and bushing 8 form a bearing that allows shaft 10 to be rotatably supported by field coil 2 shaft 10 is fixed in the axial direction by the snap ring 12 support shaft 11 which extends into armature drive 4 is press fit into one side of shaft 10 rectangular coupler 17 is formed on the other side of shaft 10 a rotating shaft not shown of a motor or similar device connects to shaft 10 through the use of rectangular coupler 17 accordingly rotor ring 9 shaft 10 and support shaft 11 rotate.