such results is illustrated schematically at fig9 11 a dc electric motor 10 39 is provided with a stator 14 which may have a structure as illustrated at fig2 the stator 14 has end magnet rings 22 and 24 an arrangement such as the illustrated annular groove 120 at each end face of the stator 14 and a corresponding projecting annular portion 122 in the corresponding face of the magnet rings 22 and 24 providing axial alignment between the stator and the rings and preventing radial displacement therebetween end caps 124 and 126 form return paths for the magnetic flux and are provided with appropriate bearings 128 through each of which is journalled an end of the shaft 34 supporting the rotor 30 in the form of a laminated armature provided with adequate windings not shown the stator 14 and the end caps 124 and 126 are held in assembly and in alignment by means of for example a pair of laterally disposed tie rods 129 passed through aligned apertures in projecting lugs 130 attached to or made integral with each of the end caps 124 and 126 the tie rods 129 are each threaded at both ends a pair of nuts 132 and 134 interconnecting each tie rod 129 to the corresponding lug 130 of the end caps 124 and 126 the magnet rings 22 and 24 are affixed to their corresponding end cap 124 and 126 by appropriate means not shown.