Abstract: Synchronous motor has molded coil spool enclosed in telescoping metal field cups which have interdigitating teeth forming pole pieces around the central opening in the spool. A closed end of the spool has a bearing for one end of a shaft carrying a permanent magnet rotor; a molded face plate closes the other end of the opening and has a bearing for the other end of the shaft. The face plate has interfitting elements which locate it accurately with respect to the spool and cups on one side, and with respect to a head plate on the opposite side, assembly being facilitated by chamfered openings. The face plate and the head plate have bearings for the arbors of a train of reduction gears driven from a pinion on the rotor shaft. A single spring clip embracing the spool, cups and face plate engages the head plate and holds all the mentioned parts in assembled relation thereto. Assembly and disassembly can be done without tools.