Synchron Z146RC Electric Clock Motor Hansen Z146RC-5-6 electric clock motor, 24 volts, 60 cycle, 60.3 mm (2-3/8") (H) x 47.6 mm (1-7/8") (W) x 34.9 mm (1-3/8") (D). Overall shaft length 12.7 mm (1/2"), post measures 4.8 mm (3/16") in diameter, 1 side is flat. 2 holes for mounting. The motor is marked 640 24V 60HZ 5W 1 RPM Z146RC-5-6 9026.