IMC Hansen 148-1-18 Electric Clock Motor Hansen Z148-1-18 electric clock motor, 12 volts, 2-3/8"(H) (60.3 mm) 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 148-1-18, DC VOLTS:12, SPEED: 2 1/2 RPM.