The Rotor Positioner is a gear box which allows the rotor of a 2 kW machine to accurately lock in any given position. The rotator is mounted on a steel support that is connected to the carriage of the 2 kW machine. The coupling between the machine shaft and the rotor positioner is accomplished by the Coupler, Model 8943. The zero indicator can be adjusted to any position by turning the slip-fit coarse and fine dials.