The MD series of double- worm gearboxes are specifically designed for use in the automation field to meet application needs where two synchronous and counter-rotating outputs are required. The kinematics of the group is composed of a worm shaft and two wormwheels, which provide two counter-rotating hollow shafts at the output. The motorization of this series of gearboxes is provided by electric motors with a standardized IEC fixing flange.