Apparatus and methods for use of synchronized plural epicyclical transmissions to stabilize and to drive an output gear of a machine capable of bending tubing, conduit, and pipe requiring high torque, as well as swaging, cutting, and threading. One embodiment of the apparatus includes multiple transmissions encircling and engaged with a centrally mounted motor. Another embodiment of the apparatus includes multiple transmissions, each engaged with a mounted motor. Transmissions can be equidistantly spaced around the perimeter of an output gear.