Standard Ball Screw Jacks are available in two types: translating screw and rotating screw, each available with either upright or inverted screw. In the translating screw type, the ball nut is fixed to a rotating wormgear within the housing, and the lifting screw moves up and down through the nut. In the rotating screw type, the screw is fixed to the rotating wormgear, and the ball nut travels up and down the screw. Both types of ball screw jacks, and their variations, are available in capacities from1 tons to 35 tons. Ball screw jacks may be used individually, in tandem or in multiple arrangements, connected by shafting, couplings and miter gear boxes. Special models are also available. Single end worm shafts with left or right hand extensions are furnished at no extra charge.