Profile: Power Jacks Ltd. specializes in offering precision linear actuation, power transmission and mechanical jacking. Our products include screw jacks, electric linear actuators, bevel gearboxes, and planetary roller screws. Our classic E-series screw jacks feature precision worm gear set, powerful lead screw, robust housing, and two integrated lubrication mechanisms. The roller screw jacks are suited to very high loads. The construction of these units is available in standard materials, or corrosion resistant, such as complete stainless steel jacks.