Electric Cylinder Actuators lift and precisely position, available in ball screw and acme screw. They are are basically worm gear screw jacks. However the screw is fully enclosed by push rod which is guided in external protection tube, that is well suited for industrial environments where protection of the lifting screw mechanism and dependable operation are critical. Meanwhile, electric actuators are widely used to replace hydraulic actuators or pneumatic cylinders with this clean alternative, and a quieter solution.