Mechanical and electromechanical products that generate or position linear movement, including electric cylinders, linear actuators, lifting columns, powered axes and tables, screw jacks, ball-screw and lead-screw drives, linear-chain actuators and associated mounting components. Includes actuator assemblies with integrated controls. Passive guides belong with bearings and linear guides; hydraulic and pneumatic working cylinders belong with fluid-power equipment; dedicated valve and damper actuators belong with valves.