General term for pneumatic actuators that generate linear or rotary motion using compressed air as a power source. Core components in manufacturing line automation that handle workpiece transport, positioning, clamping, pressing, lifting and other operations. Available in various configurations including single-acting/double-acting, rod type/rodless type, standard cylinder/compact cylinder with selection based on stroke length, bore diameter, and mounting method according to application requirements. Forms pneumatic systems when combined with pneumatic valves, regulators, fittings and other components, offering superior high-speed operation, high thrust force, and maintainability compared to electric actuators.