Actuators

thumb|upright=1.20|An illustration of a solenoid thumb|upright=1.20|Magnetic field created by a seven-loop solenoid (cross-sectional view) described using [[field lines]] thumb|Magnetic field demonstration with solenoid-shaped insulated wire and iron filings

An actuator is a component of a machine that produces force, torque, or displacement, when an electrical, pneumatic or hydraulic input is supplied to it in a system (called an actuating system). The effect is usually produced in a controlled way. An actuator translates a stimulus such as an input signal into the required form of mechanical energy. It is a type of transducer. In simple terms, it is a "mover".

thumb|upright|Industrial servomotorThe grey/green cylinder is the brush (electric)|brush-type [[DC motor. The black section at the bottom contains the planetary reduction gear, and the black object on top of the motor is the optical rotary encoder for position feedback. This is the steering actuator of a large robot vehicle.]] thumb|Industrial servomotors and gearboxes, with standardised flange mountings for interchangeability

electric step motor

type of linear actuator that comprises a circular gear (the pinion) engaging a linear gear (the rack)

mechanical tool for applying force

device used for lifting or lowering a load

low friction linear actuator

actuator that creates motion in a straight line

converts energy (typically in the form of compressed air) into mechanical motion

servomotor or other type of actuator used for radio control and small-scale robotics

thumb|A 2.5-ton screw jack. The jack is operated by inserting the bar (visible lower left) in the holes at the top and turning. A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses.

device used for the automation of a valve

type elektromotor

Actuator operated electrically