Linear Actuators create motion in a straight line, as contrasted with the circular motion of a conventional electric motor. Linear actuators are used in machine tools and industrial machinery, computer peripherals such as disk drives and printers, valves and dampers, and many other places where linear motion is required. Hydraulic Cylinders or Pneumatic Cylinders inherently produce linear motion; many different mechanisms are used to provide a linear movement from a rotating motor.
Mechanical linear actuators typically operate by conversion of rotary motion into linear motion. Modification is commonly made via a few simple mechanisms: Leadscrew, screw jack, ball screw and roller screw actuators all operate on the principle of the simple machine known as the screw. By rotating the actuator's nut, the screw shaft moves in a line.
