A linear actuator is a device that moves between two points in a linear motion. Linear actuators are available based on a variety of technologies including: Mechanical, Electro-Mechanical, Direct Electric (Linear Motors), Hydraulic & Pneumatic.

All of Power Jacks linear actuators are either mechanical or electro-mechanical. Electro-Mechanical Linear actuators are also known as Electric Linear Actuators due to the primary drive being an electric motor.

Electric Linear Actuators (ELA) convert the rotary motion of the electric motor to linear motion by means of two main components a gearbox (rotary motion) and a lead screw (linear motion).