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.

linear actuator motion

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). There are 3 types of lead screws used in our electric linear actuators: Machine Screw, Ball Screw & Roller Screw.

The electric motors rotation drives the primary gear of the gearbox, which through single or multiple gear stages turns the gearboxes output shaft (final gear). This rotates in unison with the lead screw. When the lead screw rotates the lead nut that mates with the lead screw translates along the screw and so converts rotary motion to linear motion.

When compared to Screw Jacks the Electric Linear Actuators offer a pre-packaged actuator with full lead screw protection (fully enclosed inside ram), integrated electric motor, integrated mounting options and control feedback devices.

The Electric Linear Actuators are suitable for low to high duty applications in most industry sectors and offer a better solution than hydraulic and pneumatic actuators in most cases.

rolaram and ema linear actuators