Linear Actuator

A linear actuator is an actuator that creates motion in a straight line, in contrast to the circular motion of a conventional electric motor. Linear actuators are used in machine tools and industrial machinery, in computer peripherals such as disk drives and printers, in valves and dampers, and in many other places where linear motion is required. Hydraulic or pneumatic cylinders inherently produce linear motion. Many other mechanisms are used to generate linear motion from a rotating motor.

A linear motor is functionally the same as a rotary electric motor with the rotor and stator circular magnetic field components laid out in a straight line. Where a rotary motor would spin around and re-use the same magnetic pole faces again, the magnetic field structures of a linear motor are physically repeated across the length of the actuator.

Since the motor moves in a linear fashion, no lead screw is needed to convert rotary motion to linear. While high capacity is possible, the material and/or motor limitations on most designs are surpassed relatively quickly due to a reliance solely on magnetic attraction and repulsion forces. Most linear motors have a low load capacity compared to other types of linear actuators.

Linear motors have an advantage in outdoor or dirty environments in that the two halves do not need to contact each other, and so the electromagnetic drive coils can be waterproofed and sealed against moisture and corrosion, allowing for a very long service life.

LINEAR ACTUATOR SELECTION GUIDE

DETERMINE THE FOLLOWING LINEAR ACTUATOR REQUIREMENTS

Capacity 

The weight or force required to move and hold the load

Voltage   

The AC or DC motor voltage needed to operate the actuator

Travel      

The distance or range of motion

Speed      

The rate at which the linear actuator moves the load

Duty Cycle

Percentage of time an actuator is in motion relative to total time

Orientation

The relative position or direction in which the force is applied

Environment

The surrounding conditions in which the system will operate

We are selling the following linear actuator 

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