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Basic Introduction to Linear Actuators

A mechanical linear actuator is a device which produces precise straight-line movement, position & force driven usually by an electric motor.


Conversion from motorised rotary input can be achieved by using a leadscrew or ball screw for example. Generally, this involves rotating part of the mechanism to facilitate a linear movement of the screw shaft.


There are other ways of producing linear movement in a linear actuator, such as a motor driven belt attached to a carriage with accompanying guideways and bearings etc.




A typical example of an electric linear actuator is shown below.



A typical example of an electric belt driven linear actuator with carriage is shown below.