A linear actuator is different from an electric motor in that it applies force linearly rather than rotationally. Linear motion can be achieved in different ways and a linear actuator is one of the devices that can convert rotary motion into linear motion.

Mechanical type

A mechanical actuator converts rotary motion into linear displacement through screws / gears that are attached to a knob. One of the most famous examples of a mechanical actuator is a jack screw or car jack. The mechanical actuator is used in lasers and optics to manipulate the position of mirror mounts, linear stages, and many more positioning instruments.

Hydraulic type

An actuator or hydraulic cylinder has a hollow cylinder with a piston inside. Controlled linear piston displacement is achieved by pressurizing / depressurizing two sides of the piston. The automobile hydraulic jack is the most common example of a manually operated hydraulic actuator.

Electromechanical type

A linear electromechanical actuator is one in which a nut is the main part of the motor. The actuator lead screw does not turn and the motor turns the lead nut. It is similar to the mechanical actuator, but an electric motor is used instead of a control knob or handle.

Modern linear actuators come in different designs and each manufacture has its own proprietary methods for manufacturing actuators.

Principles of linear motion actuators

The basic operating principle of linear motion actuators is an inclined plane. The lead screw has threads, which act as a ramp and allow a small rotational force that can be used over long distances to achieve the movement of large loads in a shorter distance.

Variations in linear motion actuators

There are different variations on the basic design of linear actuators. Most of the devices have general improvements such as higher speed, efficiency or charging capacity. Today, manufacturers are also focusing more on downsizing these actuators. There is a variety of actuators available on the market, which is tailored to the specific industrial needs of buyers.

What makes linear motion actuators better compared to other motors is their higher speed, higher precision, and higher acceleration. They are used for gantry axes, general purpose position, gantry axes and assembly machines. Linear actuators are specially designed for use in harsh conditions and act as a replacement for other dangerous actuators to get the job done.

In addition to linear actuators, DC actuators are also used to perform similar applications. These work smoothly and don’t make a lot of noise. Many commercially available DC actuators are waterproof. Buyers can choose from a range of standard or custom actuators depending on their needs and budget.