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Home / News / Industry News / The relationship between the stroke and load of linear actuators

The relationship between the stroke and load of linear actuators

2024.09.24

There is a complex interaction between the stroke and load of linear actuators. The two are not just independent parameters, but closely related factors in design, selection and actual application. In engineering applications, choosing the right stroke range and load capacity can ensure the performance, accuracy and life of the actuator.
The impact of long stroke on load
As the stroke of the linear actuator increases, the system's requirements for structural strength and mechanical stiffness will also increase. The longer the stroke, the more obvious the cantilever effect of the actuator. The cantilever effect refers to the degree of bending and lateral force generated when the piston rod or drive rod of the actuator is subjected to load under a long stroke. This force not only imposes additional stress on the mechanical components inside the actuator (such as screws, ball screws, etc.), but also reduces the stability of the entire structure.
The impact of load on stroke
The load capacity of the actuator directly affects its stroke range. Heavier loads may cause more mechanical stress and deformation in the actuator under long strokes, so it is necessary to choose a suitable combination of stroke length and load capacity. For electric linear actuators, the longer the stroke, the greater the torque and shear force that the actuator screw, gears and motor need to withstand. This stress may cause the system to overload or require the drive motor to increase power to compensate for the load.
In this case, the designer must weigh the actuator stroke against its load capacity. For example, for some applications, such as linear motion of heavy materials in industrial equipment, the larger load requirements will limit the maximum available stroke length. Usually, the manufacturer will clearly provide the maximum load capacity at different strokes according to the product specification table as a reference for user selection.

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