Les actionneurs linéaires en forme de U sont construits avec une base en acier extrudé.

One of the driving factors behind the widespread adoption of U-shaped actuators is that they are the only linear actuator design with dimensional interchangeability between manufacturers. It's important to note, however, that due to differing guideway and ball screw designs, technical specifications (such as load capacity, speed, or rigidity) can vary between manufacturers and product lines, even for products with the same cross-sectional size and mounting dimensions.