Screw drivetrains are the most common type of electromechanical linear actuators currently in use. A screw drivetrain acts as a linear force generation system, converting a rotary torque input from a motor into linear thrust and motion. Since electromechanical actuators are also used for linear positioning, they must be able to ensure accurate and repeatable levels of linear motion, while still being capable of providing the required force for the application. A screw mechanism produces linear motion by rotating either a nut or, more typically, a screw in an assembly to generate motion.

Each of the three major screw drivetrain types – ball, roller, and ACME/trapezoidal – has its own advantages and disadvantages. This white paper offers a high-level overview of these three
screw drivetrain technologies so that you can make sure that you’re getting the most out of your systems.