A ball screw is a mechanical device that converts rotational motion into linear motion. It consists of a screw shaft and a nut that contains ball bearings. As the screw rotates, the ball bearings roll between the screw and nut, allowing for smooth and efficient movement with minimal friction. Ball screws are commonly used in various applications, including CNC machines, robotics, and automated systems. They are favored for their high precision and load-carrying capacity, making them ideal for tasks that require accurate positioning and movement.