Ball Screws

A ball screw is a mechanical device that translates rotational motion (spinning) into linear motion (moving in a straight line) with high precision and very little friction.
Here is the simple breakdown of what it does:
• Like a Nut and Bolt: It functions exactly like turning a nut on a long threaded rod, but instead of the nut rubbing against the threads, it rolls.
• Uses Balls to Roll: Inside the nut (called a "ball nut"), tiny steel balls circulate inside the threads. When the screw or the nut spins, the balls act as a rolling interface.
• Highly Efficient & Precise: Because it uses rolling balls instead of sliding friction, it moves very smoothly and can position heavy objects with extreme accuracy. It also requires less motor power to move things.
• Found in Robotics: This high precision makes ball screws vital components in CNC machines, robotics, 3D printers, and aircraft flight controls.
In short, a ball screw is a highly accurate device that uses rolling metal balls to efficiently convert spinning power into perfectly straight movement.