A lead screw is a type of mechanical component used to convert rotational motion into linear motion. It consists of a threaded shaft and a nut that moves along the threads when the shaft is rotated. Lead screws are commonly found in applications like 3D printers, CNC machines, and linear actuators. These screws are designed for precise movement and can handle heavy loads, making them ideal for various engineering tasks. They are often made from materials like steel or plastic, and their efficiency can be influenced by factors such as thread pitch and lubrication.