A twin lead screw, also known as a double lead screw, is a threaded rod used in various machinery applications to convert rotary motion into linear motion. It is essentially two screws placed in parallel with each other, connected by a common shaft. The screw threads on each of the screws mesh with each other, allowing the screws to move in opposite directions. This screw is suitable for use in situations where precision is crucial. and stability is required, such as in CNC machines, printers, and robots. In this article, we will discuss the working of twin lead screws and the benefits they offer.