Screw machines, also known as automatic lathes, are specialized machines used for producing small, precise metal parts. They operate by rotating a workpiece against cutting tools to shape it into desired forms, often producing screws, bolts, and other fasteners. These machines can perform multiple operations simultaneously, increasing efficiency and reducing production time. There are two main types of screw machines: cam-operated and CNC (Computer Numerical Control). Cam-operated machines use mechanical cams to control the movement of tools, while CNC machines are computer-controlled, allowing for greater precision and flexibility in manufacturing complex parts. Both types are essential in industries like automotive and aerospace.