Metal lathes are large machines designed for precisely machining metals and other solid materials. Bench lathes are smaller and mounted on workbenches, powered by electric motors. They are used for turning lighter workpieces. Center lathes can machine parts from metals, plastics, and composites and are used to create cylindrical shapes for engine and other components. Lathes can be manually operated or CNC machines programmed for specific tasks. CNC lathes allow for complex, high-accuracy parts production.