The material rotates over a spindle. A grinding or carving tool would make the shape since it turns. CNC Lathes are used to generate symmetrical objects like spheres, cones, or cylinders. Lots of CNC machines are multi-functionality and combine all types of cutting. Milling CNC machines can be found in https://fernandowtrni.blogs-service.com/69654600/the-2-minute-rule-for-steel-hardening