The material rotates with a spindle. A grinding or carving tool would make the shape as it turns. CNC Lathes are used to help make symmetrical objects like spheres, cones, or cylinders. Many CNC machines are multi-purpose and Mix every type of cutting. At times, there may be technical confusion https://usedmachiningcenters79011.csublogs.com/46195955/sheet-metal-forming-for-dummies