The material rotates over a spindle. A grinding or carving tool would make the shape since it turns. CNC Lathes are used to make symmetrical objects like spheres, cones, or cylinders. Many CNC machines are multi-perform and combine all types of cutting. The illustrations have been fairly fascinating, weren’t they? https://dmf-26035566.blogitright.com/39782169/the-ultimate-guide-to-industrial-sensors