A machine of this type does not exist in the market, aside from an industrial robot, whose rigidity and repeatability of position affect the accuracy of machining. Indeed, by way of example, it is noted that some profiles require up to ±0.05 mm tolerance which is not easily attainable with an industrial robot.
Since the early '60s, the difficulty of polishing such complex profiles with an abrasive belt has meant that this work was done by hand by true "artisans" specialized in polishing the blades. Polish affects the finished product, not only in terms of size but also aesthetics.