De praktijk heeft aangetoond dat de keuze voor een redelijke snijhoeveelheid verband houdt met verschillende factoren, zoals werktuigmachine, gereedschap, werkstuk en proces. De methode om het verwerkingsbedrag redelijk te selecteren is als volgt:
①In rough machining, it is mainly to ensure high production efficiency, so a larger amount of back-feeding should be selected, and a medium-low cutting speed should be selected for the cutting speed U.
②When finishing, it is mainly to ensure the size and surface accuracy of the parts, so choose a smaller amount of back cutting, smaller feed, and higher cutting speed.
③ When roughing, it is generally necessary to give full play to the potential of the machine tool and the cutting ability of the tool. When the CNC lathe factory is semi-finishing and finishing, it should focus on how to ensure the processing quality, and on this basis, try to improve the productivity. When choosing the cutting amount, the CNC lathe factory should ensure that the tool can process a part or ensure that the durability of the tool is not less than one work shift, and at least not less than half a work shift. The specific value of the CNC lathe factory should be selected according to the provisions in the machine tool manual, tool durability and practical experience.