CNC parts processing has a series of strict standard requirements for size and appearance to ensure the accuracy and quality of the parts.

In terms of size, CNC parts machining can achieve high dimensional accuracy. In general, the tolerance requirements can reach ±0.01mm or less, which means that the size of the machined part is very close to the size on the design drawing.

At the same time, for some specific machining, such as aperture machining, it can also achieve high precision machining, such as reaching the aperture accuracy of H7 level. These accuracy requirements ensure that the parts can be accurately matched during assembly and use to meet the performance requirements of the product.

In terms of appearance, CNC parts processing also has strict standards. First of all, the machining surface of the parts must be smooth and beautiful, and there can be no obvious scratches, flash and burrs and other defects. These defects not only affect the aesthetics of the parts, but also may affect the service performance and life of the parts.

Secondly, the surface quality of the parts also needs to meet specific requirements, such as corrosion resistance, wear resistance and hardness. These requirements ensure that the parts can resist the erosion of various external environments during use and maintain their good performance.

In addition, CNC parts processing also needs to consider some other factors, such as the performance of the machine tool, the quality of the tool and the processing environment. These factors may have an impact on the size and appearance quality of the part. Therefore, in the process of the processing, it is necessary to strictly control these factors to ensure the stability and consistency.