Selecting a reliable parts processing factory requires multi-dimensional evaluation, including equipment capabilities, process technology, quality system, service response, etc. The following are specific criteria and recommended directions:

Equipment and technical capabilities

Preferably choose manufacturers equipped with CNC machining centers (three to five axes), turning and milling machines, precision grinding machines, and other high-precision equipment. Such equipment can ensure processing accuracy, for example, the equipment can achieve complex surface processing and avoid repeated positioning errors. At the same time, it is necessary to examine the manufacturer's ability to optimize processes for difficult-to-process materials (such as titanium alloy and tungsten steel), as well as their experience in providing customized services in fields such as medical and semiconductor industries. 

Quality management system

The manufacturer is required to have ISO 9001 certification, and the focus is on inspecting the traceability of raw material batches, process flow records, and non-conforming product handling mechanisms (such as the establishment of isolation areas). It is recommended to conduct on-site inspections of the factory, examine testing equipment (such as coordinate measuring machines), and review the quality control process