The use of rolling bearings on machine tools is mainly used in the following three parts: main shaft, ball screw and general drive shaft.

As a basic accessory of a machine tool, the performance of the spindle bearing directly affects the speed, rotation accuracy, rigidity, anti-vibration cutting performance, noise, temperature rise and thermal deformation of the machine tool, and then affects the accuracy and surface quality of the machined parts. Therefore, high-performance machine tools must be equipped with high-performance bearings. Spindle bearings for machine tools usually include six structural types: deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, bidirectional thrust angular contact ball bearings, tapered roller bearings and thrust bearings.

With the rapid development of CNC technology, "composite, high speed, intelligence, precision, and environmental protection" has become the main trend in the development of today's machine tool industry technology. Among them, high-speed machining can effectively improve the machining efficiency of the machine tool and shorten the machining cycle of the workpiece. This requires the machine tool spindle and its related parts to adapt to the needs of high-speed machining. At present, the spindle bearings of CNC machine tools are basically limited to four structural types: angular contact ball bearings, cylindrical roller bearings, bidirectional thrust angular contact ball bearings and tapered roller bearings.

The machine tool industry is of strategic importance both economically and technologically. Its outstanding equipment design capability and manufacturing process level based on mechanical engineering technology and digital control technology make it at the forefront of the fourth industrial revolution. As digitalization becomes a core driving force, exciting opportunities for further automation have emerged. The key goal of optimizing overall equipment effectiveness (OEE), centered on reliable performance and sustainability, is more important than ever.