Precision machine tool bearings, spindle bearings as the basic parts of the machine tool, its performance directly affects the speed of the machine tool, rotary accuracy, rigidity, anti-vibration cutting performance, noise, temperature rise and thermal deformation, and then affects the precision of the machining parts, surface quality and so on. Therefore, high-performance machine tools must be equipped with high-performance bearings. Especially high speed precision CNC machine tool bearings. The accuracy of rolling bearings is generally divided into P0, P6, P5, P4 and P2 five grades, for precision machine tool spindle bearing accuracy should be P5 and above, and for CNC machine tools, machining centers and other high-speed, high-precision machine tool spindle support, you need to choose P4 and its superior ultra-precision bearings.

Spindle bearings for machine tools usually include six structural types, such as deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, two-way thrust angular contact ball bearings, tapered roller bearings and thrust bearings.