The correct configuration of the spindle bearing refers to the combination of bearing type and the layout of the front and rear bearings. The different configuration lead to the different load capacity, speed, stiffness, temperature rise and service life of the machine tool spindle, especially effect on the stiffness and temperature rise, so users should carry out configuration of the spindle bearing properly according to the requirements of the working characteristics of the machine tool. Spindle bearing is used for precision machine tool and similar equipment. It ensures the accuracy and performance of precision machine tools.