Based on the production needs, our company has introduced two new high-precision grinding machines, namely high-precision cylindrical CNC grinding machine and high-precision inner CNC grinding machine. These two devices are processed automatically by the frame manipulator, and their repeated clamping positioning and processing accuracy are 0.003mm, the consistency of mass production is high. These two devices mainly used for grinding the inner and outer diameters of our backup roller products and ball cage coupling products. The stability and efficiency of the new equipment expand the production capacity of our two type products and improve the quality stability of these two type products.