With the development of modern machine tool industry, a turntable with the YRT three rows of high precision cylindrical roller bearings in the market demand is growing. This process is difficult bearing high technological content, for the exclusive monopoly of some foreign companies. Luoyang Bearing Science & Technology Co., Ltd. in the machine (LZK) in this regard a number of technology research, has developed a YRT120, YRT150, YRT325 so, has successfully developed YRT650 bearings, bearing various technical indicators have reached the foreign company INA request, once again demonstrated the strong technical strength LZK. No content