The ZKLDF-B thrust angular contact ball series has extremely high rotation speed, extremely low friction torque, and can also withstand combined loads. It is suitable for high-speed rotary tables in turning and milling machining centers, vertical grinders, measurement and control fields, etc. YRTGM series with integrated angle measurement system, through the modular design of the integrated angle measurement system, realizes the integration of precise rotation and precise angle control of the turntable, simplifies the axis system structure, and is suitable for CNC rotary tables and indexing tables of machining centers. In other cases, the angle measurement accuracy can reach ±1 arc second.