YRT rotary bearing is composed of a thrust/radial seat ring, a thrust/radial shaft ring, a thrust washer ,two needle roller cage assemblies and a group composed of concentric cylindrical roller. Seat ring and shaft installation ring with uniformly distributed holes with screws. This type of bearings with high axial and radial load capacity. High tilt stiffness and high accuracy. Applies to rotary table, chuck and iron cutter head, as well as measurement and experiment bearing configuration. This type of bearing right with the equipment to match the requirements of parts is higher. Required to control the installation of the installation of the screw tightening torque.