YRT bearing consist of a thrust/radial housing washer, a thrust/radial shaft washer, a thrust washer, two Axial needle roller and cage assemblies and a group of radial cylindrical roller . Housing washer and shaft washer have bolt hole for install equally spacer. This kind of bearings have high axial load and radial load , and high tilting rigidity and high precision. This bearing can be used to the machine tool or other high precision machinery of the rotary table or sub-set, and also can be used for chuck, measuring instruments and test equipment ,and rotary table configuration. This bearing request higher quality of the parts match lt.  You must control screw tightening torque when install it.