XSU series robot special cross roller bearing, the inner and outer rings are of integral structure, with high rigidity, and are integrated with the mounting hole and bearing flange, which is convenient for structural design and use, greatly simplifies the installation process, and does not affect the installation accuracy, with high accuracy and high torque rotation, but also can freely choose the accuracy requirements that meet, and can have a greater choice to use the inner ring or outer ring rotation type. It is different from HRU in adopting double-sided elastic reed sealing structure. Its size is smaller than HRU series and more suitable for installation in a relatively small installation space.