Crossed Roller Bearing is a high-precision, high-rigidity compact rotary bearing specially designed for multi-directional load operation. Cylindrical rollers are arranged alternately at 90 degrees between inner and outer raceways. A single bearing unit can simultaneously bear radial load, axial load and overturning moment, replacing the traditional combination of multiple bearings. It features ultra-thin cross-section, zero clearance rotation, high positioning accuracy and stable running performance, widely adopted in precision automation, CNC machinery, industrial robot joints and semiconductor equipment.