Industrial robot bearings mainly include thin-walled bearings, crossed cylindrical roller bearings, harmonic reducer bearings and joint bearings, but mainly cross-roller bearings.Cross-roller bearing structure in welding robot joints: Cylindrical rollers are vertically arranged in the inner and outer raceways of the bearing, and a single bearing can simultaneously bear the common load of radial force, bidirectional axial force and overturning moment.The bearing has large bearing capacity, good rigidity, high rotation precision, easy installation, space saving, weight reduction, significant friction reduction, and good rotation precision.