The excavator Swing Bearing is a critical component in the rotation system of an excavator or a hydraulic crane. It is designed to support the weight of the upper structure of the machine and enable it to rotate smoothly around its axis. The swing bearing typically consists of an inner race, an outer race, and a set of rolling elements, such as balls or rollers. The excavator swing bearing is subjected to high loads and must be able to withstand a range of forces and stresses, such as radial, axial, and moment loads.