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China Construction Machinery Parts Supplier | CNFORCE What exactly is XE2000 slewing bearing 800555455? A slewing bearing is a kind of large-scale rolling bearing, which is helpful to the smooth rotation between the upper structure (house) and chassis of excavator. The XCMG XE2000 Slewing Bearing (Part Number: 800555455) is a precision-engineered component specifically designed for the massive XCMG XE2000 mining excavator. It is the key interface to transfer the axial, radial and moment loads from the boom and arm of the excavator to the chassis system, and realize 360-degree continuous rotation at the same time. Its operation is intrinsically related to the drive system of the machine. The hydraulic motor of the excavator provides power, and then the power is transferred and converted into rotating force. This is where the efficiency of the planetary system of the related gearbox becomes crucial. A high-efficiency planetary gearbox reducer ensures that maximum torque is delivered to the bearing’s gear ring with minimal energy loss, allowing for smooth and powerful slewing motion even under full load. The bearing itself has a double-row and self-aligning roller structure, which is key to its high bearing capacity and ability to compensate for tiny deviation.