Excavator Swing Bearing 819908687

Excavator Swing Bearing 819908687

Excavator slewing bearings (also known as turntable bearings) are key transmission components connecting the upper body and chassis. They possess high load-bearing capacity and anti-overturning properties, and their design and installation directly impact the equipment's operational stability and lifespan. They simultaneously withstand axial, radial, and overturning moments, transmitting power through the inner and outer raceways and rolling elements (balls/rollers). Mainstream structures include four-point contact ball bearings: compact for small and medium-sized excavators; crossed roller bearings: high dynamic load capacity for frequent swing conditions; and three-row cylindrical roller bearings: extra-large diameter design, specifically designed for heavy excavators with exceptional load-bearing performance. The integrated design comes standard with mounting holes, lubrication channels, and seals. Some models incorporate internal and external gears for power transmission, reducing the complexity of the mainframe.