The primary function of the slewing bearing is to enable the continuous, smooth, and controlled 360-degree rotation of the excavator's upper structure. This includes the cab, engine, counterweight, and the entire attachment (boom, arm, and bucket).
Load Support: It supports immense combined loads from the upper structure, including:
Axial Loads: Vertical loads from the weight of the upper structure and the force of digging.
Radial Loads: Horizontal loads caused by operating on slopes or uneven ground.
Moment Loads: Tilting or overturning forces generated during digging and lifting heavy objects.
Power Transmission: It acts as the gear race for the swing pinion. The hydraulic swing motor engages with the internal or external gear teeth of the slewing ring to drive the rotation.
Pivotal Point: It serves as the central pivot point for all digging, lifting, and swinging operations, making it fundamental to the machine's productivity and stability.
This 198-0856 slewing bearing is used for 305 304 excavator.
Related part number:
140-4986
163-9969
198-0856
225-5850
8T-4223
8T-6868
