Robust Design and Construction:
The 329D's slewing bearing is a large-diameter, single-row ball bearing design. It is engineered with high-strength, hardened steel to withstand immense axial, radial, and moment (tilting) loads generated during digging, lifting, and swinging operations.
Integrated Gear Ring:
The bearing features an internally or externally integrated gear ring. This gear meshes directly with the drive pinion of the excavator's swing motor and reduction gear, efficiently transferring torque to rotate the upper structure smoothly and powerfully.
This 199-4478 slewing bearing is used for 325D 329D 329D2 330D2 excavator.
Related part number:
227-6073
3B-8489
