Construction machinery is widely used in excavators, wheel loaders, forklifts, and road rollers. These machines operate in harsh environments with strong impacts, frequent start-stop cycles, and multi-directional loading, placing extremely high demands on bearing systems.

Typical Application Positions

Boom swing mechanisms, bucket transmission systems, wheel hub assemblies, hydraulic motors, gearboxes, and steering systems.

Working Conditions

• High-impact loads from rock and soil operations

• Frequent heavy-load start-stop cycles with sudden load changes

• Complex multi-directional and alternating stress conditions

• Continuous exposure to dust, mud, and vibration

• Long maintenance intervals requiring stable service life

Recommended Bearing Types

Under these conditions, bearings must balance load capacity and impact resistance:

• Tapered roller bearings: ideal for combined radial and axial loads

• Spherical roller bearings: accommodate misalignment and heavy impact loads

• Crossed roller bearings: high rigidity for slewing applications

• Four-point contact ball bearings: compact design for bidirectional axial loads

• Spherical plain bearings: suitable for oscillating and shock conditions

• Needle roller bearings: compact structure for high load, low-speed applications

• Deep groove ball bearings: general-purpose support positions

• Cylindrical roller bearings: high radial load capacity for drive and reduction systems

In construction machinery, bearings are not only required to “rotate,” but to maintain stable performance under impact and misalignment conditions.