The Use of SKF Bearings in Crane Machinery
Writer: Eric Bearing Limited
Bearings are critical components in crane machinery, enabling smooth rotation, reducing friction, and supporting heavy loads. Cranes—whether tower cranes, mobile cranes, or overhead cranes—rely on high-performance bearings to ensure stability, precision, and durability under extreme conditions.
(a) Slewing Rings (Slewing Bearings)
Used in the crane’s rotating upper structure (slewing platform).
Handle axial, radial, and moment loads simultaneously.
Common in tower cranes, crawler cranes, and excavators.
(b) Hook Block Bearings
Support the pulley system in the hook block.
Must withstand high radial loads from lifting operations.
Often sealed SKF or lubricated for heavy-duty use.
(c) Boom and Jib Bearings
Allow smooth extension and retraction of telescopic booms.
Must resist shock loads and misalignment.
Commonly SKF spherical roller bearings or tapered roller bearings.
(d) Travel Mechanism Bearings
Used in wheels and tracks of mobile cranes.
Handle high radial loads and vibrations.
Typically SKF deep groove ball bearings or cylindrical roller bearings.
(e) Cab Rotation Bearings
Enable 360° rotation of the operator’s cabin.
Require low friction and high precision.
Often four-point contact ball bearings.
Challenges & Solutions
(a) Heavy Loads & Fatigue
Solution: Use high-strength steel bearings with reinforced cages.
(b) Harsh Environments (Dust, Moisture, Corrosion)
Solution: Sealed or shielded bearings with corrosion-resistant coatings.
(c) Misalignment & Shock Loads
Solution: Self-aligning bearings (spherical roller bearings) compensate for misalignment.
(d) Maintenance & Lubrication
Solution: Automatic lubrication systems or maintenance-free bearings for long service life.
SKF Bearings are vital for crane performance, ensuring smooth operation, load stability, and longevity. The correct selection—based on load type, environmental conditions, and movement requirements—directly impacts safety and efficiency. Advanced bearing technologies, such as sealed, self-lubricating, and high-strength designs, continue to enhance crane reliability in demanding applications.
