What are the slewing bearings used in ships and marine equipment?

In ships and marine equipment, the types of slewing bearings used must be able to adapt to harsh working conditions such as high loads, corrosion resistance, and impact resistance. The common types are as follows:

Four-point contact ball bearings:

• Can bear axial load, radial load and overturning moment simultaneously, with a compact structure.

• Suitable for scenarios with medium load and requiring flexible rotation, such as small deck cranes and helicopter deck rotating mechanisms.

Crossed roller bearings:

• Rollers are arranged crosswise at 90°, with strong load-bearing capacity, high rotation accuracy and good rigidity.

• Often used in equipment requiring high precision and rigidity, such as rotating joints of underwater robots and precision positioning auxiliary structures of ship rudder systems.

Three-row cylindrical roller bearings:

• Composed of two rows of radial rollers and one row of axial rollers, which can bear radial load, axial load and overturning moment respectively, with extremely high load-bearing capacity.

• Suitable for heavy-load scenarios, such as large marine cranes and drilling tables of offshore platforms.

These types of slewing bearings are usually designed with corrosion-resistant materials (such as stainless steel) or surface treatments (such as chrome plating and spraying anti-corrosion coatings) to resist salt spray and water vapor erosion in the marine environment.

If you need slewing bearings for marine and offshore equipment, please contact LTZC. We welcome your inquiries!