Cross Cylindrical Roller Slewing Bearings
Slewing ring bearing with crosswise arrangement of cylindrical rollers
Cross cylindrical roller slewing bearings are designed for applications that demand high rigidity and precise load handling. In this design, cylindrical rollers are arranged crosswise, allowing them to make line contact with the raceways. This structure provides excellent stability and the ability to manage multiple loads simultaneously, including axial loads, radial loads, and overturning moments. Due to this configuration, the bearing is highly capable of absorbing impact loads and maintaining a stable rotation, even under challenging conditions. While these bearings offer a high dynamic load capacity, the cross arrangement also results in greater frictional resistance during operation, which can limit the rotational speed. Additionally, the small internal clearance makes the bearing sensitive to deformations in the mounting structure, requiring careful installation.
These bearings are generally manufactured using 42CrMo4 steel, with the raceways hardened through an induction process to ensure durability. However, depending on the application, alternative materials can be selected to meet specific operational needs.
ZZ can produce cross cylindrical roller slewing bearings with an outer diameter of up to 20 meters. The gear module size can go up to 45mm.
Cross cylindrical roller slewing bearings are available in three distinct configurations to accommodate various application needs: external gear, internal gear, and gearless designs. Each configuration consists of essential components such as inner and outer rings, cylindrical rollers, spacers (as needed), and seals. Depending on the specific operational environment, additional dust-proofing features, like dust covers or ash shields, can be added to enhance the bearing's durability and performance.
This design features gear teeth on the outer ring, making it suitable for applications where the gear mesh occurs externally. Due to the external positioning of the gear, this configuration generally requires more installation space compared to an internal gear design.
In this configuration, the gear teeth are located on the inner ring, allowing the gear mesh to occur within the bearing. This setup is more space-efficient, requiring less installation space compared to the external gear design, making it ideal for applications with limited space.
This gearless design features smooth inner and outer rings without any gear teeth, making it suitable for applications where gear interaction is unnecessary.
Our products are widely utilized in wind turbines, marine equipment, tunnel boring machines, and construction machinery. Notably, our wind turbine products are well-known in the market, where we are recognized for offering turnkey solutions that cater to the unique needs of our clients.
Slewing bearing used in construction machinery
Slewing bearing used in stacker reclaimer
The four-point contact ball slewing bearing is designed with rolling elements and raceway for point contact.
The double-row ball slewing bearing features a design with two rows of balls, where the rolling elements make point contact with the raceways.
Three-row cylindrical roller slewing bearings is built for applications requiring exceptional load-handling capabilities.
The roller/ball combined slewing bearing integrates both rollers and balls within its structure, providing a balanced approach to load management.
Specialists in bearings for wind turbines, marine equipment, and tunneling machines. We deliver quality, expertise, and reliable service.
