Three-Row Cylindrical Roller Slewing Bearings
Slewing ring bearing with triple rows of rollers
Three-row cylindrical roller slewing bearings is built for applications requiring exceptional load-handling capabilities. With three rows of rollers, this bearing design ensures that the load is distributed across different rows, each dedicated to managing specific force such as axial loads, radial loads, and overturning moments. This configuration provides superior rigidity and stability during rotation, making it highly effective for heavy-duty and complex load scenarios. However, due to its design, it requires precise installation and is more sensitive to any deformations in the mounting structure.
These bearings are typically manufactured using 42CrMo4 steel with induction-hardened raceways to maximize durability. However, depending on the application and customer needs, other materials can be selected to suit specific operational environments.
ZZ has advanced capabilities in producing Three-row cylindrical roller slewing bearings, tailored to meet demanding industrial requirements. We can manufacture integrated structure bearings with a maximum outer diameter of 12 meters, while for split structures, the maximum outer diameter reaches up to 20 meters.
The gear module size can go up to 45mm, accommodating a wide range of design needs.
(We offer customization options to create non-standard products based on specific user requirements)
Our three-row cylindrical roller slewing bearings are designed to be versatile, available in three distinct configurations: external gear, internal gear, and gearless designs. Each option is built with a robust structure that includes inner and outer rings, rollers, spacers (bearing cages), and seals. To further enhance durability, especially in challenging environments, we offer additional dust-proofing features like dust covers or ash shields based on specific application requirements.
This design features gear teeth on the outer ring. Due to the external location of the gear mesh, this configuration generally requires more installation space compared to internal gear designs. It is ideal for applications where external gear interaction is necessary and where space constraints are not a primary concern.
In this configuration, the gear teeth are located on the inner ring, allowing the gear mesh to occur inside the bearing. This design is more space-efficient than the external gear option, making it suitable for applications where installation space is limited.
This gearless design features smooth inner and outer rings with no gear teeth, making it suitable for applications where gear interaction is not needed. This simple design offers ease of maintenance and can be used in systems where simplicity and reliability are key.
In July 2024, we successfully manufactured a super-large split slewing bearing with a diameter of 18 meters, a weight of 168 tons, and a height equivalent to about six stories. This large bearing, designed and manufactured by ourselves, will be installed on a giant floating crane for the installation of offshore wind turbines.
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 offshore crane
Slewing bearing used in floating crane
Slewing bearing used in ladle rotary table
Slewing bearing used in crawler excavator
The roller/ball combined slewing bearing integrates both rollers and balls within its structure, providing a balanced approach to load management.
Cross cylindrical roller slewing bearings are designed for applications that demand high rigidity and precise load handling.
The four-point contact ball slewing bearing is designed with rolling elements and raceway for point contact. With compact structure and flexible rotation, the slewing bearing not only can simultaneously withstand axial load, radial load, overturning moment, but also can withstand a single direction load.
The double-row ball slewing bearing features a design with two rows of balls, where the rolling elements make point contact with the raceways.
Specialists in bearings for wind turbines, marine equipment, and tunneling machines. We deliver quality, expertise, and reliable service.
