Double-Row Ball Slewing Bearings Manufacturer

Double-Row Ball Slewing Bearings

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Slewing ring bearing with two rows of balls

The double-row ball slewing bearing features a design with two rows of balls, where the rolling elements make point contact with the raceways. Each row of steel balls is responsible for bearing loads in the upper and lower directions, respectively. This configuration offers several advantages, including greater tolerance to installation inaccuracies and deformation of the mounting structure, making it a reliable choice even in challenging environments. The double-row design also enhances load distribution, improving overall stability and performance.

Typically, these bearings are made from 42CrMo4 steel with induction-hardened raceways, ensuring durability and long service life. However, materials can be customized based on specific application requirements and customer preferences.

Manufacturing Capability

At LYXQL, we have advanced manufacturing capabilities for producing Double-Row Ball Slewing Bearings. Currently, we can process bearings with a maximum outer diameter of 12 meters for integrated structures.

Additionally, we can handle a wide range of gear module sizes, with maximum module 45 and minimum module 4.

(We are capable of customizing non-standard products based on specific customer requirements.)

Options of Slewing Bearings

Double-row ball slewing bearings are available in three configurations: external gear, internal gear, and gearless designs. Each type includes essential components like inner and outer rings, steel balls, spacers (bearing cages), and seals. Depending on the application, additional protective features such as dust covers or ash shields can be added to enhance durability and performance, ensuring that the bearing meets the specific needs of your project.

Slewing ring with external gear

Features gear teeth on the outer ring, making it ideal for applications where the gear mesh occurs externally. Due to the external positioning of the gear teeth, this design typically requires more installation space compared to an internal gear design, as the gears interact outside of the bearing structure. This configuration is well-suited for machinery where space constraints are less of a concern, and where the external gear arrangement can provide effective load distribution and ease of maintenance.

Slewing ring with internal gear

Has gear teeth located on the inner ring, allowing the gear mesh to occur inside the bearing. This internal configuration typically requires less installation space compared to an external gear design, making it a more space-efficient option.

Slewing ring without gear

Features smooth inner and outer rings with no gear teeth. This gearless design is typically used in applications where there is no need for gear interaction, offering a simpler and more straightforward solution. It provides flexibility in design and can be an ideal choice for systems where the absence of gears helps to simplify the structure and reduce maintenance requirements.

Slewing bearing used in mobile crane

Slewing bearing used in onshore crane

Slewing bearing used in marine deck crane

What is a Double-Row Ball Slewing Bearing?

This type of slewing bearing features an inner ring, outer ring, two rows of steel balls, and spacers. Its dual-row configuration significantly increases load-carrying capacity, allowing it to support large axial forces, radial forces, and overturning moments simultaneously—ideal for demanding applications.

What are the main application areas for Double-Row Ball Slewing Bearings?

These bearings are widely used in:

Large construction machinery
Port handling equipment
Cranes
Wind turbines
Rotating bridge structures

They are suitable for any application requiring high load capacity and stability.

What key factors should be considered when selecting a slewing bearing?

Load capacity
Dimensional precision
Rotational speed requirements
Overall size and installation space
Sealing and lubrication conditions
Manufacturing quality and process reliability

Do you offer customized slewing bearing solutions?

Yes. Our experienced engineering team provides custom solutions tailored to your specific requirements. We manufacture slewing bearings ranging from an inner diameter of around 200 mm to an outer diameter of 20 meters or more.