Double Row Ball Slewing Bearing

Double Row Ball Slewing Bearing – Precision Engineered for Heavy-Duty Rotation

When your equipment demands reliable rotation under heavy loads, the Double Row Ball Slewing Bearing delivers proven performance. This bearing features two rows of precision steel balls arranged to handle combined axial, radial, and moment loads simultaneously. At Luoyang Heng Guan Bearing Technology, we manufacture these bearings for critical applications in cranes, excavators, wind turbines, and industrial machinery. With diameters ranging from 500mm to 5500mm, our product provides the load capacity and rotational accuracy your equipment needs.

Product Details

Our double-row ball slewing bearing uses an optimized ball arrangement that distributes loads across two raceways. This configuration increases load capacity while maintaining compact axial dimensions. The bearing integrates mounting holes in both inner and outer rings, simplifying installation and reducing assembly time.

Available Configurations:

· Standard double-row ball type

· Reduced-diameter ball variant for weight-sensitive applications

· Reinforced seal design for harsh environments

· Internal or external Gear options for direct drive applications

The bearing housing is constructed from 42CrMo or 50Mn alloy steel, which undergoes heat treatment to achieve the required structural strength. The rolling elements are manufactured from GCr15SiMn bearing steel, hardened to HRC 60-64 for superior wear resistance. Seals are made from imported nitrile rubber (NBR) or fluororubber (FKM) to prevent contamination ingress.

Why Choose Us?

Industry Expertise
Our engineering team possesses over 20 years of specialized experience in bearing design and manufacturing, providing deep insight into the operational challenges your equipment faces.

Manufacturing Capabilities
Our production facility is equipped with advanced CNC vertical lathes, CNC heat treatment machines, CNC gear shapers, and precision grinding equipment. This integrated setup allows us to maintain strict quality control at every stage of the manufacturing process.

Quality Assurance
Our ISO 9001-certified quality management system ensures consistent product excellence. Additionally, our RoHS compliance guarantees material safety for global market准入.

Customization & Engineering Support
We offer comprehensive services including specialized consultation, custom product design, and non-standard customization. For legacy equipment, we provide reverse-engineering services, working from your existing bearing samples or 2D drawings.

Global Presence
Our products and solutions serve clients in over 50 countries worldwide, including key markets such as the United States, Germany, Australia, and the Middle East.

Technical Specifications

Custom specifications available upon request

Certification

Features and Benefits

Dual Raceway Design
By distributing loads across two ball rows, it increases capacity without enlarging the outer dimensions—ideal for spaceconstrained installations.

MultiDirectional Load Handling
By managing axial thrust, radial forces, and tilting moments in a single unit, you eliminate the need for complex multibearing assemblies.

Low Starting Torque
Its optimized ballcontact geometry reduces starting friction, allowing you to use smaller motors and cut energy consumption.

High Rotational Accuracy
Precisionground raceways maintain tight tolerances to minimize vibration and extend service life in applications demanding smooth operation.

Integrated Sealing
A combination of labyrinth seals and elastomer gaskets protects against dust, moisture, and debris, ensuring reliable performance outdoors and in contaminated settings.

Mounting Hole Integration
Predrilled holes in both inner and outer rings simplify bolton installation, reducing assembly time and ensuring proper alignment.

Applications

Construction Machinery
These bearings are integral to the turntable assemblies of excavators, truck cranes, and tower cranes. They are engineered to handle the heavy boom loads and rigorous slewing operations required at demanding job sites.

Port Equipment
Container cranes and portal cranes depend on Double Row Ball Slewing Bearings for precise load positioning and continuous, reliable slewing under heavy cargo, ensuring efficient port operations.

Material Handling
In concrete pump trucks, these bearings enable zero-clearance operation, which is critical for precise boom control and maintaining accuracy during frequent repositioning.

Wind Energy
For pitch control systems in wind turbines, our bearings deliver the high starting torque accuracy and smooth running precision necessary to adjust blade angles for optimal power generation.

Industrial Machinery
Steelmaking converters, rolling mills, and rotary tables rely on these bearings for dependable slewing performance in extreme environments, including high temperatures and under heavy loads.

Entertainment Equipment
Large amusement rides and rotating stage machinery require exceptionally smooth and quiet rotation. Our bearings provide the safe, reliable, and low-noise motion essential for public-facing applications.

Installation Guide

Pre-Installation Checks

Inspect mounting surfaces for flatness and cleanliness. Remove burrs, paint, or debris that could affect bearing contact.

Mounting Procedure

1. Apply anti-seize compound to bolt threads

2. Position bearing on the lower mounting surface

3. Align mounting holes carefully

4. Install bolts in a star pattern, tightening gradually

5. Torque bolts to specifications provided in product documentation

Alignment Verification
Measure radial runout using a dial indicator. Adjust the mounting if the measured runout exceeds the permissible limit for your application.

Lubrication
Fill all grease channels through the lubrication ports. Use a lithium-based grease rated for your specific operating temperature range.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Maintenance and Care

Lubrication Schedule
Re-grease every 100 operating hours or monthly, whichever comes first. Increase the frequency in dusty, humid, or high-load operating conditions.

Inspection Intervals
Listen and feel for unusual noise, vibration, or excessive temperature rise during operation. Inspect the seals quarterly for signs of wear, hardening, or damage.

Bolt Torque Verification
Re-torque all mounting bolts after the first 50 hours of operation. Perform an annual torque check thereafter to ensure preload is maintained.

Contamination Prevention
Keep the sealing surfaces clean and free of debris. Replace damaged or worn seals immediately to prevent the ingress of abrasive particles and moisture.

FAQ

Q: What loads can this bearing handle?
A: This bearing is designed to handle combined axial, radial, and moment loads simultaneously. Its load ratings are dependent on the specific size and configuration. Please Contact Us with your application details for precise loadcapacity data.

Q: Do you offer custom sizes?
A: Yes. We manufacture bearings to customer specifications, including nonstandard diameters and custom gear configurations.

Q: What is the typical lead time?
A: Standardsize bearings are shipped within 23 weeks. Custom bearings require 46 weeks for production, depending on complexity.

Q: Can this bearing be used outdoors?
A: Yes. Models with reinforced seals are designed for outdoor applications. We can help you select the appropriate seal material (e.g., NBR or FKM) based on your specific environmental conditions.

Q: What documentation do you provide?
A: Each bearing is supplied with a comprehensive documentation package, including dimensional drawings, installation instructions, and material certificates.

Contact Us

Need technical assistance or a custom quote? Our engineering team is ready to help you select the right Double Row Ball Slewing Bearing for your application.

Email: mia@hgb-bearing.com