How to Choose the Right Slewing Bearing for Heavy-Duty Equipment
What Is a Slewing Bearing?
A slewing bearing, also known as a slewing ring or turntable bearing, is a specialized bearing that allows rotational movement between two components, typically supporting axial, radial, and moment loads simultaneously. These bearings are essential in heavy-duty machinery where large-scale, slow-speed rotational motion is required—such as in excavators, cranes, wind turbines, and offshore platforms.
Slewing bearings are designed to handle complex mechanical demands while operating reliably under harsh environmental conditions. They are available in various configurations depending on the load, motion requirements, and application.
Key Types of Slewing Bearings and Their Applications
Understanding the differences between slewing bearing types is crucial in selecting the right model. The most common options include:
Four Point Contact Ball Slewing Bearing
Structure: Single row, four-point contact ball design
Applications: Cranes, excavators, rotating platforms
Benefits: Supports axial and moment loads in both directions with compact design
Double Row Ball Slewing Bearing
Structure: Two rows of balls for increased load capacity
Applications: Tower cranes, construction equipment
Benefits: Enhanced axial and radial load support
Three-Row Roller Slewing Bearing
Structure: Three separate raceways for radial, axial, and moment load separation
Applications: Offshore cranes, tunnel boring machines, wind turbines
Benefits: Extremely high load capacity and stability
Cross Roller Slewing Bearing
Structure: Cylindrical rollers arranged in a crossed pattern
Applications: Robotics, precision rotating platforms
Benefits: High precision and rigidity with minimal clearance
Flanged Slewing Bearing
Structure: Built-in flange on inner or outer ring
Applications: Compact equipment, robotics, solar trackers
Benefits: Easy installation and alignment, space-saving
Factors to Consider When Selecting a Slewing Bearing
Choosing the right slewing bearing depends on several performance and application parameters:
Load Characteristics
Determine the magnitude and direction of axial, radial, and moment loads.
Three-row roller bearings are best for extreme loads; four-point contact bearings suit moderate applications.
Rotational Speed and Precision
High-precision systems like robotics may require cross roller bearings with minimal backlash.
For slow and intermittent rotation, double-row or four-point contact bearings suffice.
Installation Space
Flanged bearings are ideal for tight spaces due to their integrated mounting features.
Select compact designs for mobile machinery or space-limited environments.
Environmental Conditions
Marine, desert, or arctic conditions require corrosion-resistant materials, seals, and special greases.
LDB offers anti-rust coatings and special sealing options for harsh environments.
Mounting and Maintenance
Evaluate ease of installation, lubrication accessibility, and service intervals.
LDB provides detailed mounting instructions and optional maintenance-free solutions.
LDB Slewing Bearing Solutions
As a global manufacturer and supplier, LDB offers a comprehensive line of slewing bearings engineered for industrial, construction, and energy applications. All products are manufactured under ISO 9001 standards and can be customized according to project requirements.
Popular Models:
Four Point Contact Ball Slewing Bearing (LDB-FQ Series)
Double Row Ball Slewing Bearing (LDB-DB Series)
Three-Row Roller Slewing Bearing (LDB-TR Series)
Cross Roller Slewing Bearing (LDB-CR Series)
Flanged Slewing Bearing (LDB-FL Series)
Price Considerations
Slewing bearing prices vary depending on size, material, and load capacity. Below is a general guide:
| Bearing Type | Typical Price Range (USD) |
| Four Point Contact Ball | $150 – $600 |
| Double Row Ball | $400 – $1000 |
| Three-Row Roller | $900 – $3000+ |
| Cross Roller | $300 – $1200 |
| Flanged Slewing Bearing | $180 – $800 |
LDB provides factory-direct pricing, volume discounts, and tailored quotes for OEM and system integrators.
Finding the Right Manufacturer and Supplier
Choosing a reliable slewing bearing supplier is essential for ensuring performance, safety, and longevity. LDB stands out by offering:
Global delivery capabilities
In-house design and technical support
Long-term spare parts availability
Custom manufacturing options (diameter, bolt pattern, coating)
As a trusted manufacturer, LDB has successfully served customers in over 50 countries and supports industries ranging from construction to clean energy.
Why Choose LDB?
20+ Years of Experience in slewing technology
Advanced Production Lines and CNC machining centers
Testing Facilities for load, vibration, and fatigue simulation
Comprehensive Product Catalog with over 1000 models
After-Sales Support including technical training and online diagnostics
Conclusion
Selecting the right slewing bearing is about more than size—it’s about load, precision, environment, and reliability. By understanding the key bearing types and application needs, you can optimize performance and extend machine life. With LDB’s technical support, manufacturing excellence, and global service, you can confidently select the ideal slewing bearing solution.
Ready to choose your bearing? Contact LDB today for a tailored recommendation and competitive pricing.