Double the Power: Understanding Double Row Ball Slewing Bearings
What is a Double Row Ball Slewing Bearing?
A Double Row Ball Slewing Bearing is a rotational rolling-element bearing with two rows of steel balls that contact the raceways at varying angles. Compared to single-row designs, double row slewing bearings offer higher axial and radial load capacity and are especially suited for applications requiring robust and stable support under heavy-duty operations.
This bearing type is widely used in construction equipment, port machinery, and wind power systems where high load demands, space efficiency, and long service life are essential.
Structural Advantages
Enhanced Load Distribution
Two rows of balls provide more contact points, distributing loads more evenly across the raceways and improving bearing rigidity and rotational accuracy.
Increased Axial and Radial Load Capacity
Double row ball designs can handle higher axial and tilting moment loads than four-point contact bearings, making them ideal for large cranes, rotary drills, and offshore platforms.
Vibration and Shock Resistance
The enhanced structure improves resistance to external shock and vibrations, ensuring operational safety in harsh environments.
Gear Customization
LDB provides these bearings with internal gear, external gear, or gearless designs to fit specific application needs.
Common Applications
Truck Cranes and Tower Cranes: Supporting large, rotating superstructures under dynamic loading conditions.
Harbor and Container Machinery: Handling high-speed, high-frequency operations.
Large Excavators and Rotary Drilling Rigs: Providing stable rotation for precision digging and drilling.
Wind Power Equipment: Used in yaw and pitch systems to support nacelle rotation.
LDB’s Double Row Ball Slewing Bearing Highlights
LDB Bearing manufactures its double row ball slewing bearings with high-grade materials like 42CrMo for rings and GCr15 for balls. All raceways are precision-ground, and surface hardening ensures durability under extreme loads.
Technical Parameters:
Outer Diameter Range: 500 mm to 6000 mm
Ball Row Configurations: Equal diameter or stepped ball rows for customized force management
Sealing: Labyrinth and contact seals for dust and water ingress protection
Lubrication: Factory-lubricated with optional automatic greasing systems
LDB also supports customer-specific bolt hole layouts, custom sealing systems, and integrated gear teeth hardening.
Pricing, Supplier, and Manufacturer Information
LDB Bearing is a leading manufacturer and supplier of high-load slewing rings, including double row ball slewing bearings, with over 20 years of experience. Located in Luoyang, China, LDB supplies to more than 50 countries across construction, energy, and port logistics industries.
Price Factors Include:
Outer diameter and thickness
Gear type and material selection
Surface coating and sealing configuration
Custom options and volume
Typical price ranges from USD 800 to USD 5000 depending on the specification. Clients can request quotations and CAD drawings directly via LDB’s website.
Why Choose LDB?
In-house manufacturing and heat treatment
Fast production cycles and global shipping
ISO 9001-certified QA system
Responsive pre- and post-sales engineering support
Whether you’re integrating slewing bearings into a crane, drill rig, or wind turbine, LDB’s double row ball slewing bearings provide the performance and reliability required for continuous operation.
Conclusion
Double Row Ball Slewing Bearings represent a perfect combination of strength, flexibility, and durability. With LDB’s engineering expertise and proven quality, your machinery can reach new heights of stability and load capacity. Choose LDB for world-class slewing solutions built to last.