Three-Row Roller Slewing Bearings: Heavy-Duty Rotation for Maximum Load Performance
What Is a Three-Row Roller Slewing Bearing?
A three-row roller slewing bearing is a high-load capacity bearing that consists of three separate raceways, each with its own roller set—one for axial loads, one for radial loads, and one for tilting moments. This design allows the loads to be distributed across three rows of rollers, significantly increasing load capacity and rigidity compared to single-row or double-row designs.
Three-row slewing bearings are commonly used in ultra-heavy-duty applications such as harbor cranes, offshore drilling platforms, ladle turrets, bucket wheel excavators, and wind turbine yaw systems.
Key Advantages of Three-Row Roller Slewing Bearings
Extreme Load Carrying Capacity
Each roller row is optimized for a specific load type, which ensures maximum utilization of the bearing’s internal structure. This makes it the preferred choice for equipment that endures continuous high stress.
High Stability and Rigidity
The separated load paths minimize raceway deformation and provide strong resistance against overturning moments, enabling precise and safe rotation under challenging conditions.
Extended Service Life
Due to even stress distribution and optimized material usage, these bearings offer improved fatigue life and durability—even under dynamic loads and variable speeds.
Versatility in Harsh Environments
Engineered with heavy sealing systems and surface treatments, they perform reliably in marine, mining, and steel plant conditions with exposure to heat, dust, and corrosive media.
Where Are They Used?
| Industry | Equipment |
| Port Logistics | Container cranes, ship loaders |
| Mining & Excavation | Bucket wheel excavators, stackers |
| Offshore Oil & Gas | Pipe handling equipment, drilling platforms |
| Metallurgy | Ladle turrets, slab turning devices |
| Wind Power | Large yaw systems for offshore turbines |
LDB’s Three-Row Slewing Bearing Portfolio
LDB is a top-tier manufacturer and global supplier of three-row roller slewing bearings, offering standard and custom-engineered solutions for large-scale equipment.
Product Specifications:
Outer diameter range: 800 mm – 5000 mm
Roller diameters: customized per application
Raceway precision: CNC-ground hardened steel
Gear types: external gear, internal gear, or gearless
Sealing: double-lip contact seals with grease retention
Surface treatment: black oxide, phosphate, or epoxy painting
All bearings are factory-lubricated and tested under simulated load conditions.
Typical Pricing and Considerations
Three-row slewing bearings involve higher raw material and machining costs due to their size and complexity. Pricing varies with:
Size and raceway design
Gear module and tooth hardness
Seal grade and coating requirement
Additional testing or documentation (e.g., ABS, DNV)
Typical Price Range: USD $2,000 – $20,000 per unit
For specialized offshore or certified products, costs may exceed this range.
To get a tailored quote, visit www.ldb-bearing.com.
Engineering & Customization Services
LDB offers full technical support from design to deployment:
Load simulation and life prediction (L10h method)
Material selection and gear customization
Bolt pattern optimization for heavy bases
Special packaging for offshore or export use
Clients receive full documentation including 2D/3D drawings, heat treatment certificates, and inspection reports.
Why Choose LDB?
Decades of experience in heavy-equipment bearings
In-house forging, heat treatment, and assembly
Exported to 40+ countries for major EPC and OEM projects
Flexible lead times and responsive technical team
LDB’s three-row roller slewing bearings are trusted by global manufacturers of cranes, excavators, and renewable energy systems.
Installation Tips
Ensure full support surface under bearing
Apply uniform torque across all mounting bolts
Use calibrated torque tools and recheck tension after 100 hours
Re-grease according to duty cycle and environmental exposure
Conclusion
Three-row roller slewing bearings are the ultimate choice for ultra-heavy load applications where safety, strength, and reliability cannot be compromised. Their robust construction and load-specialized raceways make them essential for mega-projects worldwide.
LDB delivers these high-capacity bearings with complete technical assurance, backed by global service and precision manufacturing. Let us power your next heavy-duty innovation—start at www.ldb-bearing.com.
Three-Row Roller Slewing Bearings: Heavy-Duty Rotation for Maximum Load Performance
What Is a Three-Row Roller Slewing Bearing?
A three-row roller slewing bearing is a high-load capacity bearing that consists of three separate raceways, each with its own roller set—one for axial loads, one for radial loads, and one for tilting moments. This design allows the loads to be distributed across three rows of rollers, significantly increasing load capacity and rigidity compared to single-row or double-row designs.
Three-row slewing bearings are commonly used in ultra-heavy-duty applications such as harbor cranes, offshore drilling platforms, ladle turrets, bucket wheel excavators, and wind turbine yaw systems.
Key Advantages of Three-Row Roller Slewing Bearings
Extreme Load Carrying Capacity
Each roller row is optimized for a specific load type, which ensures maximum utilization of the bearing’s internal structure. This makes it the preferred choice for equipment that endures continuous high stress.
High Stability and Rigidity
The separated load paths minimize raceway deformation and provide strong resistance against overturning moments, enabling precise and safe rotation under challenging conditions.
Extended Service Life
Due to even stress distribution and optimized material usage, these bearings offer improved fatigue life and durability—even under dynamic loads and variable speeds.
Versatility in Harsh Environments
Engineered with heavy sealing systems and surface treatments, they perform reliably in marine, mining, and steel plant conditions with exposure to heat, dust, and corrosive media.
Where Are They Used?
| Industry | Equipment |
| Port Logistics | Container cranes, ship loaders |
| Mining & Excavation | Bucket wheel excavators, stackers |
| Offshore Oil & Gas | Pipe handling equipment, drilling platforms |
| Metallurgy | Ladle turrets, slab turning devices |
| Wind Power | Large yaw systems for offshore turbines |
LDB’s Three-Row Slewing Bearing Portfolio
LDB is a top-tier manufacturer and global supplier of three-row roller slewing bearings, offering standard and custom-engineered solutions for large-scale equipment.
Product Specifications:
Outer diameter range: 800 mm – 5000 mm
Roller diameters: customized per application
Raceway precision: CNC-ground hardened steel
Gear types: external gear, internal gear, or gearless
Sealing: double-lip contact seals with grease retention
Surface treatment: black oxide, phosphate, or epoxy painting
All bearings are factory-lubricated and tested under simulated load conditions.
Typical Pricing and Considerations
Three-row slewing bearings involve higher raw material and machining costs due to their size and complexity. Pricing varies with:
Size and raceway design
Gear module and tooth hardness
Seal grade and coating requirement
Additional testing or documentation (e.g., ABS, DNV)
Typical Price Range: USD $2,000 – $20,000 per unit
For specialized offshore or certified products, costs may exceed this range.
To get a tailored quote, visit www.ldb-bearing.com.
Engineering & Customization Services
LDB offers full technical support from design to deployment:
Load simulation and life prediction (L10h method)
Material selection and gear customization
Bolt pattern optimization for heavy bases
Special packaging for offshore or export use
Clients receive full documentation including 2D/3D drawings, heat treatment certificates, and inspection reports.
Why Choose LDB?
Decades of experience in heavy-equipment bearings
In-house forging, heat treatment, and assembly
Exported to 40+ countries for major EPC and OEM projects
Flexible lead times and responsive technical team
LDB’s three-row roller slewing bearings are trusted by global manufacturers of cranes, excavators, and renewable energy systems.
Installation Tips
Ensure full support surface under bearing
Apply uniform torque across all mounting bolts
Use calibrated torque tools and recheck tension after 100 hours
Re-grease according to duty cycle and environmental exposure
Conclusion
Three-row roller slewing bearings are the ultimate choice for ultra-heavy load applications where safety, strength, and reliability cannot be compromised. Their robust construction and load-specialized raceways make them essential for mega-projects worldwide.
LDB delivers these high-capacity bearings with complete technical assurance, backed by global service and precision manufacturing. Let us power your next heavy-duty innovation—start at www.ldb-bearing.com.