Three-Row Roller Slewing Bearings: The Ultimate Load-Bearing Powerhouse
What is a Three-Row Roller Slewing Bearing?
A Three-Row Roller Slewing Bearing is a high-capacity rotational bearing system that features three separate rows of rollers—each row designed to carry different types of load. Unlike single or double-row ball bearings, this design separates axial, radial, and tilting moment loads across three distinct paths, dramatically increasing the load-bearing capacity, stiffness, and operational safety.
These bearings are the largest and most robust slewing rings available in the industry and are widely used in heavy-duty applications that demand uncompromising strength and reliability.
Design Advantages
Triple-Path Load Segregation
Each row of rollers handles a specific load: axial, radial, or moment. This optimized load distribution allows for safe operation under extreme mechanical stress.
Large Contact Areas
Rollers offer line contact instead of point contact like ball bearings, which reduces stress concentration and increases wear resistance.
High Stiffness and Stability
The three-row structure significantly boosts system stiffness, minimizing deflection even under high load or dynamic conditions.
Wide Diameter Range
Due to their robust structure, Three-Row Roller Bearings are available in large diameters, often exceeding 10 meters, to support massive machines.
Gear and Non-Gear Variants
Options include external gear, internal gear, or no gear, supporting various torque transmission needs.
Where Are They Used?
Bucket Wheel Excavators: Massive radial and axial loads in continuous material removal.
Ship Cranes and Offshore Platforms: Extreme moment and vibration resistance in marine conditions.
Radar Antennas and Large Turntables: Precise yet heavy-duty rotation under dynamic loads.
Steel Mills and Rotary Kilns: High-temperature, continuous-duty installations.
Tunnel Boring Machines: Demanding torque and load demands in harsh underground environments.
LDB’s Three-Row Roller Slewing Bearings
LDB Bearing, a globally recognized manufacturer, offers a wide selection of Three-Row Roller Slewing Bearings engineered for critical tasks. Each bearing is manufactured in LDB’s ISO-certified facilities using high-strength alloy steel (42CrMo or 50Mn) and roller elements made of GCr15 precision steel.
LDB Features:
Outer Diameter Range: 1000 mm to over 10,000 mm
Load Rating: Over 10 million Nm tilting moment capacity in custom models
Gear Treatment: Induction hardening and CNC gear cutting for high torque transfer
Sealing: Multi-lip seals for water, dust, and chemical protection
Lubrication: Multi-point grease channels with optional auto-lube systems
LDB also offers custom tooth profiles, bolt hole arrangements, and anti-corrosion coatings to meet industry-specific requirements.
Price, Supplier, and Manufacturer Insights
As a premier supplier and manufacturer, LDB provides comprehensive solutions for industries that rely on ultra-heavy-duty slewing systems.
Pricing Factors Include:
Outer diameter and number of rollers
Gear design and torque requirements
Operational environment (e.g., marine, underground)
Custom sealing, mounting, and lubrication systems
Typical Price Range: USD $5000 to $50,000+ depending on dimensions and load capacity.
All price inquiries are handled directly by LDB’s engineering team via www.ldb-bearing.com, where clients can submit 3D CAD files, request test reports, or consult on long-term bulk procurement.
Why Heavy Machinery OEMs Choose LDB
Over 20 years of field-proven design experience
Gear shaping accuracy to DIN 3960/61 standards
Heat-treated raceways for high-cycle fatigue resistance
Application-specific simulation and bearing life prediction
After-sales support with on-site service and global logistics
LDB’s three-row roller slewing bearings have been successfully deployed in over 30 countries, powering the world’s largest cranes, transporters, and energy systems.
Conclusion
When failure is not an option and load conditions are extreme, Three-Row Roller Slewing Bearings are the solution. With LDB as your supplier, you gain access to world-class engineering, manufacturing precision, and tailored support for the most demanding scenarios. Let your machines carry more—with confidence.
Three-Row Roller Slewing Bearings: The Ultimate Load-Bearing Powerhouse
What is a Three-Row Roller Slewing Bearing?
A Three-Row Roller Slewing Bearing is a high-capacity rotational bearing system that features three separate rows of rollers—each row designed to carry different types of load. Unlike single or double-row ball bearings, this design separates axial, radial, and tilting moment loads across three distinct paths, dramatically increasing the load-bearing capacity, stiffness, and operational safety.
These bearings are the largest and most robust slewing rings available in the industry and are widely used in heavy-duty applications that demand uncompromising strength and reliability.
Design Advantages
Triple-Path Load Segregation
Each row of rollers handles a specific load: axial, radial, or moment. This optimized load distribution allows for safe operation under extreme mechanical stress.
Large Contact Areas
Rollers offer line contact instead of point contact like ball bearings, which reduces stress concentration and increases wear resistance.
High Stiffness and Stability
The three-row structure significantly boosts system stiffness, minimizing deflection even under high load or dynamic conditions.
Wide Diameter Range
Due to their robust structure, Three-Row Roller Bearings are available in large diameters, often exceeding 10 meters, to support massive machines.
Gear and Non-Gear Variants
Options include external gear, internal gear, or no gear, supporting various torque transmission needs.
Where Are They Used?
Bucket Wheel Excavators: Massive radial and axial loads in continuous material removal.
Ship Cranes and Offshore Platforms: Extreme moment and vibration resistance in marine conditions.
Radar Antennas and Large Turntables: Precise yet heavy-duty rotation under dynamic loads.
Steel Mills and Rotary Kilns: High-temperature, continuous-duty installations.
Tunnel Boring Machines: Demanding torque and load demands in harsh underground environments.
LDB’s Three-Row Roller Slewing Bearings
LDB Bearing, a globally recognized manufacturer, offers a wide selection of Three-Row Roller Slewing Bearings engineered for critical tasks. Each bearing is manufactured in LDB’s ISO-certified facilities using high-strength alloy steel (42CrMo or 50Mn) and roller elements made of GCr15 precision steel.
LDB Features:
Outer Diameter Range: 1000 mm to over 10,000 mm
Load Rating: Over 10 million Nm tilting moment capacity in custom models
Gear Treatment: Induction hardening and CNC gear cutting for high torque transfer
Sealing: Multi-lip seals for water, dust, and chemical protection
Lubrication: Multi-point grease channels with optional auto-lube systems
LDB also offers custom tooth profiles, bolt hole arrangements, and anti-corrosion coatings to meet industry-specific requirements.
Price, Supplier, and Manufacturer Insights
As a premier supplier and manufacturer, LDB provides comprehensive solutions for industries that rely on ultra-heavy-duty slewing systems.
Pricing Factors Include:
Outer diameter and number of rollers
Gear design and torque requirements
Operational environment (e.g., marine, underground)
Custom sealing, mounting, and lubrication systems
Typical Price Range: USD $5000 to $50,000+ depending on dimensions and load capacity.
All price inquiries are handled directly by LDB’s engineering team via www.ldb-bearing.com, where clients can submit 3D CAD files, request test reports, or consult on long-term bulk procurement.
Why Heavy Machinery OEMs Choose LDB
Over 20 years of field-proven design experience
Gear shaping accuracy to DIN 3960/61 standards
Heat-treated raceways for high-cycle fatigue resistance
Application-specific simulation and bearing life prediction
After-sales support with on-site service and global logistics
LDB’s three-row roller slewing bearings have been successfully deployed in over 30 countries, powering the world’s largest cranes, transporters, and energy systems.
Conclusion
When failure is not an option and load conditions are extreme, Three-Row Roller Slewing Bearings are the solution. With LDB as your supplier, you gain access to world-class engineering, manufacturing precision, and tailored support for the most demanding scenarios. Let your machines carry more—with confidence.
