When your equipment demands maximum load capacity and precision under extreme conditions, the Heavy-Duty Slewing Bearing delivers uncompromising performance. This large-diameter rotational bearing handles axial, radial, and tilting moment loads simultaneously in critical heavy machinery applications. The product features a specialized triple-row roller configuration that distributes loads across dedicated roller sets, ensuring optimal performance where conventional bearings fail. Engineered for bucket-wheel excavators, mobile cranes, and harbor equipment, these bearings provide the structural backbone for machinery operating in the most demanding industrial environments.

|
Bearing Type
|
Model Number
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Internal Diameter (d) mm
|
External Diameter (D) mm
|
Width (B) mm
|
Static Load Capacity (C₀) kN
|
Dynamic Load Capacity (C) kN
|
Rolling Element Type
|
Material
|
Sealing Structure
|
Lubrication Method
|
Application Scenarios
|
Weight kg
|
|
Single-row Four-point Contact Ball Slewing Ring
|
011.25.400
|
400
|
540
|
48
|
620
|
280
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Small cranes, aerial work platforms
|
42
|
|
|
011.25.500
|
500
|
650
|
56
|
850
|
380
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Tower cranes, port loading machinery
|
68
|
|
|
011.25.630
|
630
|
800
|
65
|
1200
|
550
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Mobile cranes, concrete mixers
|
105
|
|
|
011.25.800
|
800
|
1000
|
75
|
1800
|
820
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal + Dust Cover
|
Lithium-based Grease (NLGI 2)
|
Large-tonnage truck cranes
|
185
|
|
Single-row Crossed Roller Slewing Ring
|
021.20.315
|
315
|
430
|
40
|
950
|
420
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
Robotic arms, precision rotary tables
|
35
|
|
|
021.20.400
|
400
|
520
|
45
|
1500
|
680
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
CNC machine tools, radar antennas
|
58
|
|
|
021.20.500
|
500
|
650
|
50
|
2000
|
920
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
Precision machining centers, satellite communication equipment
|
92
|
|
|
021.20.630
|
630
|
780
|
55
|
2800
|
1250
|
Crossed Roller
|
42CrMo
|
Metal Face Seal + Oil Seal
|
High-temperature Lithium-based Grease
|
Large precision rotary platforms
|
145
|
|
Double-row Ball Slewing Ring
|
022.30.630
|
630
|
850
|
70
|
2500
|
1100
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Medium-tonnage cranes, ship unloaders
|
168
|
|
|
022.30.800
|
800
|
1060
|
80
|
3200
|
1450
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Large cranes, wind turbine yaw systems
|
245
|
|
|
022.30.1000
|
1000
|
1320
|
95
|
4500
|
2000
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Wind turbine pitch systems, mining machinery
|
380
|
|
Three-row Roller Slewing Ring
|
131.40.1000
|
1000
|
1400
|
105
|
6500
|
2800
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Heavy-duty excavators, tunnel boring machines
|
520
|
|
|
131.40.1200
|
1200
|
1600
|
120
|
8000
|
3500
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Offshore platforms, metallurgical equipment
|
750
|
|
|
131.40.1500
|
1500
|
1950
|
140
|
12000
|
5000
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Super heavy-duty machinery, large ship cranes
|
1280
|
|
Ball-Roller Combined Slewing Ring
|
031.35.630
|
630
|
880
|
85
|
3000
|
1300
|
Ball + Roller
|
42CrMo
|
Double Lip Rubber Seal + Metal Dust Cover
|
Lithium-based Grease + Periodic Oil Injection
|
Mixed load machinery, port container cranes
|
210
|
|
|
031.35.800
|
800
|
1100
|
95
|
4200
|
1800
|
Ball + Roller
|
42CrMo
|
Double Lip Rubber Seal + Metal Dust Cover
|
Lithium-based Grease + Periodic Oil Injection
|
Large-scale stacking machines, heavy-duty transfer equipment
|
320
|
Triple-Row Roller Configuration
The Heavy-Duty Slewing Bearing employs a sophisticated load distribution system through its three-row design:
This load specialization eliminates interference between different force types while maximizing bearing efficiency.
Multi-Ring Structure
The bearing consists of three precision-machined rings: inner ring, outer ring, and intermediate ring. Each ring houses dedicated raceways for specific roller rows. This integrated approach eliminates the complexity of multiple bearing assemblies while reducing installation space requirements.

Prevalent Stack Capacity
The specialized roller arrangement empowers taking care of of extraordinary combined loads. Outspread loads reach a few hundred tons whereas tilting minutes can surpass thousands of kN·m. This makes the bearing reasonable for applications where routine heading would involvement disastrous overload.
Enhanced Inflexibility and Precision
Line contact between rollers and raceways over all three columns gives extraordinary inflexibility. The plan essentially outflanks ball-type or single-row roller heading in keeping up positional exactness beneath energetic loads. Negligible diversion guarantees exact rotational situating indeed amid fast movement changes.
Compact Plan Solution
Despite heavy-duty execution capabilities, the coordinates three-row structure offers a more compact impression than multi-bearing gatherings. This space proficiency demonstrates especially profitable in expansive gear where establishment limitations restrain plan options.
Extended Benefit Life
Load specialization decreases wear designs and stretch concentrations over roller lines. High-quality bearing steel materials combined with accuracy fabricating improve weariness resistance. Pre-lubricated fixed variations amplify re-lubrication interims, minimizing operational downtime.
Adapt Integration
Choose from inner equip, outside equip, or gearless plans based on your torque transmission prerequisites. Adapted variations back coordinate rotational control for heavy-duty applications.
Environmental Protection
Double-lip fixed orientation come pre-lubricated with high-temperature oil and give tidy and water resistance. Open-type arrangements suit controlled, clean environments.
Material Selection
Standard high-strength chromium steel incorporates carburizing and extinguishing warm treatment. Discretionary stainless steel or specialized coatings give improved erosion resistance for marine applications.
Our fabricating prepare takes after strict quality control conventions with three-level assessment frameworks. Each bearing experiences confirmation of 12 center execution markers counting vibration testing and life cycle approval. We keep up an ex-factory capability rate surpassing 99.9%.
Standard heading dispatch inside 48 hours from our stock of over 1,000 bearing sorts. Custom setups utilize optimized measured generation forms, decreasing conveyance times to 70% of industry midpoints. Expansive custom orientation up to φ3000mm regularly dispatch inside 15-20 days.
Our experienced designing group gives comprehensive specialized bolster all through your venture lifecycle. Administrations incorporate on-site estimation for hardware adjustment, establishment direction, and preventive upkeep arranging. We keep up 24-hour specialized interview accessibility to minimize gear downtime risks.
For applications requiring exact fit confirmation, we offer worldwide on-site mapping administrations utilizing proficient estimation rebellious. This guarantees 100% compatibility between heading and existing gear, especially profitable for retrofitting more seasoned apparatus.

The Heavy-Duty Slewing Bearing represents three decades of engineering expertise in demanding industrial applications. Our team stands ready to analyze your specific requirements and recommend the optimal bearing configuration for your equipment needs.
Contact our engineering specialists at auto@lyautobearing.com to discuss your application requirements. We provide detailed technical consultation, performance analysis, and customized solutions that ensure reliable operation in your most challenging environments.
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