Wind turbine gearbox bearing systems represent the cornerstone of reliable wind power generation. These precision-engineered components operate within the critical drive train assembly, facilitating torque transmission from low-speed rotors to high-speed generators. With wind energy installations scaling to multi-megawatt capacities, your gearbox requires bearings that can withstand extreme operational demands including variable loads, thermal cycling, and continuous operation cycles exceeding 60,000 hours.
At Luoyang Auto Bearing Co., Ltd., we understand the engineering challenges you face. Our comprehensive bearing solutions address critical performance requirements while ensuring long-term reliability for your wind turbine systems.

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Bearing Category
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Model
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Inner Diameter (mm)
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Outer Diameter (mm)
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Width (mm)
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Load Capacity (kN)
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Applicable Wind Turbine Power (MW)
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Design Feature
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Application Position
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Material Grade
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Main Shaft Spherical Roller Bearing
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232/530 CA/W33
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530
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980
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308
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8500
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3.0-5.0
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Double-row, self-aligning, grease lubrication
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Main shaft (low-speed end)
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20CrNi2Mo
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Main Shaft Spherical Roller Bearing
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232/600 CA/W33
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600
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1090
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336
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10200
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5.0-8.0
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Enhanced cage structure, high-impact resistance
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Main shaft (low-speed end)
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20CrNiMo
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Gearbox Cylindrical Roller Bearing
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NU 234 ECML/C3
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170
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310
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52
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1250
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1.5-3.0
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Single-row, cylindrical roller, C3 clearance
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Gearbox intermediate shaft
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GCr15SiMn
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Gearbox Cylindrical Roller Bearing
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NU 240 ECML/C4
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200
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360
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58
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1800
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3.0-5.0
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High-precision grade, optimized roller profile
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Gearbox high-speed shaft
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GCr15
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Yaw Bearing (Four-point Contact Ball Bearing)
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013.40.2500
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2100
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2500
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120
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4500
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2.0-3.0
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Four-point contact, integral gear structure
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Yaw system
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42CrMo
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Yaw Bearing (Four-point Contact Ball Bearing)
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013.40.3550
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3100
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3550
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150
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6800
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5.0-8.0
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Split-type design, easy installation
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Yaw system
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42CrMo
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Pitch Bearing (Single-row Four-point Contact)
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011.40.1250
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1050
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1250
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80
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2200
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1.5-2.0
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Lightweight, sealed structure
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Pitch system (blade root)
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40Cr
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Pitch Bearing (Single-row Four-point Contact)
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011.40.1600
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1350
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1600
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100
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3500
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3.0-5.0
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High-torque bearing capacity, corrosion-resistant coating
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Pitch system (blade root)
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42CrMo
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Generator Bearing (Deep Groove Ball Bearing)
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6334 M/C3
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170
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360
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72
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950
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1.0-2.0
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High-speed rotation, low friction
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Generator rotor shaft
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GCr15
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Generator Bearing (Angular Contact Ball
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7328 BECBM
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140
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300
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62
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1100
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2.0-3.0
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Angular contact, paired installation
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Generator stator shaft
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GCr15SiMn
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Our bearing systems utilize advanced metallurgy to combat rolling contact fatigue. High-purity vacuum degassed steel (18CrNiMo7-6) provides superior material consistency. Case-carburized raceways achieve 58-62 HRC surface hardness while maintaining core toughness.
The heat treatment process includes vacuum quenching and precise tempering cycles. This combination delivers exceptional fatigue resistance under cyclic loading conditions typical in wind applications.
Structural Configuration
Tapered Roller Bearings feature separable cone-and-cup geometry. This design excels in handling combined radial and axial loads common in input shaft applications. The tapered contact angle ensures uniform stress distribution across the raceway.
Spherical Roller Bearings incorporate double-row self-aligning capability. They compensate for shaft misalignment up to ±1.5°, addressing installation tolerances and operational deflection in intermediate shaft positions.
Cylindrical Roller Bearings provide high radial capacity with minimal friction. Full-complement designs maximize load zones for extreme duty applications while maintaining dimensional stability.
Advanced Cage Technology
Precision-machined cages utilize solid brass or high-performance polymers. These materials provide optimal roller guidance while reducing friction losses. The cage design accommodates thermal expansion differentials during operation.
Sealing and Lubrication Systems
Integrated labyrinth seals achieve IP65 protection against contamination. Specialized lubrication channels (W33 configuration) ensure continuous oil circulation. This design prevents lubricant starvation during variable speed operation.

Load Management Capability
The optimized internal geometry distributes concentrated loads across maximum contact areas. Wind turbine gearbox bearing assemblies handle shock loads from grid events and wind gusts while maintaining dimensional integrity.
Contact stress calculations follow Hertzian theory with safety factors exceeding industry standards. Dynamic load ratings comply with ISO 281 methodology for extended fatigue life prediction.
Operational Reliability
Precision manufacturing maintains raceway geometry within ±0.01mm tolerances. This accuracy ensures consistent load zones and eliminates edge stress concentrations that can initiate premature failure modes.
The bearing design addresses white etching crack (WEC) formation through optimized material composition and surface treatments. Hydrogen permeation resistance protects against metallurgical degradation.
Maintenance Efficiency
Standardized dimensions ensure interchangeability with global bearing manufacturers. This compatibility simplifies inventory management and reduces downtime during maintenance operations.
Extended lubrication intervals reduce operational costs. Condition monitoring compatibility allows predictive maintenance scheduling based on actual bearing condition rather than calendar intervals.
Planetary Organize Integration
In 3MW-15MW turbine setups, heading back planet adapt congregations beneath tall torque conditions. The plan suits carrier misshapening whereas keeping up appropriate stack dissemination over rolling elements.
High-Speed Shaft Applications
Generator-side heading work at raised speeds with exact rotational precision necessities. Warm administration highlights avoid grease corruption amid ceaseless high-speed operation.
Environmental Adaptability
Offshore establishments require improved erosion assurance. Specialized coatings and fixing frameworks stand up to marine environment presentation whereas keeping up execution specifications.
Cold climate applications utilize low-temperature oils and materials chosen for warm cycling resistance. These adjustments guarantee solid beginning and operation in extraordinary conditions.
Manufacturing Standards
Our generation office keeps up ISO quality administration frameworks with specialized wind industry conventions. Each item experiences comprehensive dimensional confirmation and metallurgical testing.
Raw fabric certification incorporates chemical composition investigation and mechanical property approval. Warm treatment forms are checked with factual handle control to guarantee reliable results.
Performance Validation
Finished orientation total vibration investigation and stack testing conventions. Weariness life confirmation takes after quickened testing methods that mimic real wind turbine working conditions.
Quality documentation incorporates fabric traceability and execution test comes about. This information bolsters your gear certification necessities and guarantee programs.
Application Engineering
Our specialized group gives bearing choice direction based on your particular gearbox setup and working parameters. Stack investigation and life calculations guarantee ideal bearing determination for your application requirements.
Custom bearing arrangements address non-standard establishments or updated execution necessities. Plan alterations oblige interesting shaft courses of action or improved stack capacities.
Installation and Commissioning
Technical bolster incorporates appropriate establishment strategies and torque determinations. Our engineers give on-site help for basic establishments or upkeep operations requiring specialized expertise.
Condition checking framework integration makes a difference build up pattern execution information. This data underpins prescient upkeep programs and optimizes substitution scheduling.
Global Service Network
With key stock areas and coordinations organizations, we guarantee quick parts accessibility for your support operations. Standard orientation transport inside 48 hours, whereas custom setups keep up abbreviated lead times.
Technical meeting administrations give 24-hour back for pressing applications. Our building group helps with investigating and disappointment examination to minimize hardware downtime.

For technical specifications, application engineering support, or procurement inquiries regarding wind turbine gearbox bearing solutions, contact our engineering team at auto@lyautobearing.com. Our specialists provide comprehensive support from initial bearing selection through long-term maintenance planning.
Our commitment extends beyond component supply to include engineering partnership throughout your equipment lifecycle. Let us help optimize your wind turbine reliability and performance through precision bearing technology.
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