When you need reliable wind turbine performance, the pitch bearing becomes your most critical component. This specialized slewing ring bearing, installed at the root of each wind turbine blade, controls blade angle adjustments for optimal aerodynamic efficiency. Your wind energy operations depend on these bearings to maintain constant power output while protecting your equipment during extreme weather conditions. With over 30 years of bearing manufacturing expertise, Luoyang Auto Bearing Co., Ltd. understands the unique challenges you face in wind power applications. Our engineering team delivers the product solutions that withstand the demanding oscillating motion and complex load spectra inherent in modern wind turbine operations.

A product functions as the rotating interface between the turbine hub and blade root. Unlike conventional rotating bearings, these components operate primarily through oscillating motion within a -5° to 90° range. This unique motion pattern subjects the bearing to specific tribological challenges including false brinelling and fretting corrosion.
The bearing structure typically employs double-row four-point contact ball configurations or full complement cylindrical roller designs. These arrangements effectively manage the high dynamic loads generated during frequent blade start-stop operations. The integrated gear ring design enhances blade angle adjustment precision while maintaining structural integrity under varying wind conditions.
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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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Non-Soft Zone Quenching Technology
Our manufacturing process applies advanced heat treatment to ensure uniform raceway hardness. This technology eliminates soft zones that could lead to premature wear under the oscillating loads typical in wind turbine applications.
Optimized Lubrication System
The refined lubrication design maintains consistent grease distribution during frequent mechanical movements. This system reduces maintenance intervals and ensures reliable operation throughout the Pitch bearing's service life.
Enhanced Sealing Protection
Multiple sealing layers protect against moisture ingress and contamination. This design proves essential for offshore installations where salt spray and high humidity create challenging operating environments.
Tall Operational Precision
Our optimized raceway contact push conveyance minimizes edge point alteration mistakes. This exactness straightforwardly contributes to made strides control era productivity over shifting wind conditions.
Superior Weakness Resistance
Specialized fabric choice and controlled warm treatment forms convey remarkable anti-fatigue execution. Your hardware benefits from decreased disappointment likelihood amid visit start-stop cycles and rotating stack conditions.
Reduced Upkeep Requirements
Reliable fixing and oil plan amplifies benefit interims. This advantage demonstrates especially profitable for seaward wind turbines where upkeep get to remains troublesome and costly.

Onshore Wind Turbines (2MW - 5MW)
These establishments utilize dynamic pitch control frameworks requiring nonstop micro-adjustments. Our orientation handle high-cycle vibration whereas keeping up exact edge situating for ideal control bend management.
Offshore Wind Stages (6MW - 15MW+)
Large seaward turbines request supreme unwavering quality due to constrained support get to. Our upgraded fixing frameworks and anti-corrosion coatings withstand salt splash introduction whereas overseeing enormous inertial loads from edges surpassing 100 meters in length.
Cold Climate Installations
Arctic wind ventures require specialized low-temperature metallurgy tried to -40°C. Our manufactured oils keep up steady beginning torque in spite of thickness changes, anticipating pitch framework over-burden amid startup.
Our three-level quality control system ensures consistent product performance:
Each bearing undergoes comprehensive testing of 12 core performance indicators. Our manufacturing process achieves an ex-factory qualification rate exceeding 99.9%, suitable for harsh operating conditions across different wind power applications.
We maintain inventory of over 1,000 standard bearing types for rapid delivery within 48 hours. For customized solutions, our modular production process reduces lead times to 70% of industry standards. Large non-standard bearings with φ3000mm dimensions can be delivered within 15-20 days.

Our experienced engineering team provides comprehensive support throughout your project lifecycle:
With three decades of Pitch bearing industry experience, we combine independent manufacturing capabilities with strategic supply chain partnerships. Our integrated approach delivers both standard products and customized solutions for diverse wind power requirements.
Our metallurgical expertise ensures bearings withstand temperatures up to 500°C while maintaining precision rotation and noise control. This proven performance record makes us your reliable partner for critical wind turbine applications.
Ready to optimize your wind turbine performance with professional bearing solutions? Contact our technical team at auto@lyautobearing.com for detailed specifications and application engineering support.
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