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T: +86-13955534080
E: salesb@masfy.com
E: salesb@masfy.com
West ChaoShan Road, Economic and Technical Development Zone, Maanshan,Anhui,China
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With a slewing center diameter of φ3373 mm, this bearing features a compact structure, ultra-high rigidity, and exceptional load-bearing capacity, delivering precise, reliable pitch adjustment for wind turbine blades to optimize power generation efficiency and ensure operational safety in extreme weather conditions. Tailored for wind turbine original equipment manufacturers, wind farm operation and maintenance service providers, and new energy project developers, this slewing ring meets the strictest industry standards for long service life and low maintenance requirements in harsh wind farm environments.
Core Parameter | Detailed Specification |
Product Model | 133.48.3373F |
Slewing Center Diameter | φ3373 mm |
Outer Diameter | 3670 mm |
Inner Diameter | 3011.2 mm |
Total Assembly Height | 215 mm |
Bearing Type | Three Row Roller Slewing Bearing |
Core Design | Zero Clearance Structure |
Sealing System | Four-lip Sealing Structure |
Cage Material | Segmented POM |
Primary Application | 7MW Wind Turbine Pitch Control System |
This 7MW wind turbine slewing ring adopts a three row roller structure with zero clearance design, which significantly improves radial and axial load-bearing capacity and overturning moment resistance, ensuring stable blade pitch adjustment even under extreme wind loads. The compact structure fits perfectly into the limited installation space of wind turbine hubs, optimizing the overall layout of the pitch system.
Rollers are processed with logarithmic modification, eliminating edge stress effects and improving contact fatigue life to meet the 20+ year design service life requirement for wind power equipment. The segmented POM material cage delivers excellent impact resistance, fatigue resistance, and creep resistance, maintaining stable performance in long-term cyclic operation. The four-lip sealing structure provides superior airtightness, blocking moisture, salt spray, and dust ingress, especially critical for offshore wind farm applications.
This wind power pitch control slewing bearing is purpose-built for 7MW onshore and offshore wind turbine pitch systems, and can also be adapted to 7MW class wind turbine yaw systems with matching load requirements. It is widely used in onshore high-altitude wind farms, low-wind speed inland projects, and high-salt spray offshore wind farms, serving the full lifecycle of new energy projects from initial equipment manufacturing to long-term operation and maintenance.
Installation of the 133.48.3373F slewing bearing must be performed by a professional technical team, with pre-installation inspection of dimensional accuracy, surface finish, and seal integrity. Mounting bolts must be tightened in a cross sequence with calibrated pre-tightening torque to ensure uniform stress distribution. During operation, perform lubricant replenishment every 6 months, and conduct annual inspections of seal condition, roller wear, and bolt pre-tightening force. For offshore applications, add regular anti-corrosion inspections and treatments to adapt to high-salt spray environments.
We provide end-to-end customized solutions for wind turbine manufacturers, wind farm operators, and new energy project developers, including custom structural adjustments, anti-corrosion material upgrades for offshore applications, optimized sealing systems for extreme environments, and full-process technical validation for non-standard wind turbine platforms. For bulk procurement and long-term framework agreements, we offer tiered pricing, fixed lead time commitments, dedicated project technical support, on-site installation guidance, and joint spare parts inventory planning to reduce operational and maintenance costs.
Yes, the four-lip sealing structure, anti-corrosion material options, and high-rigidity design are fully optimized for the high-salt spray, high-humidity environment of offshore wind farms.
The bearing is designed and tested to meet the wind power industry standard of 20+ years of continuous service life under rated working conditions.
Yes, our engineering team offers full custom development services, from parameter adjustment to prototype testing, to match the specific requirements of different wind turbine platforms.
+86-13955534080 
