In the clean energy and new energy industries, wind turbines, as the core equipment for capturing wind energy, play an absolutely core role in ensuring accurate wind alignment and power transmission through their yaw and main shaft systems. Wind turbines stand in extremely harsh natural environments such as deserts and oceans for long periods, bearing ultra-strong alternating loads of tens of tons while resisting erosion from strong sandstorms and high salt spray. Traditional bearings under such harsh conditions are highly susceptible to fatigue spalling caused by internal impurities, or lubricant drying due to seal failure, leading to catastrophic main shaft fractures or yaw jams. Wind turbine manufacturers urgently need support bearings customized for wind power conditions, featuring ultimate high load capacity, fatigue resistance, and long life.

Facing the stringent wind power industry requirements for "20-year maintenance-free" operation and "extreme reliability," support systems must not only possess excellent impact resistance and heavy-load capacity but also maintain absolute dimensional stability during tens of thousands of hours of continuous operation. Due to insufficient steel purity, non-metallic inclusions in traditional bearings become "invisible killers" of fatigue failure. Furthermore, ordinary heat treatment processes struggle to balance high surface hardness with core impact toughness. The market urgently demands a specialized wind power bearing solution that can break through the dual bottlenecks of material limits and heavy-load fatigue, significantly reducing wind power O&M costs and providing solid protection for the efficient development of the new energy industry.

NMT Wind Turbine Yaw & Main Shaft Bearings are born to conquer the ultimate load challenges of wind power. This series achieves disruptive breakthroughs in materials by adopting a dual purification technology of "vacuum degassing + rare earth micro-alloying," reducing the oxygen content in bearing steel to ≤10ppm and increasing the fatigue limit by 38% compared to ordinary products. Combined with the exclusive "Aote Bailian" heat treatment process, it forms a gradient hardness structure that is "hard on the outside and tough on the inside." The surface hardness reaches HRC62-64 for wear resistance, while the core maintains sufficient toughness to handle impact loads, enabling stable operation in wind power yaw systems for over 20,000 hours. Additionally, NMT optimizes the roller profile and logarithmic curve modification design to ensure uniform distribution of contact stress, completely eliminating edge stress concentration.

In precision manufacturing and quality control, NMT enforces new-energy-grade stringent standards for every component of its wind power bearings. Through high-purity material purification, gradient heat treatment, and precision assembly processes, the fatigue resistance and high-load performance of the bearings are comprehensively improved. NMT ensures that each bearing can effectively resist the huge impact loads and alternating stresses caused by strong winds, avoiding raceway spalling and fractures, guaranteeing high consistency and high reliability of batch products, and completely eliminating operational hazards of wind turbines.

With rich specifications, these bearings are widely used in onshore and offshore wind turbines, wind power yaw systems, wind power main shaft systems, and wind power gearboxes, satisfying the supporting needs of various high-load, fatigue-resistant, extreme-environment-resistant, and long-life transmission nodes.

Core Product Advantages

Dual purification technology of vacuum degassing and rare earth micro-alloying reduces oxygen content to ≤10ppm, increasing the fatigue limit by 38% compared to ordinary products and eliminating micro-spalling;

Exclusive "Aote Bailian" heat treatment process forms a "hard on the outside, tough on the inside" gradient hardness structure with surface hardness reaching HRC62-64 and high core toughness for impact resistance;

Optimized roller profile and logarithmic curve modification design ensure uniform distribution of contact stress, completely eliminating edge stress concentration and reducing friction and wear;

Excellent impact resistance and heavy-load bearing capacity easily handle ultra-strong alternating loads of tens of tons and huge impact forces from sudden extreme gusts;

Full life-cycle ultra-long service life design enables stable operation in wind power yaw systems for over 20,000 hours, significantly reducing high-altitude O&M and replacement costs;

Excellent extreme environment resistance, with high-purity materials and special surface treatments effectively resisting erosion from high salt spray and strong sandstorms, avoiding rust and corrosion fatigue;

Full-process new-energy-grade quality control and 100% performance full inspection ensure precise dimensions and zero fatigue fracture risk for each bearing in wind turbines;

Green energy-saving manufacturing processes significantly reduce the bearing's operating friction coefficient and energy loss of wind turbines, aligning with the green development concept of the new energy industry.

Typical Application Scenarios

Onshore and offshore wind turbines; Wind power yaw and pitch systems; Wind power main shafts and gearboxes; Heavy-duty processing equipment in the new energy industry.

Precision Quality Assurance

NMT Wind Turbine Yaw & Main Shaft Bearings use vacuum-degassed and purified high-carbon chromium bearing steel as core raw materials, subject to strict material purity and fatigue resistance inspections upon incoming. After precision turning, rings undergo "Aote Bailian" special heat treatment and ultra-precision grinding, with strict control over raceway surface roughness and micro-geometric accuracy. Precision rolling elements are fully automatically sorted for size, roundness, and weight to ensure consistent load distribution and friction torque within the same bearing set. All components undergo strict cleaning and precise injection of special grease before assembly. Finished products undergo 100% impact resistance testing, dimensional stability testing, and sealing performance testing. Unqualified products are completely rejected, ensuring the ultimate performance of batch products under extreme conditions such as wind turbines, providing reliable support solutions for new energy equipment.

Product Series

Wind power yaw dedicated four-point contact ball bearings, wind power main shaft dedicated double-row cylindrical roller bearings, wind power gearbox dedicated bearings; Selection is based on ultimate load capacity, fatigue resistance requirements, temperature resistance, and service life.

Brand Strength

NMT is deeply engaged in the R&D and manufacturing of specialized wind power bearings. Targeting industry pain points in wind power scenarios—where internal impurities in traditional bearings trigger fatigue spalling, heavy-load impacts lead to fractures, and extreme environments exacerbate corrosion and wear—NMT continuously optimizes vacuum-degassed purified materials, gradient hardness heat treatment processes, and logarithmic curve modification structures. This effectively solves fatal defects of traditional bearings in wind power equipment such as easy fatigue, short service life, and high O&M costs. It significantly enhances the operational reliability and power generation efficiency of wind turbines, helping high-end wind power equipment manufacturing enterprises break through precision transmission bottlenecks and seize the global new energy equipment intelligent manufacturing market.