In the grand process of global energy transition towards green and low-carbon development, large-scale wind turbines serve as the "absolute main force" for capturing natural wind energy and achieving green power generation. As wind turbines continuously expand into deep-sea and high-latitude extreme-cold regions, the yaw and pitch systems, acting as the unit's "rudder" and "wind-facing angle adjuster," must maintain smooth operation and ultra-high fatigue resistance in extreme environments of -45℃ extreme cold, strong wind load impacts, and high salt spray corrosion. However, traditional bearings are highly susceptible to jamming and failure due to grease freezing and material cold embrittlement in extreme cold. Meanwhile, under complex alternating wind loads, raceway surfaces are prone to fretting wear and fatigue spalling, leading to expensive turbine downtime. Wind turbine OEMs urgently need support bearings customized for extreme climates, featuring ultimate extreme-cold resistance, high fatigue resistance, and long-life characteristics.

Facing the stringent wind power industry standards for "20-year maintenance-free" and "zero unplanned downtime," support systems must not only possess low-temperature toughness that breaks through material limits but also maintain absolute dimensional stability and sealing reliability under long-term strong convection impacts. Due to the easy aging and failure of sealing structures under extreme temperature differences, traditional bearings allow snow, ice, and salt spray to intrude, triggering abrasive wear. Furthermore, ordinary greases easily harden and leak in extreme cold, directly causing dry friction and catastrophic damage. The market urgently demands a wind power yaw and pitch bearing solution that can break through the dual bottlenecks of extreme-cold jamming and fatigue spalling, achieving full life-cycle high-reliability operation and providing solid protection for the efficient output of clean energy.

NMT Wind Power Yaw & Pitch Bearings are born to conquer the ultimate challenges of extreme climates and complex loads. This series achieves disruptive breakthroughs in materials science and sealing technology. The core rings and rolling elements comprehensively use high-purity vacuum degassed bearing steel, combined with a special ultra-low-temperature cryogenic treatment process, endowing the material with the excellent trait of maintaining extremely high toughness and impact strength within a wide temperature range of -45℃ to 155℃. For high fatigue resistance and long life, NMT innovatively introduces an "ultra-long-life grease + multi-layer composite seal" design. The special long-life grease maintains excellent fluidity and oil film strength even in extreme cold, fundamentally eliminating fretting wear. Meanwhile, medium-frequency induction quenching and precision grinding processes are adopted for raceway surfaces, significantly improving surface hardness and residual compressive stress to effectively resist fatigue spalling under strong wind alternating loads.

In precision manufacturing and quality control, NMT enforces wind-power-grade stringent standards for every component of its wind power bearings. Through ultra-low-temperature cryogenic treatment, multi-layer composite seal design, and full-process quality control, the extreme-cold resistance and long-life performance of the bearings are comprehensively improved. NMT ensures that each bearing maintains an ultra-low wear rate and extremely high operational smoothness under extreme conditions of extreme cold and strong wind alternating loads, avoiding turbine downtime and high O&M costs, guaranteeing high consistency and high reliability of batch products, and completely eliminating early failure hazards of wind power equipment.

With rich specifications, these bearings are widely used in yaw systems and pitch systems of onshore and offshore large-scale wind turbines, wind turbine main shafts, and gearboxes, satisfying the supporting needs of various extreme-cold resistant, high-fatigue resistant, long-life, and maintenance-free transmission nodes.

Core Product Advantages

Core rings and rolling elements use high-purity vacuum degassed bearing steel, combined with special ultra-low-temperature cryogenic treatment, endowing the excellent trait of maintaining extremely high toughness and impact strength within a wide temperature range of -45℃ to 155℃;

Innovative "special long-life grease + multi-layer composite seal" design ensures excellent grease fluidity and oil film strength in extreme cold, fundamentally eliminating fretting wear and extreme-cold jamming;

Medium-frequency induction quenching and precision grinding for raceway surfaces significantly improve surface hardness and residual compressive stress, effectively resisting fatigue spalling and plastic deformation under strong wind alternating loads;

Excellent extreme-cold resistance and high fatigue resistance maintain ultra-low wear rate and structural integrity under typhoon-level strong wind and extreme-cold temperature difference alternating impacts, ensuring 20-year maintenance-free operation of wind turbines;

Ultimate multi-layer sealing protection uses high/low-temperature resistant FKM seals and labyrinth dust-proof design to thoroughly block the intrusion of snow, ice, dust, and high salt spray, ensuring absolute purity of the internal lubrication environment;

High-purity special materials and optimized internal contact stress distribution significantly reduce crack propagation risks under long-term alternating loads, achieving ultra-long service cycles for core wind power components;

Full life-cycle high-reliability design significantly reduces downtime maintenance frequency and high-altitude operation risks for wind turbines, ensuring efficient, safe, and continuous output of clean energy;

Full-process wind-power-grade quality control and 100% non-destructive testing and low-temperature performance full inspection ensure precise dimensions, zero jamming, and zero catastrophic failure risks for each bearing in yaw and pitch systems.

Typical Application Scenarios

Yaw systems of onshore and offshore large-scale wind turbines; Wind turbine pitch systems and main shafts; Wind power gearboxes and speed increasers; High-latitude extreme-cold regions and high-salt-spray coastal wind farms.

Precision Quality Assurance

NMT Wind Power Yaw & Pitch Bearings use high-purity vacuum degassed bearing steel as core raw materials, subject to strict material purity, microstructure, and low-temperature impact toughness inspections upon incoming. After precision turning, rings undergo special ultra-low-temperature cryogenic treatment and medium-frequency induction quenching on raceway surfaces, with strict control over raceway surface hardness, hardened layer depth, and residual compressive stress. Precision rolling elements are fully automatically sorted for size, roundness, and weight to ensure consistent load distribution within the same bearing set. All components undergo precision matching and assembly in high-grade cleanrooms, with precise injection of special long-life grease. Finished products undergo 100% rotational precision, non-destructive testing, and extreme-cold environment simulation testing. Unqualified products are completely rejected, ensuring the ultimate performance of batch products under extreme conditions such as wind power equipment, providing reliable support solutions for clean energy equipment.

Product Series

Wind power yaw system dedicated large slewing bearings, pitch system dedicated high-precision bearings, wind turbine main shaft dedicated cylindrical roller bearings; Selection is based on temperature resistance levels, load capacity, fatigue life, and sealing requirements.

Brand Strength

NMT is deeply engaged in the R&D and manufacturing of wind power yaw and pitch bearings. Targeting industry pain points in extreme climate scenarios—where traditional bearings suffer grease freezing and jamming in extreme cold, strong wind alternating loads cause raceway fatigue spalling, and seal failure triggers snow, ice, and salt spray intrusion—NMT continuously optimizes ultra-low-temperature cryogenic heat treatment technologies, multi-layer composite seal structures, and special long-life lubrication technologies. This effectively solves fatal defects of traditional bearings in wind power equipment such as easy extreme-cold jamming, weak fatigue resistance, and short life. It significantly enhances the operational reliability and maintenance-free cycle of wind turbines, helping high-end wind power equipment manufacturing enterprises break through precision transmission bottlenecks and seize the global green energy intelligent manufacturing market.