Wind Turbine Hub Casting and Machining
Heavy-Duty Hub Fabrication for Wind Energy Systems
Openex is a trusted manufacturer of large-scale wind turbine hubs, offering a complete solution from mold design and casting to high-precision CNC machining, surface finishing, and quality assurance. Our manufacturing capabilities support both onshore and offshore wind power projects with components engineered to endure high dynamic loads, vibration, and environmental exposure.
Our wind turbine hubs — weighing up to 40 tons — are cast from premium ductile iron or alloyed steel, heat-treated for structural integrity, and machined to tight tolerances for seamless nacelle integration. Each hub is inspected and certified to meet global OEM and EPC specifications.
Complete Hub Manufacturing Process
- Mold Design & Casting: Advanced pattern-making and controlled pouring for structural uniformity
- Heat Treatment: Stress relieving and normalizing to enhance material toughness
- Rough & Finish Machining: Multi-axis CNC turning and boring up to 6 m diameter
- Drilling & Tapping: High-precision bolt hole placement with thread validation
- Dynamic Balancing: To ensure rotational performance and reduce nacelle stress
- Coating: Anti-corrosive primer, topcoat, and customized protective finishes
Technical Capabilities
- Hub Weight Capacity: Up to 40 tons per casting
- Machining Tolerance: ±0.01 mm on critical interfaces
- Max Turning Diameter: 6 meters
- Surface Coating: marine-grade coating system for offshore applications
Other Wind Components We Produce
- Precision Flanges: For tower-tube connections and nacelle base flanges
- Tower Segments: Cut, rolled, welded, and blasted steel shell segments
- Monopiles & Pile Tips: Heavy-wall offshore foundations
- Suction Buckets: Fabricated and machined for subsea installation
- Transition Pieces & Platforms: Structural nodes and bracing elements
Inspection & Quality Assurance
- Ultrasonic Testing (UT) & Radiographic Testing (RT) for internal flaw detection
- Magnetic Particle (MT) and Liquid Penetrant (PT) surface testing
- 3D CMM inspection & laser scanning for geometric accuracy
- Mechanical property validation (tensile, impact, Brinell hardness)
- Material traceability and full MTR documentation
Why Choose Openex?
- Integrated large-part casting, machining, and coating facility
- Proven experience delivering to leading wind OEMs and EPCs
- Capacity for high-volume, high-mix production of wind energy structures
- Compliance with ISO 9001, CE, and wind industry-specific QA standards
Contact Openex
Let us support your next wind power project. Reach out for tailored casting and machining services for wind turbine hubs, flanges, monopiles, and more.
📧 Email: [email protected]
📞 Phone: +86 186 5928 0806
Our Full-Service Metal Fabrication: metal cutting and sheering, metal forming, bending, and rolling, welding, CNC machining, sheet metal assembly, and quality inspection
Machining Services: Multi-Axis Machining, 5-Axis Machining, CNC Milling | Vertical and Horizontal, CNC Turning | Vertical and Horizontal, CNC Engineering, CMM Inspection
Material Types: castings, forgings, fabricated weldments, billets, bar stock, and plate
Metal Materials we worked: Stainless steel, Carbon Steel, aluminum, brass, bronze, chromium, copper, Monel, nickel, titanium, zinc, and many other superalloys.
Certifications: ISO 9001, CE EN 1090-1, ISO 3834, ABS, AWS, API, ASME, DNV.GL.
Industries Served: Mining, Construction, Oil & Gas, Power Generation, Marine, Automotive, Renewable Energy, Pulp & Paper, Bridge, Aerospace, Defense, Printing and Dyeing, Machinery, etc.