18CrNiMo, 42CrMo, 42CrNiMo Forged Sun Gear and Sleeve for Wind Turbine Gearbox
We specialize in manufacturing custom forged sun gears and sleeves made from high-performance alloy steels including 18CrNiMo, 42CrMo, and 42CrNiMo, tailored specifically for wind turbine gearbox systems. These components play a critical role in the transmission of torque and rotation within the main drive train of wind energy systems, requiring exceptional strength, toughness, and dimensional precision.
Our forged sun gears and sleeves are produced through open die forging (free forging) and undergo precise heat treatment to ensure optimal mechanical properties, such as:
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High core toughness and fatigue resistance
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Excellent wear resistance after case hardening (for 18CrNiMo)
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Stable grain structure and dimensional accuracy after CNC rough and finish machining
We support part weights from 100 kg up to 7,000 kg, and can forge to customer-provided drawings (OEM) or assist in design and development (ODM).
Each forged part undergoes rigorous quality checks including:
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Ultrasonic testing (UT) per ISO 4992-2
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Brinell hardness testing, tensile and impact tests
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Metallographic analysis for grain size and microstructure
Backed by over 25 years of forging experience, we are a long-term supplier to top wind energy gearbox manufacturers such as Goldwind and NGC, ensuring stable quality, fast delivery, and full certification under ISO 9001 / ISO 14001 / ISO 45001.
Looking for a reliable forged sun gear and sleeve supplier for wind turbine gearboxes? Contact us for technical consultation and customized solutions.
Application Areas
These heavy-duty free forged round bars are essential in industries requiring robust and reliable components:
- Heavy Machinery: Large shafts, axles, pins, and structural components for excavators, cranes, and mining equipment.
- Power Generation: Turbine and generator shafts, rotor components, and other heavy-duty rotating parts.
- Oil & Gas Industry: Drill collars, valve components, pump shafts, and downhole tools.
- Shipbuilding: Propeller shafts, rudder stocks, and other marine power transmission components.
- Gear Manufacturing: Blanks for large industrial gears and pinions.
- Machine Tools: Heavy-duty spindles, arbors, and lead screws.
- Custom Forgings: Ideal for bespoke large-scale industrial components requiring high strength and durability.
| Item |
Details |
| Product Name |
18CrNiMo, 42CrMo,42CrNiMo Feer Forging Steel Round Bar In 100-7000kg Weight Range |
| Material Grades |
- Medium/high-carbon steels engineered for structural strength
- Customized compositions for heavy-load applications |
| Forging Equipment |
- Hydraulic Presses: 5T, 8T, 12T
- Capable of producing large-diameter shaft forgings with directional grain flow |
| Manufacturing Process |
Raw Material Inspection → Preheating → Open Die Forging → Heat Treatment → Rough Machining → Non-Destructive Testing → Final Machining (if required) → Dimensional Inspection → Packaging |
| Forging Ratio |
≥ 3.0 — Ensures enhanced internal density and fatigue resistance for high-stress applications |
| Applications |
- Crusher drive shafts & main shafts
- Crane boom pivot shafts
- Heavy conveyor head/tail shafts
- Hydraulic press spindles
- Compressor crankshafts |
| Delivery Conditions |
- Delivered in heat-treated condition
- Optional: As-forged, stress-relieved, or semi-machined states per requirements |
| Testing & Inspection |
- Chemical Analysis (Optical Spectrometry)
- Mechanical Testing: Tensile, Hardness
- Non-Destructive Testing: Ultrasonic Testing (UT), Magnetic Particle Testing (MT)
- Dimensional inspection |
The steel forgings production flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.
Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.
2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.
3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.
4. What is your production lead time?
With stock: Around 30 days
Without stock: 40–45 days
5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.
Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.
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