Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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The Large Module Hardened Forged Turbine Gear for Wind Turbine Transmission Units is engineered to deliver exceptional torque transmission and durability in utility-scale wind turbine gearboxes. Manufactured from premium alloy steels such as 18CrNiMo7-6 or 42CrMo4, each gear is precision forged and heat treated to ensure optimal surface hardness, core toughness, and fatigue resistance.
Large Module Hardened Forged Gear for Wind Turbine Transmission Units. Featuring large module design, these forged gears are specifically tailored to handle high-load, low-speed wind turbine drive conditions. The gear surfaces undergo case hardening or through hardening processes to achieve superior wear resistance and long service life under fluctuating loads and challenging environmental conditions.
Typical applications include main stage transmission gears, yaw drive gears, and pitch control gears in both onshore and offshore wind turbines. All gears are manufactured in accordance with international standards.
| Item | Details |
|---|---|
| Product Name | Large Module Hardened Forged Gear for Wind Turbine Transmission Units |
| Material Grades | - Alloy Steels: 18CrNiMo7-6, 42CrMo4,and more |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Open die forging of large gear blanks |
| Manufacturing Process | Forging → Heat Treatment → Rough Machining → Gear Hobbing/Shaping → Gear Grinding (if required) → Final Machining → NDT & Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Ensures uniform grain flow, improved internal integrity, and excellent mechanical strength under wind turbine gearbox loads |
| Gear Hardening Options | -Normalizing and Tempering |
| Applications | - Large-module transmission gears for main wind turbine gearboxes - Yaw and pitch drive gears in high-load systems - Onshore and offshore turbine drive trains |
| Process Compliance | Supports customer drawings and technical specifications |
| Delivery Conditions | - Q+T (Quenched + Tempered) for core strength - Case-hardened or carburized for wear resistance |
| Testing & Inspection | - Chemical Analysis: Optical Emission Spectrometry - Mechanical Tests: Tensile , Charpy Impact - Hardness: Brinell/Rockwell - NDT: UT, MT - Tooth Profile, Lead, Pitch & Runout: Precision gear measuring instruments |
Large Module Design
Engineered for high-torque, low-speed applications common in wind turbine transmissions, enabling robust load-carrying capacity.
High-Strength Forged Alloy Steel
Produced from premium grades like 18CrNiMo7-6 and 42CrMo4, ensuring excellent toughness, fatigue resistance, and internal soundness.
Advanced Heat Treatment
Hardened via carburizing or quenching & tempering processes to achieve high surface hardness and deep case depth for long wear life.
Precision Machining
CNC finish machining ensures gear tooth accuracy, providing smooth transmission and reduced vibration.
Customizable Dimensions
Support for large outer diameters and tailored profiles based on gearbox requirements.
Inspection & Traceability
100% UT/MT/NDT tested, mechanical property verified.
Wind Turbine Gearboxes
Used in main transmission stages of utility-scale wind turbines (onshore & offshore) to handle variable wind loads and long maintenance intervals.
Yaw Drive and Pitch Control Systems
Applied in yaw and pitch mechanisms for controlling nacelle orientation and blade angle, ensuring turbine efficiency and safety.
Heavy-Duty Industrial Gearboxes
Applicable to large-scale industrial reducers requiring high durability and rotational stability under heavy or cyclic loads.
Process 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.