Large Module Hardened Forge Cast Iron Turbine Gear For Wind Turbine Transmission Units

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.

Product Features:

• 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.

Applications:

• 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.

About CHANGZHOU TIANGONG

We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet our customers’ requirements.

Our customers and partner value our products and services for 2 reasons: excellence and reliability.

Key figures

A. Over 30 years professional free forging manufacturing experience

B. The company covers an area of 71,000 square meters

C. The construction area of the production workshop is 12,000 square meters

D. Total number of employees of 158

E. 28 engineering and technical personnel

F. 59 skilled workers

G. Annual production capacity is 38,000 tons

H. Steel throughput can reach 56,000 tons

Efficient and reliable solutions for customers

Industrial sector application

We design and manufacture forged parts for all industrial areas applying our experience and unique professionalism and taking the specific requirements of the markets into account. This has led us to become a forging industry leader in all industrial segments and collaborating with leading companies.

A. Wind power generation

B. Port Heavy Machinery

C. Mining

D. Ship Building

E. Chemical industrial

F. Oil industrial

G. Metallurgical industry

H. Hydraulic industry

I. Other high-end industrial equipment, gearbox body, parts and etc.

Customized solutions

Modular processes allow us to engineer a solution for almost every industrial application requiring free forged parts. Our modularity means flexibility, a wide range of options, faster delivery, and most important of all, competitiveness.

All our products and production process have been designed to assure excellent, reliable and long lasting unique mechanical performances, resulting in reduced operating costs and long life.

With a wide range of products and a significant experience gained in most industrial applications, we can also provide complete engineering recommendation for customers.