42CrMo,42CrNiMo Free Forged Planetary Gear step Shaft for Wind Power Turbines

High-Strength 42CrMo & 42CrNiMo Free Forged Planetary Gear Step Shaft for Wind Power Applications

Looking for reliable and durable forged shafts for wind power turbines? Our Free Forged Planetary Gear Step Shafts are precision-engineered from high-quality 42CrMo and 42CrNiMo alloy steel, ensuring exceptional toughness, fatigue resistance, and long service life even under harsh operating conditions. Widely used in wind turbine gearbox systems, these shafts are critical components in transmitting power efficiently through planetary gear mechanisms.

Manufactured using open die forging (free forging) techniques, our shafts offer superior internal structure, reduced porosity, and improved mechanical performance compared to cast or welded alternatives. The combination of 42CrMo and 42CrNiMo provides excellent hardenability, impact strength, and wear resistance, making them ideal for high-load and continuous operation environments.

Our forged step shafts made from premium 42CrNiMo and 18CrNiMo7-6 alloy steels are designed specifically for wind turbine applications, offering exceptional toughness, fatigue resistance, and dimensional stability.

Utilizing advanced free forging techniques, we manufacture high-performance shafts with excellent internal soundness and superior mechanical properties. All forgings undergo strict quality control, including ultrasonic testing, heat treatment, and precision machining to meet international standards such as EN10228 and ISO9001. Suitable for wind turbine main shafts, gearbox shafts, and generator components, our products are trusted by global wind energy OEMs.

Key Features:

• Materials: 42CrMo / 42CrNiMo

• Forging Type: Free Forged / Open Die Forged

• Applications: Wind turbine planetary gear systems, heavy-duty industrial gearboxes

• Heat Treatment: Normalizing + Tempering / Quenching + Tempering

• Custom machining and non-destructive testing available on request

Our forged planetary gear step shafts meet international quality standards, with strict dimensional control, ultrasonic testing, and surface treatment to ensure performance and reliability. With fast delivery and stable quality, we are a trusted supplier for leading wind energy equipment manufacturers.

42CrMo Free Forged Planetary Gear Shaft for Heavy-Duty Transmission Systems. Our 42CrMo free forged planetary gear shafts are designed for high-performance transmission systems operating under heavy loads, high torque, and continuous duty cycles. Manufactured through precision open-die forging and heat treatment, these shafts offer superior strength, toughness, and dimensional stability essential for critical powertrain components.

The steel forgings production flow:

Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.

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.