Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Surface Treatment | Heat Treatment，Removal of oxide scale or Customized |
| Weight | 100 KG-7 TON |
| Type | Free Forging |
| Application | Wind Power Turbines |
| Durability | Long-lasting |
| Strength | High |
| Resistance | Corrosion, wear, and impact |
| Production Capacity | Large |
| Cost | Economical |
| Process | Forging &Rough Machining |
| Surface Finish | Rough machined |
| Brand Name | Tian Gong |
| Model Number | TG-173 |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30days | Packaging Details | Pallet |
| Surface Treatment | Heat Treatment，Removal of oxide scale or Customized | Weight | 100 KG-7 TON |
| Type | Free Forging | Application | Wind Power Turbines |
| Durability | Long-lasting | Strength | High |
| Resistance | Corrosion, wear, and impact | Production Capacity | Large |
| Cost | Economical | Process | Forging &Rough Machining |
| Surface Finish | Rough machined | Brand Name | Tian Gong |
| Model Number | TG-173 | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | 18CrNiMo7-6 Free Forging step shaft ，42CrNiMo Free Forging step shaft ，Wind Turbines Forged Step Shaft | ||
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.
| Item | Details |
|---|---|
| Product Name | 42CrMo,42CrNiMo Free Forged Planetary Gear step Shaft for Wind Power Turbines |
| Material Grades | - Alloy steel: 42CrMo - Provides high tensile strength, good hardenability, and excellent fatigue resistance under continuous high-load operation |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - 3600T open-die forging press for long or stepped shaft forgings - Capable of forming precise shaft profiles including stepped ends, flanges, splines, and keyways |
| Manufacturing Process | Hot Forging → Heat Treatment (Quenching + Tempering / Normalizing) → Ultrasonic Testing → Rough / Semi-Finish Machining → Final Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Enhances grain flow alignment along shaft axis for increased impact resistance, torsional strength, and long-term durability |
| Applications | - Planetary gear shafts in wind turbine main gearboxes - Drive shafts for mining, construction, and industrial machinery - Transmission shafts in metallurgical and heavy transport systems |
| Heat Treatment Options | - Quenched + Tempered for high strength and fatigue resistance in dynamic torque transmission - Normalizing for improved grain refinement and dimensional control - Optional stress relief to reduce residual stresses before final machining |
| Testing & Inspection | - Chemical: Composition analysis via spectrometer - Mechanical: Tensile strength, yield strength, hardness, and Charpy impact tests (longitudinal & transverse) - Ultrasonic Testing (UT): 100% internal flaw detection - Dimensional: Runout, straightness, diameter tolerance, and surface roughness control |
| Value-Added Services | - Pre-machining of splines, gear ends, keyways, and journals - Surface finish customization and anti-corrosion protection - Export packaging for long-distance shipment - Full material traceability: heat number, batch number, and certified mechanical & NDT reports |
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.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1994
Total Annual:
27.5 million -28 million
Employee Number:
135~150
Ecer Certification：
Verified Supplier
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 ... 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 ...
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