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 |
| Material | 42CrMo or Customized |
| Weight | 100 KG-7 TON |
| Type | Free Forging |
| Application | Heavy-Duty Transmission Systems |
| Packing | Pallet or Customized |
| Shape | Customizable |
| Durability | Long-lasting |
| Brand Name | Tian Gong |
| 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 | Material | 42CrMo or Customized |
| Weight | 100 KG-7 TON | Type | Free Forging |
| Application | Heavy-Duty Transmission Systems | Packing | Pallet or Customized |
| Shape | Customizable | Durability | Long-lasting |
| Brand Name | Tian Gong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | 100KG Free forging part ，7000kg Free forging component ，Heavy Duty Planetary Gear Shaft | ||
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.
Key Features:
Material: Made from premium 42CrMo alloy steel, offering high tensile strength, excellent hardenability, and outstanding fatigue resistance.
Forging Process: Open-die free forging ensures directional grain flow, minimizing internal defects and enhancing mechanical performance.
Heat Treatment: Quenched and tempered to achieve optimal hardness, toughness, and wear resistance; stress-relief annealing available for added dimensional control.
Machinability: Rough or semi-finished machining available for gear spline, shaft ends, and bearing interfaces to meet specific design requirements.
Forging Ratio: ≥ 3.0 — critical for high fatigue strength in rotating applications.
Applications:
Planetary gear systems in wind turbine gearboxes
Heavy-duty transmission systems in mining, construction, and industrial equipment
Drive components in off-highway vehicles and metallurgical machinery
| Item | Details |
|---|---|
| Product Name | 42CrMo Free Forged Planetary Gear Shaft for Heavy-Duty Transmission Systems |
| 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 |
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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