Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | ,T/T |
| Supply Ability | 56000Tons |
| Delivery Time | 30 days |
| Packaging Details | Pallet |
| Material | 42CrMo4, 18CrNiMo7-6,20CrMo,20CrMnMo and more |
| Shape | According to the drawing,Customizable |
| Corrosion Resistance | Yes,apply rust-preventive oil to the surface |
| Customization Options | Available |
| Size | Customizable |
| Durability | Wear-resistant |
| Precision | As requested |
| Usage | Offshore Drilling Equipment |
| Brand Name | Tiangong |
| Model Number | TG-224 |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | ,T/T | Supply Ability | 56000Tons |
| Delivery Time | 30 days | Packaging Details | Pallet |
| Material | 42CrMo4, 18CrNiMo7-6,20CrMo,20CrMnMo and more | Shape | According to the drawing,Customizable |
| Corrosion Resistance | Yes,apply rust-preventive oil to the surface | Customization Options | Available |
| Size | Customizable | Durability | Wear-resistant |
| Precision | As requested | Usage | Offshore Drilling Equipment |
| Brand Name | Tiangong | Model Number | TG-224 |
| Certification | ISO9001, ISO14001,ISO45001 | Place of Origin | Changzhou, China |
| High Light | forged shaft marine propulsion ，marine coupling assembly shaft ，forged shaft with warranty | ||
Forged Shaft for Marine Propulsion System Coupling Assemblies
This forged shaft is specially designed for marine propulsion system coupling assemblies, delivering high reliability, excellent mechanical strength, and long-term stability under harsh offshore operating conditions. Produced through precision forging and controlled heat-treatment processes, each shaft provides superior internal soundness, enhanced fatigue resistance, and consistent dimensional accuracy, ensuring smooth and efficient power transmission in marine environments.
Product Features
High Torsional Strength and Load Capacity – Forged alloy steel construction provides exceptional resistance to torsional stress and shock loads during propulsion transmission.
Superior Fatigue and Impact Resistance – Optimized forging structure and quenching/tempering treatment ensure durability in continuous marine operation.
Precision Machining Accuracy – Tight machining tolerances guarantee precise alignment with propulsion couplings and stable rotational performance.
Material Options – Available in 42CrMo, 20CrMo, 18CrNiMo7-6, or customized marine-grade alloy steels depending on propulsion system requirements.
Corrosion-Resistant Solutions – Optional surface treatments and corrosion-resistant materials are offered to enhance performance in seawater environments.
Applications
Marine propulsion system coupling shafts for cargo vessels, commercial ships, and offshore service vessels
Power transmission assemblies in tugboats, bulk carriers, and marine engineering equipment
Drive-line components in continuous-duty propulsion systems requiring stable torque transfer and long service life
This forged shaft is an ideal choice for shipbuilders and marine equipment manufacturers seeking high-performance, long-lasting propulsion components capable of operating reliably under heavy mechanical loads and challenging marine conditions.
| Item | Details (Forged Shaft for Marine Propulsion System Coupling Assemblies) |
|---|---|
| Available Materials | 42CrMo4, 20CrMo, 18CrNiMo7-6, customized marine-grade alloy steels — selected for high torsional strength, corrosion resistance, and long-term stability in offshore propulsion systems. |
| Forging Equipment | Open-die hydraulic hammers: 5T / 8T / 12T — ideal for long, stepped, or spline shafts, achieving directional grain flow for superior fatigue performance and shock resistance. |
| Application Field | Designed for marine propulsion coupling assemblies in cargo vessels, offshore support vessels, tugboats, bulk carriers, and marine engineering equipment — ensuring reliable torque transmission in high-humidity and saltwater environments. |
| Manufacturing Process | Forging → Heat Treatment (Quenching + Tempering or Normalizing) → Rough Machining → Precision Machining (if required) → Straightening → Stress Relief → Dimensional and Surface Inspection — ensuring stability, concentricity, and accurate coupling fit. |
| Forging Ratio | ≥ 3.0 — enhances grain refinement, improves torsional endurance, and provides long service life under continuous marine propulsion loads. |
| Delivery Condition | Delivered as rough-machined or fully machined shafts, with optional anti-corrosion coatings, induction hardening, and marine-grade surface protection. |
| Testing & Inspection | Full inspection including chemical analysis, ultrasonic testing (UT), magnetic particle testing (MT), mechanical tests (tensile, impact), hardness checks, runout measurement, and coupling-end dimensional verification. |
| Integrated Services | End-to-end solutions from forging, heat treatment, precision machining, NDT inspection, anti-corrosion protection, packaging, and port-side delivery — fully compliant with marine industry standards and customer requirements. |
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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