Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Application | Offshore Jack-Up Rigs |
| Origin Of Goods | Changzhou, Jiangsu |
| Industry | Free Forging & Open Die Forging |
| Forging Weight | 100kg|100kg-7ton |
| Size | According to the drawings provided by customers |
| Resistance | Corrosion and Wear |
| Product Type | Forged Gear，Rough machining of gears |
| Durability | durable |
| UT | Optional level ，Comprehensive testing |
| Brand Name | Tiangong |
| Model Number | TG-189 |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
View Detail Information
Explore similar products
100kg To 7000kgs Forged Gear Steels , steel disc For Industry Gearboxes
Forged Gears For Industrial Gearboxes, Transmissions, Large Industrial
Free Forging Forged Gear Alloy For Construction Equipment Reducers
18CrNiMo7-6,4140, 42CrMo4 Carbon Steel Alloy Steel for Industrial Gears Drive
Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30days | Packaging Details | Pallet |
| Application | Offshore Jack-Up Rigs | Origin Of Goods | Changzhou, Jiangsu |
| Industry | Free Forging & Open Die Forging | Forging Weight | 100kg|100kg-7ton |
| Size | According to the drawings provided by customers | Resistance | Corrosion and Wear |
| Product Type | Forged Gear，Rough machining of gears | Durability | durable |
| UT | Optional level ，Comprehensive testing | Brand Name | Tiangong |
| Model Number | TG-189 | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | high-torque forged gears ，offshore jack-up rig gears ，forged gears with warranty | ||
High-Torque Forged Gears for Offshore Jack-Up Rigs
High-torque forged gears are engineered to deliver exceptional strength, durability, and reliability under the most demanding offshore conditions. Manufactured from premium alloy steels such as 42CrMo4 and 18CrNiMo7-6, these gears undergo precision forging, heat treatment, and rigorous quality inspections to ensure superior fatigue resistance and long service life.
Key Features:
Exceptional load-bearing capacity and high torque transmission efficiency.
Optimized material properties for superior wear resistance and toughness.
Precision forging and machining for tight dimensional accuracy and smooth operation.
Heat-treated for enhanced hardness and resistance to harsh marine environments.
Applications:
These forged gears are widely used in offshore jack-up rigs, particularly in elevating and positioning systems such as rack and pinion drives, gearboxes, and lifting mechanisms. Their robustness ensures safe and efficient operations in oil & gas exploration, drilling platforms, and other heavy-duty offshore equipment.
| Item | Details |
|---|---|
| Product Name | High-Torque Forged Gears for Offshore Jack-Up Rigs |
| Material Grades | - 42CrMo4, 18CrNiMo7-6, 30CrNiMo8 alloy steels for high strength and toughness - Materials selected for corrosion resistance, fatigue strength, and high torque demands in marine environments |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Open die and closed die forging capabilities for large-diameter, heavy-duty gears used in offshore lifting systems |
| Manufacturing Process | Forging → Normalizing/Quenching & Tempering → Rough Machining → Gear Hobbing/Shaping → Heat Treatment (Carburizing/Induction Hardening) → Final Machining → Dimensional & Non-Destructive Inspection |
| Forging Ratio | ≥ 3.5 — Provides refined grain structure, excellent strength-to-weight ratio, and superior fatigue resistance under cyclic offshore loads |
| Heat Treatment Options | - Carburizing + Quenching + Tempering for hardened gear teeth and tough gear core - Induction hardening for selective reinforcement of load-bearing areas - Optional surface treatments to improve saltwater corrosion resistance |
| Applications | - Rack and pinion drive gears for jack-up rig elevating systems - High-torque gear transmission for offshore drilling platforms - Lifting and positioning systems in marine heavy equipment |
| Process Compliance | Manufactured in line with API, ABS, or customer-specific offshore engineering standards, ensuring reliability in extreme marine environments |
| Delivery Conditions | - Heat treated, supplied as rough-machined blanks or fully finished gears - Optional surface hardening and anti-corrosion coatings for offshore conditions |
| Testing & Inspection | - Chemical Composition Analysis - Mechanical Properties: Yield Strength, Tensile Strength, Impact Toughness, Hardness - Non-Destructive Testing: UT, MT, Surface Crack Detection - Dimensional Accuracy and Gear Profile Inspection |
Process flow:
Raw material verification → material unloading → dimensional & surface inspection → controlled preheating → forging operation → heat treatment process → in-process inspection → rough machining → non-destructive examination → final inspection → protective packaging → shipment.
Frequently Asked Questions (FAQs)
1. What is your forging capacity?
We manufacture forged components from 100 kg up to 7,000 kg, covering both mid-size and heavy-duty applications.
2. Do you also handle heat treatment and machining?
Yes, we provide complete in-house services including heat treatment, rough machining, and precision finish machining.
3. Which industries do you mainly serve?
Our forged products are widely used in wind power, heavy equipment, port machinery, transmission systems, and other industrial sectors.
4. What is your typical production lead time?
With stock: Approximately 30 days
Without stock: 40–45 days depending on complexity and order volume
5. Where is your factory located?
We are based in Changzhou City, close to Shanghai, with convenient logistics and shipments via Shanghai Port.
Request a Quote
Kindly send us your technical drawings and detailed requirements. Our engineering team will evaluate them and provide you with a tailored quotation and solution promptly.
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 ...
Get in touch with us
Leave a Message, we will call you back quickly!