Long Shaft Heavy Duty Industrial Gearbox for Metallurgical Machinery
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Product Highlights
- High Precision Gear Accuracy: Core gears reach ISO level 5/DIN level 6; foil mill gears can achieve ISO level 4.
- Customizable Gear Ratio: Gear ratio ranges from 5:1 to 100:1 and can be customized to specific needs.
- Non-Standard Customization: Full process customization from design to debugging for casting and foil mills.
- Robust Material Construction: Alloy steel gears paired with cast iron housing for durability.
- Flexible Delivery Options: 7-15 days for standard models; 20-45 days for customized models via sea, air, or land.
- Comprehensive After-Sales Support: Free replacement for transport damage, plus installation guidance and technical support.
Product Attributes
- Customization
- Available
- Application
- Machinery
- Hardness
- Hardened Tooth Surface
- Model NO.
- Custom
- Installation
- Base Mount
- Layout
- Horizontal Layout
- Gear Shape
- Helical Gear
- Step
- Three-Step
- Type
- Heavy Duty Gear Reducer
- Model Range
- Custom
- Service Life
- ≥10 Years/20000 Hours
- Certification
- ISO9001
- Transport Package
- Wooden Case
- Specification
- Torque: 5000N·m~4200kN·m Ratio: 5: 1-100: 1 Spee
- Trademark
- TongJi
- Origin
- Henan, China
- Package Size
- 130.00cm * 90.00cm * 90.00cm
- Package Gross Weight
- 550.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Long Shaft Heavy Duty Industrial Gearbox for Metallurgical Machinery
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Product Description

Model | Kds Series/Customized Model |
Gear Ratio | 5:1-100:1(Can be customized) |
Torque Capacity | ≥500 N·m(According to the product) |
Input Speed | ≤3000 r/min |
Precision Grade | ISO 5/DIN 6 (high precision gear accuracy) |
Application | Casting and rolling mill, cold and hot rolling mill, foil rolling mill, drawing and bending straightening machine |
Material | Alloy steel (gear), cast iron (box) |
Lubrication | Oil bath/forced lubrication |

Q2: How long is the service life of the reducer under the working condition of the rolling mill?






About the Supplier
This supplier has been audited by CTI. Verify the report on the official CTI website with ID "QIP-ASI2591668". Items marked "" are certified.
Company Profile
Henan Tongji Gearbox Co., Ltd. (Brand: Tongji Reducer) was founded in 2016, with a registered capital of RMB 15.8 million and a factory spanning 36, 000 square meters. We specialize in the R&D and manufacturing of high-precision gears, speed reducers, non-standard gearboxes, expansion and contraction reels, couplings, and complete sets of rolling mill equipment.
Manufacturing Capability
Our factory is equipped with over 30 advanced CNC machine tools from both domestic and international suppliers, including:
CNC gear hobbing machines
CNC gear shaping machines
CNC gear grinding machines
Double-chamber vacuum carbonitriding furnaces
Precision CNC vertical and horizontal machining centers
Gantry-type machining centers
Robotic intelligent production lines
Large-scale laser cladding equipment
1, 000-ton horizontal press
We hold independent export rights and currently export to 8 countries. Our heaviest single gearbox ever produced weighed 139 metric tons - a testament to our large-scale manufacturing capability.
In 2022, we implemented a Kingdee ERP management system with barcode tracking across all production nodes - enabling real-time visibility from supply chain to production, sales, finance, and inventory. This drives lean manufacturing, smart workshop management, and intelligent decision-making throughout the organization.
Certifications & Industry Recognition
Certification / Recognition Year
ISO 9001 Quality Management System 2018
National High-Tech Enterprise 2020
Henan Province SRDI Enterprise (Specialized, Refined, Differential, Innovative) 2022
Henan Provincial Intelligent Workshop 2024
Integration of Informatization and Industrialization (III) Compliance 2024
Industry Memberships:
Member - China General Machinery Industry Association
Governing Board Member - China Gear Industry Association
Governing Board Member - Henan Gear Alliance Association
R&D & Standards
We are an active contributor to industry standards, serving as a drafting and formulation unit for:
2 National Standards: Technical Specifications for Accelerated Fatigue Life Testing of Heavy-Duty Gearboxes; Calculation of Secondary Load Capacity of Gears and Worm Wheels
3 Industry Standards: General Technical Requirements for Modular Electric Reducers; General Technical Specifications for HB Vertical & Parallel Shaft Gearboxes; Precision Dual-Lead Worm Gear Reducers
Our in-house R&D center - the Jiaozuo Tongji Transmission Technology R&D Center and Henan High-Precision Gear Transmission Equipment Engineering Technology Research Center - has produced:
4 invention patents
39 utility model patents
5 registered trademarks
Key Clients & Market Position
Through our strategic partnership with Geely Holdings, we have built a strong client network of over 130 enterprises in the aluminum processing industry, including major names such as Mingtai Aluminum, Mingdao Aluminum, Dingsheng New Energy, and Wanda Aluminum.
We also serve state-owned groups and industry giants including CHINALCO, Sinosteel, China Construction Machinery, Northern Heavy Industry, and China Minmetals.
Our domestic market share in our core sub-sector has reached 13.6%. We are now actively expanding into international markets and welcome global partnerships.
Why Work With Tongji?
One-stop custom solution - from design to manufacturing to after-sales, all in-house
Proven quality - ISO 9001 certified, national standards contributor, SRDI enterprise
Non-standard expertise - if you need a gearbox that doesn't exist yet, we'll build it
Export-ready - independent export rights, experience shipping to 8 countries
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Jiaozuo, Henan, China
-
Plant Area
- 6727.5 square meters
-
Number of Employees
- 65
-
Terms of Payment
- Small-amount payment, Western Union, PayPal, D/P, T/T, LC
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month, 1-3 months, 3-6 months
Off Season Lead Time: one month, 1-3 months, 3-6 months -
Nearest Port
- Qingdao Port
-
Minimum Order Quantity
- 1 unit
-
Supply Chain Partners
- 17
Our Production Capability & Technical Expertise
- Main Products
- Reducer, Cold(Hot)Rolling Mill, Casting and Rolling Mill, Non-Standard Gearbox, Expansion and Contraction Scroll, Coaling, High-Precision Gears, Foil Rolling Mill, Bending Straightening Machine
-
Production Lines
- 1
-
Production Machines
- Horizontal Lathe, Welding Machine, Boring Machine, Milling Machine, Vertical Lathe, High-Frequency Quenching, Carbon Nitrogen co Infiltration Furnace, CNC Lathe, Gear Hobbing Machine, Gear Shaping Machine, Gear Shaping Machine, Cylindrical Grinding
-
QA/QC inspectors
- 2 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 1 people
-
Traceability of Raw Materials
- Yes
-
Own Brand
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2016-09-21
-
Export Year
- 1 year
-
Main Markets
- Domestic
-
Repeat Buyers Choice
- 80%~100%
-
Number of Foreign Trading Staff
- 6
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015, ISO45001:2018, ISO14001
FAQ
- What level of gear accuracy can the gears of the matching reducer of the rolling mill reach?
- The accuracy of the core transmission gear can reach ISO level 5/DIN level 6, and the supporting gears of some high-precision foil rolling mills can achieve ISO level 4 to meet the high-precision transmission needs of rolling equipment.
- Can you customize the non-standard reducer to adapt to the casting mill/foil mill?
- According to the process parameters, installation space and torque requirements of the customer's rolling mill, we can provide non-standard customized services for the whole process from design, manufacturing to debugging, and match the personalized transmission requirements of different rolling equipment.
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