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Help CenterBall Mill Girth Gear, 12m Diameter, 20MnCr5 Material, Carburized and Hardened, 6500 Nm Torque, Dust-Proof Design
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Welcome to Henan San Kuang Machinery Technology Co., Ltd. We are proud to introduce our Ball Mill Girth Gear with a diameter of 12 meters, crafted from premium 20MnCr5 material and subjected to carburizing and hardening for superior surface durability. Designed to deliver a robust 6500 Nm torque and featuring a dust-proof design, this gear is engineered for the most demanding ball mill applications in mining, cement, and mineral processing industries. Our advanced manufacturing capabilities and strict quality control ensure long service life and reliable performance under harsh conditions.
This girth gear is the result of years of expertise in large gear manufacturing. With a factory size of 10,000–30,000 square meters and a dedicated team of 51–100 employees, we combine precision engineering with cost-effective solutions. The gear's dust-proof design minimizes maintenance downtime, while the carburized surface provides exceptional wear resistance. Below we detail the key specifications and benefits.
Key Specifications
| Parameter | Value |
| Outer Diameter | 12 m |
| Material | 20MnCr5 (Case Hardening Steel) |
| Heat Treatment | Carburizing & Hardening (Surface Hardness 58–62 HRC) |
| Rated Torque | 6500 Nm |
| Design Feature | Dust-Proof (Sealed against particulate ingress) |
| Application | Ball Mill Drives |
| Module | Customizable per customer requirement |
| Certification | ISO9001, QS9000, and other quality systems |
Product Features & Benefits
- Superior Material Strength: 20MnCr5 alloy steel provides excellent core toughness and fatigue resistance, ideal for heavy cyclic loads.
- Enhanced Surface Durability: Carburizing and hardening create a wear-resistant case (up to 62 HRC) while maintaining a ductile core for shock absorption.
- High Torque Capacity: Rated at 6500 Nm, this gear can handle the demanding torque requirements of large ball mills.
- Dust-Proof Sealing: Engineered with labyrinth seals and protective coatings to prevent dust and debris from entering the gear mesh, extending service life in harsh environments.
- Precision Machining: CNC gear cutting and grinding ensure accurate tooth profiles, reducing noise, vibration, and power loss.
- Customizable Options: Module, tooth count, bore size, and keyway can be tailored to match your existing mill drive system.
- Global Logistics Support: Shipped from ports of Shanghai, Lianyungang, Qingdao, or Tianjin with reliable packing for overseas transport.
Our Henan San Kuang Machinery team has extensive experience serving global markets including North America, South America, Europe, Southeast Asia, Africa, and Oceania. With an annual export value of US$2.5–5 million, we have built a reputation for delivering high-quality, durable gears. Our factory is certified under ISO9001, ISO14000, and other international standards, ensuring every product meets rigorous quality requirements. We also offer OEM/ODM services and can adapt the dust-proof design to your specific mill conditions.
By choosing our 12m Ball Mill Girth Gear, you invest in a component that minimizes downtime, reduces maintenance costs, and maximizes mill throughput. Contact us today for a quotation or technical discussion.
Frequently Asked Questions
A: Lead time depends on the specific design and order quantity. For standard configurations, it is approximately 60–90 days. Custom designs may require additional time.
A: Yes, we can design and manufacture the mating pinion to ensure optimal tooth contact and load distribution. Please provide your drive system details.
A: The gear incorporates labyrinth seals, rubber gaskets, and a protective housing that prevents dust and fine particles from entering the tooth mesh area. This reduces abrasive wear significantly.
A: The rated torque is 6500 Nm, but we can design higher torque ratings using different materials or heat treatment processes. Contact us with your requirements.
A: We provide detailed installation manuals and technical drawings. For large projects, our engineers can offer remote guidance or on-site supervision as an optional service.
A: Yes, 20MnCr5 is a standard case-hardening steel, and we maintain stock for common sizes. For custom dimensions, we source from reputable steel mills.
A: We follow a strict quality control process from raw material inspection to final dimensional and hardness testing. Our factory holds ISO9001 and other certifications, and we can provide inspection reports upon request.
A: We arrange sea freight from major Chinese ports (Shanghai, Qingdao, etc.) using specialized heavy-lift and breakbulk shipping. The gear is securely packed with corrosion protection.
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