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Help CenterHeavy Duty Girth Gear 10m Diameter, Module 20, Quenched and Tempered, for Ball Mill
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Henan San Kuang Machinery Technology Co., Ltd. has been a specialized manufacturer of heavy-duty transmission components since 2022, located in Luoyang, Henan – China’s renowned industrial hub. Our 10,000–30,000 m² factory and experienced team of 51–100 employees enable us to produce large-scale girth gears with diameters up to 10 meters, module 20, quenched and tempered for superior strength. This girth gear is specifically engineered for ball mills in mineral processing and cement grinding applications, delivering reliable power transmission under extreme loads.
The heavy-duty girth gear features high alloy steel (42CrMo or equivalent) through quenched and tempered heat treatment, achieving excellent hardness and toughness to withstand shock loads and abrasive environments. Each gear is precisely hobbed to AGMA or DIN standards, with strict quality control to ensure smooth meshing and long service life. Customization options (tooth profile, surface hardness, finish) are available upon request to match your existing pinion and mill specifications.
Key Technical Specifications
| Diameter | 10,000 mm (10 m) |
| Module | 20 |
| Material | Alloy Steel (42CrMo, 34CrNiMo6, or similar) |
| Heat Treatment | Quenched + Tempered (250–320 HB) |
| Tooth Hardness | Surface: 50–55 HRC (optional induction hardening) |
| Accuracy Grade | AGMA Q8–Q10 / DIN 8–9 |
| Max. Weight | Up to 50 tons per sector |
Product Features & Benefits
- High Load Capacity: Module 20 design and large diameter ensure even load distribution, reducing stress concentration and extending gear life.
- Enhanced Durability: Quenched and tempered treatment provides a balanced combination of strength and impact resistance, ideal for ball mill cyclic loading.
- Precision Machining: CNC gear hobbing and profile grinding achieve accurate tooth geometry, minimizing noise and vibration during operation.
- Customizable Fit: We can adjust bore diameter, keyway dimensions, and tooth alignment to match your existing mill shell and pinion.
- Segmented Construction: For ease of transportation and installation, the gear can be supplied in 2–4 sections with bolted joints, fully interchangeable.
- Rigorous QC: Each gear undergoes ultrasonic and magnetic particle inspection for internal and surface defects, ensuring zero crack risk.
- Global Compatibility: Designed to meet both metric and imperial standards, suitable for ball mills from leading OEMs and retrofit projects.
Trust & Reliability
Henan San Kuang Machinery has established its reputation through consistent quality and on-time delivery to markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. With an annual export value of US$2.5 million – US$5 million, we serve clients in mining, cement, and heavy industry. Our factory occupies 10,000–30,000 m² with advanced heat treatment furnaces, large gear hobbing machines (max 12m capacity), and experienced engineers. We offer flexible shipping via any major Chinese port (Shanghai, Lianyungang, Qingdao, Tianjin) and provide professional packing for sea freight. Please contact us for a tailored quote and technical drawing review.
Frequently Asked Questions
- Q: What materials are used for this girth gear? A: We primarily use 42CrMo alloy steel (similar to AISI 4140) with quenched and tempered treatment. For higher wear resistance, we can apply induction hardening on tooth flanks upon request.
- Q: Can you supply the girth gear in segments for easier installation? A: Yes, we can split the gear into 2, 3, or 4 segments. The mating surfaces are precision-machined and bolted together, ensuring perfect alignment after assembly.
- Q: What is the delivery time for a 10m girth gear? A: Typical production time is 3–5 months, depending on complexity and current workload. We can discuss expedited options if needed.
- Q: Do you offer tooth profile modifications like tip relief or crowning? A: Yes, we can apply profile modifications to optimize load distribution and reduce edge contact stresses, especially for high-torque ball mill applications.
- Q: What quality certifications do you have? A: Our quality management system follows internal standards. Specific certifications (e.g., ISO 9001) are available upon request; please confirm with our sales team.
- Q: How do you pack and ship such large gears? A: Each segment is securely blocked with steel frames, protected by anti-rust coating, plastic film, and plywood crates. We load them on flat racks or open-top containers for sea shipment.
- Q: Can you provide the gear with a matching pinion? A: Absolutely. We can manufacture the mating pinion with compatible module and pressure angle, ensuring optimal backlash and contact pattern.
Partner with Henan San Kuang Machinery for your heavy-duty girth gear needs. We combine engineering expertise, robust manufacturing, and global logistics to deliver components that keep your ball mills running efficiently for decades. Contact us today to discuss your project specifications.
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