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Help CenterLarge Ball Mill Girth Gear, 18m Diameter, Module 35, 42CrMo4, Induction Hardened, 10000 Nm, ISO 7 Precision
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Henan San Kuang Machinery Technology Co., Ltd. is proud to present our Large Ball Mill Girth Gear — an 18-meter diameter, module 35 ring gear engineered from premium 42CrMo4 alloy steel. This gear undergoes precision induction hardening to deliver exceptional wear resistance and torque capacity of 10,000 Nm, all while maintaining ISO 7 precision standards. As a manufacturer with a 10,000–30,000 m² factory and ISO 9001 certification, we combine advanced machining capabilities with rigorous quality control to provide durable, high-performance girth gears for heavy-duty ball mill applications worldwide.
Key Features & Technical Specifications
- Material Excellence: 42CrMo4 alloy steel offers superior strength, toughness, and fatigue resistance, ideal for high-load rotary equipment.
- Large Diameter: 18-meter outer diameter accommodates massive ball mills used in mineral processing, cement, and chemical industries.
- High Module 35: Coarse tooth profile ensures robust power transmission and long service life under heavy shock loads.
- Induction Hardened Surface: Hardness up to 50–55 HRC on tooth flanks, significantly extending wear life compared to through-hardened gears.
- High Torque Capacity: Rated at 10,000 Nm, meeting the demanding torque requirements of large-scale grinding operations.
- ISO 7 Precision: Gear accuracy grade ISO 7 ensures smooth meshing, reduced vibration, and lower noise levels.
- Complete Heat Treatment: Normalizing + quenching & tempering followed by induction hardening, with full inspection.
- Customizable Options: Available in segment designs for easy transport and installation; other modules and materials upon request.
| Parameter | Value |
|---|---|
| Outer Diameter | 18,000 mm (18 m) |
| Module | 35 |
| Material | 42CrMo4 (EN 10083-3) |
| Heat Treatment | Induction Hardened (surface hardness ≥ 50 HRC) |
| Rated Torque | 10,000 Nm |
| Precision Grade | ISO 7 (DIN 3962) |
| Tooth Shape | Involute (standard or modified) |
| Application | Large ball mill, rotary kiln, ore grinding |
Customer Benefits
- Extended Service Life: Induction hardening reduces tooth wear, decreasing downtime and replacement costs.
- Reliable Power Transmission: High torque capacity and precise geometry ensure stable operation even under variable loads.
- Low Maintenance: ISO 7 precision minimizes vibration and noise, leading to less frequent adjustments.
- Global Compatibility: Designed to match standard ball mill interfaces; segment options simplify shipping and onsite assembly.
- Certified Quality: Manufactured under ISO 9001 and other quality management systems, each gear undergoes ultrasonic and magnetic particle testing.
Production & Quality Assurance
Henan San Kuang Machinery operates a modern facility covering 10,000–30,000 m² with a dedicated team of 51–100 skilled employees. Our annual export value reaches US$2.5–5 million, serving markets across North America, South America, Europe, Southeast Asia, Africa, and Oceania. We utilize advanced CNC gear hobbing machines, gear grinders, and induction hardening equipment to maintain strict tolerances. Every girth gear is tested for hardness, dimensional accuracy, and magnetic particle inspection before shipment.
We are proud to hold multiple certifications including ISO 9001, ISO 14000, OHSAS 18001, and others, demonstrating our commitment to quality, environment, and occupational health. Our girth gears are shipped from major ports (Shanghai, Lianyungang, Qingdao, Tianjin) with reliable logistics partners.
Frequently Asked Questions (FAQ)
-
Q: What is the typical delivery time for an 18m girth gear?
A: Delivery time depends on current production load and customization. Typically 90–120 days after order confirmation. Please contact us for an accurate schedule. -
Q: Can this gear be used for a ball mill with a different diameter?
A: The 18m diameter is fixed for this specific model. However, we can design and manufacture girth gears for other diameters (up to 20m) and modules upon request. -
Q: Is induction hardening applied to the entire tooth or only the flank?
A: Induction hardening is typically applied to the tooth flank and root for improved bending fatigue strength. The core remains tough to absorb shocks. -
Q: What is the maximum load capacity beyond 10,000 Nm?
A: The 10,000 Nm rating is based on standard operating conditions. For higher loads, we recommend consulting our engineering team to evaluate gear design and material upgrades. -
Q: Do you provide installation supervision or onsite service?
A: Yes, we offer technical support and optional onsite installation guidance. Please specify your requirements during inquiry. -
Q: What packaging is used for sea freight?
A: Gears are securely packed with steel frame, waterproof wrapping, and cushioning material. Each segment is individually crated if segmented design is chosen. -
Q: Can you supply the gear with a matching pinion?
A: Yes, we can supply matched pinion and gear sets to ensure optimal meshing and performance. Contact us for a complete drive solution. -
Q: How do you ensure the gear meets ISO 7 precision?
A: After machining, each gear is inspected on a coordinate measuring machine (CMM) and gear tester. Reports are provided with the shipment.
With a proven track record and a dedicated team, Henan San Kuang Machinery is your reliable partner for large-scale girth gears. We invite you to contact us for a quote or technical discussion. Our engineers are ready to customize the gear to your specific ball mill parameters, ensuring maximum productivity and longevity.
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