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Help CenterQJS-D450 Heavy Duty QJS-D Series Gear Reducer Metallurgical Mining Transmission Gearbox
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As a leading manufacturer from Jiangsu Manqi Machinery Co., Ltd. (established in 2017, with a factory area of 10,000–30,000 square meters), we specialize in producing robust transmission solutions for demanding industries. The QJS-D450 Heavy Duty Gear Reducer is a flagship product of our QJS-D series, engineered to deliver reliable power transmission in metallurgical and mining applications. Its advanced design ensures high torque capacity, long service life, and minimal maintenance, making it the ideal choice for your heavy-duty equipment.
This gearbox is built with case-hardened alloy steel gears, precision ground for smooth operation and high load-bearing capacity. The housing is made of high-strength cast iron or welded steel, ensuring rigidity and vibration damping. Every unit undergoes strict quality control, including noise and temperature tests, to guarantee consistent performance in harsh environments.
Key Features & Technical Specifications
- High Torque Density: Optimized gear geometry and heat treatment deliver up to 30% more torque compared to conventional designs.
- Modular Design: Available in multiple ratio configurations (from 5:1 to 500:1) and input/output arrangements to fit your specific drive system.
- Sealed & Durable: Equipped with high-quality oil seals and optional forced lubrication system to prevent leakage and extend bearing life.
- Versatile Mounting: Supports horizontal, vertical, or flange mounting; adaptable to motor direct connection or belt drive.
- Low Noise & Vibration: Precision-ground gears and balanced rotating components ensure smooth operation even under full load.
| Parameter | Specification |
|---|---|
| Model | QJS-D450 |
| Nominal Ratio | 25:1 (customizable) |
| Max Input Speed | 1500 rpm |
| Rated Output Torque | 4500 Nm (approx.) |
| Efficiency | ≥ 94% |
| Weight | Approx. 350 kg (depending on configuration) |
The QJS-D450 is specifically designed for the harsh conditions of metallurgical and mining operations, such as crushers, conveyors, mills, and hoists. Its robust construction withstands shock loads, high temperatures, and dust ingress. The gearbox can be equipped with an optional backstop device to prevent reverse rotation, adding an extra layer of safety for your equipment.
We understand that every application has unique requirements. That's why our engineering team offers customization services, including special input/output shafts, adapter flanges, and cooling systems. All components are sourced from reputable suppliers, and we provide a one-year warranty against manufacturing defects.
Why Choose Jiangsu Manqi Machinery?
Since our founding in 2017, we have grown to serve customers in Eastern Europe, Southeast Asia, Africa, and South Asia. Our factory in Suzhou, Jiangsu, China, spans 10,000–30,000 square meters and is equipped with advanced CNC gear cutting, heat treatment, and assembly lines. With a dedicated team of 11–50 professionals, we are capable of producing high-quality gear reducers efficiently. We ship from the Port of Shanghai, ensuring timely delivery to global destinations.
Our commitment to quality is reflected in our rigorous testing procedures: every gearbox is tested for noise, vibration, temperature rise, and leakage before shipment. We also offer technical support and after-sales service to assist with installation and troubleshooting. Whether you need a standard QJS-D450 or a custom-engineered solution, we are ready to partner with you.
Contact us today to discuss your metallurgical or mining transmission needs. Our team will provide a competitive quotation and a detailed proposal tailored to your project.
Frequently Asked Questions (FAQ)
- What is the typical lead time for the QJS-D450? Standard configurations are usually shipped within 30–45 days after order confirmation. Custom orders may require additional time depending on complexity.
- Can this gearbox be used for vertical shaft applications? Yes, the QJS-D450 supports vertical mounting with an optional oil pump system to ensure adequate lubrication.
- What lubricant should I use? We recommend ISO VG 320 or 460 synthetic or mineral oil, depending on ambient temperature and load conditions. Please refer to the user manual for specific recommendations.
- Is the gearbox reversible? It can operate in both directions, but the input/output orientation must be specified. For applications requiring a backstop, we can add an optional one-way clutch.
- What is the warranty period? We provide a standard 12-month warranty from the date of shipment against manufacturing defects, excluding wear parts.
- Can I get a CAD drawing of the gearbox? Yes, we provide 2D and 3D drawings upon request for your integration design.
- Do you offer spare parts? Yes, we maintain a stock of common spare parts such as seals, bearings, and gears. Contact our sales team for availability.
- How do I ensure proper installation? We provide a detailed installation manual and can also offer on-site technical support (subject to terms).
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