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Help CenterQJS-D800 Cylindrical Gear Reducer Used in Mining and Quarrying, Robust Construction, Overload Protection, 20000 Hours Lifetime
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Jiangsu Manqi Machinery Co., Ltd. is proud to introduce the QJS-D800 Cylindrical Gear Reducer — a powerful solution engineered for the demanding environments of mining and quarrying operations. Built with a robust construction and integrated overload protection, this gear reducer delivers reliable performance and an impressive service life of up to 20,000 hours. Whether you are crushing ores, conveying materials, or driving heavy machinery, the QJS-D800 ensures smooth torque transmission and minimal downtime, making it a trusted choice for operators worldwide.
Our gear reducer is designed to withstand extreme conditions, including high shock loads, dust, and moisture. The cylindrical gear design provides high efficiency and low noise, while the overload protection mechanism safeguards your equipment from sudden torque spikes. With a compact footprint and flexible mounting options, the QJS-D800 integrates seamlessly into existing systems, reducing installation costs and maintenance efforts.
Key Features & Technical Specifications
- Robust Housing: Made of high-strength cast iron or steel, the housing resists deformation under heavy loads and harsh environments.
- High-Quality Gears: Precision-ground cylindrical gears from alloy steel, carburized and hardened for superior wear resistance.
- Overload Protection: Built-in torque limiter or shear pin mechanism prevents damage from unexpected overloads, extending equipment life.
- Sealed Bearings: Heavy-duty bearings with double lip seals ensure long operation in dusty and wet conditions.
- Efficient Lubrication: Splash lubrication system with oil bath or forced circulation, ensuring stable temperature and low friction.
- Flexible Mounting: Available in foot-mounted, flange-mounted, or shaft-mounted configurations to suit different applications.
- Customizable Ratios: Gear ratios from 1.25:1 to 315:1, offering speed reduction options for various machinery.
- Long Service Life: Designed for 20,000 hours of continuous operation under normal conditions, with regular maintenance.
| Parameter | Value |
|---|---|
| Rated Power (kW) | 50 – 300 (customizable) |
| Input Speed (rpm) | 750 – 1500 |
| Output Torque (Nm) | Up to 50,000 Nm |
| Gear Ratio Range | 1.25:1 – 315:1 |
| Efficiency | ≥ 94% |
| Operating Temperature | -20°C to +60°C |
| Protection Class | IP54 (standard), IP65 optional |
| Lubrication Method | Splash / forced lubrication |
Benefits to Your Operation
- Reduced Maintenance: The overload protection minimizes unexpected failures, and the sealed bearings extend service intervals.
- Higher Productivity: High efficiency and reliable torque transmission ensure your machinery runs at peak performance.
- Adaptability: Multiple mounting and ratio options allow the QJS-D800 to fit a wide range of equipment — from crushers to conveyors.
- Cost Savings: With a 20,000-hour lifetime, you get a lower total cost of ownership compared to standard gearboxes.
- Proven in Harsh Conditions: Our gear reducers are tested in real mining and quarrying sites, withstanding dust, vibration, and high shock loads.
Jiangsu Manqi Machinery Co., Ltd. has been a dedicated manufacturer of power transmission components since 2017. Our factory spans 10,000–30,000 square meters and employs a skilled team of 11–50 professionals. We export to markets including Eastern Europe, Southeast Asia, Africa, and South Asia, with shipments departing from the Port of Shanghai. Every QJS-D800 gear reducer undergoes rigorous quality control and functional testing to ensure it meets your expectations.
We understand that mining and quarrying operations demand uncompromising reliability. That is why our design team continuously improves the gear reducer's durability and performance. With a focus on robust construction, overload protection, and long service life, the QJS-D800 is your trusted partner for heavy-duty applications. Contact us today to discuss your specific requirements — we offer customization services and free technical consultation.
Frequently Asked Questions
- What is the typical delivery time for the QJS-D800? Delivery time depends on the configuration and quantity, but standard models can be shipped within 30 days after order confirmation.
- Is the overload protection adjustable? Yes, the overload protection mechanism can be adjusted to a specific torque threshold according to your application requirements.
- Can this gear reducer be used in wet or corrosive environments? Yes, with optional stainless steel shaft and special coatings, it can be adapted for corrosive environments. Our standard IP54 protection also handles dust and moisture well.
- What maintenance is required for a 20,000-hour lifetime? Regular oil changes (every 2,000–3,000 hours), check of oil seals, and visual inspection of bearings are recommended. Detailed maintenance schedule is provided in the manual.
- Do you offer customized gear ratios? Yes, we provide a wide range of gear ratios, and custom ratios are available upon request. Please provide your input and output speed requirements.
- What is the warranty period? The QJS-D800 comes with a standard 12-month warranty from the date of shipment, covering manufacturing defects. Extended warranty is available.
- Can I get a sample for testing before bulk order? Yes, we accept sample orders. Sample delivery time is typically 15–20 days.
- How does the overload protection reset after a trip? The mechanism is designed for manual reset after the overload condition is cleared. In some configurations, an automatic reset option is available.
Jiangsu Manqi Machinery Co., Ltd. — Your Reliable Partner in Power Transmission. With a modern factory, experienced team, and global reach, we are committed to delivering high-quality gear reducers that meet your toughest demands. Contact us for a quote or technical support.
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