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Help CenterQJY4D Crane Gear Reducer Large Load Wear Resistant Gear Box
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Jiangsu Manqi Machinery Co., Ltd., established in 2017, is a professional manufacturer specializing in high-quality transmission solutions. Our factory, spanning 10,000–30,000 square meters, is equipped with advanced production lines and a dedicated team of 11–50 skilled employees. The QJY4D Crane Gear Reducer is a testament to our commitment to durability and performance, designed to handle extreme loads in demanding industrial environments. With a focus on wear resistance and long service life, this gearbox ensures reliable operation for your crane systems, reducing downtime and maintenance costs.
This gear reducer features a robust helical gear design, precision-machined from high-strength alloy steel, offering exceptional torque transmission and shock load capacity. Its compact yet heavy-duty construction makes it ideal for overhead cranes, gantry cranes, and other material handling equipment. Whether you need to lift heavy loads in steel mills, ports, or warehouses, the QJY4D delivers consistent performance under continuous operation.
Key Features & Technical Specifications
High Load Capacity: Designed to handle large loads with minimal deflection, ensuring stable crane operation.
Wear-Resistant Gears: Surface-hardened alloy steel gears with ground tooth profiles for reduced friction and extended lifespan.
Sealed Housing: IP54 protection against dust and water splashes, suitable for outdoor and harsh environments.
Efficient Lubrication: Splash lubrication system ensures all moving parts are adequately oiled, reducing heat and wear.
Low Noise Operation: Optimized gear meshing and precision bearings keep noise levels below 75 dB.
Easy Maintenance: Modular design allows quick access to internal components for inspection and servicing.
Customizable Options: Available with different input/output shaft configurations, mounting flanges, and ratios to fit your specific crane system.
| Parameter | Specification |
|---|---|
| Gear Type | Helical Gear |
| Input Speed | 750–1500 RPM |
| Output Torque | Up to 50,000 Nm |
| Reduction Ratio | 10:1 to 100:1 (customizable) |
| Housing Material | Ductile Iron (QT500-7) |
| Lubrication | Splash lubrication with synthetic oil |
| Weight | Approx. 350 kg (varies by configuration) |
Benefits for Your Business
Reduced Downtime: The wear-resistant design minimizes gear failure, keeping your cranes operational for longer periods.
Lower Operating Costs: High efficiency (up to 98%) reduces energy consumption, saving on electricity bills.
Enhanced Safety: Robust construction and sealed housing prevent leaks and contamination, ensuring safe operation in sensitive environments.
Global Compatibility: Standard mounting dimensions allow easy replacement of existing gearboxes from other brands.
Flexible Integration: Our engineering team can modify the gearbox to match your crane's specific requirements, including custom shaft extensions or brake adapters.
Why Choose Jiangsu Manqi Machinery?
With over 7 years of manufacturing experience, we have supplied gear reducers to clients in Eastern Europe, Southeast Asia, Africa, and South Asia. Our factory's annual export value exceeds US$1 million, reflecting our growing global presence. Each QJY4D gearbox undergoes rigorous quality checks, including load testing and noise measurement, to ensure it meets your expectations. We ship from the Port of Shanghai, offering reliable logistics to major international destinations.
Ready to upgrade your crane system? Contact us today for a quote or technical consultation. Our team is available to discuss your application and provide a tailored solution that maximizes your productivity. With competitive pricing and responsive after-sales support, Jiangsu Manqi Machinery is your trusted partner for heavy-duty transmission components.
Frequently Asked Questions
Q: What is the typical lifespan of the QJY4D gear reducer?
A: With proper lubrication and maintenance, the QJY4D can operate for over 10 years in standard crane applications. The hardened gears and sealed housing significantly reduce wear.Q: Can this gearbox be used for outdoor cranes in rainy environments?
A: Yes, the housing is IP54 rated, providing protection against dust and water splashes. For extreme weather, we recommend adding a weather cover.Q: Do you offer custom reduction ratios?
A: Absolutely. We can adjust the gear set to achieve ratios from 10:1 to 100:1. Please provide your required output speed and torque for a customized solution.Q: What type of oil should I use for lubrication?
A: We recommend synthetic gear oil with a viscosity grade of ISO VG 220 or 320, depending on ambient temperature. Detailed lubrication guidelines are included in the user manual.Q: Is the QJY4D compatible with existing crane motors?
A: Yes, the input flange and shaft dimensions are designed to match standard IEC and NEMA motor frames. Adapters are available for non-standard connections.Q: What is the warranty period?
A: We offer a 12-month warranty from the date of shipment, covering manufacturing defects. Extended warranty options are available upon request.Q: How long does shipping take to Southeast Asia?
A: Typical sea freight from Shanghai to major ports in Southeast Asia takes 7–14 days. We can also arrange air freight for urgent orders.Q: Can I get a sample before placing a bulk order?
A: Yes, sample orders are welcome. Please contact our sales team to discuss sample availability and lead time.
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