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Help CenterQJS-D500 Parallel Shaft Cylindrical Gear Reducer Overhead Crane Running Gear Box
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Jiangsu Manqi Machinery Co., Ltd., established in 2017 and located in Suzhou, Jiangsu, China, is a professional manufacturer specializing in power transmission solutions. With a factory spanning 10,000–30,000 square meters and a dedicated team of 11–50 employees, we focus on delivering reliable, high-performance gearboxes for industrial applications. Our QJS-D500 Parallel Shaft Cylindrical Gear Reducer is specifically designed for overhead crane running gear boxes, providing efficient, smooth, and durable power transmission for heavy-duty travel drives. Whether you are upgrading an existing crane or building a new system, this gear reducer offers the perfect balance of strength, precision, and longevity.
The QJS-D500 features a robust parallel shaft design with case-hardened cylindrical gears, ensuring high load capacity and minimal noise during operation. Its compact housing and foot-mounted configuration make installation straightforward, while the modular design allows for easy maintenance. Ideal for bridge cranes, gantry cranes, and other overhead lifting equipment, this gearbox is built to withstand challenging environments, from steel mills to warehouses.
Key Features & Technical Specifications
- Parallel Shaft Cylindrical Gears: Precision-ground, case-hardened gears for high torque transmission and long service life.
- High Torque Density: Compact design delivers up to 50,000 Nm output torque, depending on gear ratio.
- Wide Gear Ratio Range: Standard ratios from 10:1 to 100:1, with custom ratios available upon request.
- Smooth & Quiet Operation: Optimized gear profile and rigid housing reduce vibration and noise.
- Durable Housing: High-strength cast iron or steel housing protects internal components from dust, moisture, and impact.
- Sealed Bearings: High-quality oil seals and bearings prevent leakage and extend maintenance intervals.
- Flexible Mounting: Standard foot-mounted design; other configurations (flange, shaft-mounted) are customizable.
- Easy Maintenance: Accessible oil drain and fill ports, plus inspection covers for quick gear checks.
| Parameter | Value |
| Model | QJS-D500 |
| Gear Type | Parallel shaft cylindrical, hardened & ground |
| Input Speed | Max 1500 rpm (other speeds upon request) |
| Output Torque | Up to 50,000 Nm (depends on ratio) |
| Gear Ratio | 10:1 – 100:1 (customizable) |
| Housing Material | Cast iron / Fabricated steel (optional) |
| Lubrication | Splash lubrication (oil bath) |
| Mounting | Foot-mounted (horizontal) |
Benefits for Your Crane Operation:
- Reliable Movement: Consistent torque output ensures smooth acceleration and deceleration of the crane bridge, reducing wear on rails and wheels.
- Low Maintenance: High-quality seals and bearings minimize downtime; oil changes only required every 6–12 months under normal conditions.
- Energy Efficiency: Optimized gear geometry reduces friction losses, lowering electricity consumption.
- Customizable Options: We can adapt input/output shafts, flanges, and ratios to match your specific crane design.
At Jiangsu Manqi Machinery, we have been serving the global market since 2017, with our products exported to Eastern Europe, Southeast Asia, Africa, and South Asia. Our factory spans over 10,000 square meters, equipped with advanced CNC gear hobbing, grinding, and heat treatment facilities. We employ a professional team of 11–50 skilled workers and engineers who ensure strict quality control at every stage. Each QJS-D500 gearbox undergoes rigorous testing – including noise, vibration, and load testing – before shipment from the Port of Shanghai. Our annual export value remains below US$1 million, reflecting our focus on building long-term relationships rather than chasing volume. We pride ourselves on responsive customer service, competitive pricing, and reliable delivery. Choose the QJS-D500 for your overhead crane running gear box and experience a durable, high-performance solution backed by a dedicated manufacturer.
Frequently Asked Questions (FAQ)
Q1: What is the typical lead time for the QJS-D500 gear reducer?
A: Standard models with common ratios can be shipped within 30–45 days after order confirmation. Customized versions may require 45–60 days, depending on complexity. We always do our best to meet urgent requests.
Q2: Can this gearbox be used for other applications besides overhead cranes?
A: Yes, the QJS-D500 parallel shaft design is suitable for many industrial applications requiring moderate torque and speed, such as conveyor systems, mixers, and hoists. However, it is optimized for crane travel drives. Please consult our engineers for application-specific advice.
Q3: What type of oil should be used for lubrication?
A: We recommend using synthetic gear oil (ISO VG 220 to 460) depending on ambient temperature and load. A detailed lubrication chart is provided in the user manual. For extremely cold environments, lower viscosity oil may be used.
Q4: Is the gear reducer reversible?
A: Yes, the QJS-D500 can operate in both clockwise and counterclockwise directions. The housing is symmetric and does not require any modifications for reverse rotation.
Q5: What is the warranty period?
A: We offer a standard 12-month warranty from the date of shipment, covering defects in materials and workmanship. Extended warranty options are available upon request.
Q6: Can you provide drawings or CAD files for integration?
A: Yes, we can provide 2D/3D drawings (DWG, STEP, IGES) for your design engineers. Please contact our sales team with your specific requirements.
Q7: How do I determine the correct gear ratio for my crane?
A: The required ratio depends on the crane travel speed, wheel diameter, and motor speed. Our technical team can help calculate the optimal ratio. Typically, ratios between 20:1 and 80:1 are common for overhead cranes.
Q8: Do you offer after-sales support and spare parts?
A: Absolutely. We maintain a stock of common spare parts (seals, bearings, gears) and can ship them quickly. Our after-sales team is available via email, phone, or video call to assist with installation and troubleshooting.
Contact Jiangsu Manqi Machinery Co., Ltd. today to discuss your overhead crane gearbox requirements. We are committed to providing high-quality products, competitive pricing, and reliable support for your projects in Eastern Europe, Southeast Asia, Africa, South Asia, and beyond.
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