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Help CenterQY34D400 Hardened Gear Reducer Wear Resistant Gear Box for Heavy Lifting Industrial Equipment
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Jiangsu Manqi Machinery Co., Ltd. proudly presents the QY34D400 Hardened Gear Reducer – a robust, wear-resistant gear box engineered specifically for heavy lifting and industrial equipment. Since our establishment in 2017, we have focused on manufacturing durable transmission solutions at our 10,000–30,000 m² facility in Suzhou, China. This gear reducer combines advanced hardening technology with precision machining to deliver exceptional reliability under extreme loads, making it the ideal choice for cranes, hoists, and other lifting machinery.
Key Features & Advantages:
- Hardened Gear Teeth: All gears undergo carburizing and quenching processes to achieve surface hardness of HRC 58–62, ensuring outstanding wear resistance and a long service life even in continuous heavy-duty operation.
- High Load Capacity: The QY34D400 is designed to handle torque up to 50,000 Nm, with a compact multi-stage gear train that efficiently distributes stress.
- Low Noise & Vibration: Helical gear profiles are precision ground to reduce meshing noise and vibration, enhancing operator safety and comfort.
- Reliable Sealing: High-quality oil seals and labyrinth rings prevent leakage and contamination, suitable for dusty or humid environments common in construction sites.
- Flexible Configurations: Available with foot mounting, flange mounting, or combined options; input/output shaft orientations can be customized to fit your equipment layout.
Technical Specifications (Typical Values):
| Parameter | Value / Range |
| Model | QY34D400 |
| Reduction Ratio | 5:1 – 500:1 (Customizable) |
| Max. Output Torque | 50,000 Nm |
| Input Speed Range | 750 – 3000 rpm |
| Efficiency | ≥95% (per stage) |
| Lubrication | Oil splash / forced (optional) |
| Housing Material | Ductile iron QT500-7 |
| Weight (approx.) | 350 kg (base config.) |
The QY34D400 is built to withstand the harshest conditions in heavy lifting applications. Its hardened & ground gears reduce wear by up to 30% compared to standard induction-hardened gears, lowering your maintenance costs. The robust housing is sealed to IP54, protecting internal components from debris and moisture. With a service life of over 20,000 hours under rated load, this gear box delivers reliable performance for years.
Trusted by Global Customers
As a specialized manufacturer with a 10,000–30,000 m² factory and a team of 11–50 skilled workers, Jiangsu Manqi Machinery has been serving markets in Eastern Europe, Southeast Asia, Africa, and South Asia since 2017. Our annual export value is under US$1 million, reflecting our steady focus on quality over volume. We ship from the Port of Shanghai with careful packaging to ensure safe delivery. Every QY34D400 gear reducer undergoes a 4-hour test run before leaving our workshop. We invite you to contact us for a custom quote or technical discussion – our engineers are ready to help you select the optimal configuration for your lifting equipment.
Frequently Asked Questions (FAQ)
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Q1: What is the maximum load this gear reducer can handle?
A: The QY34D400 is designed for heavy lifting equipment and can transmit torque up to 50,000 Nm. The actual lifting capacity depends on your winch drum diameter and rope configuration; please provide your application details for a precise recommendation. -
Q2: Can the reduction ratio be customized?
A: Yes, we offer a wide range of reduction ratios from 5:1 to 500:1. Ratios outside this range are also possible upon request. Please specify your required input speed and output torque when ordering. -
Q3: What maintenance does this gear box require?
A: Regular oil level checks and oil changes every 2000–3000 operating hours are recommended. The housing has a drain plug for easy maintenance. Bearing grease should be replaced every 5000 hours. -
Q4: Is the gear reducer suitable for continuous operation?
A: Absolutely. The hardened gears and forced lubrication option (available on request) make it ideal for continuous heavy-duty cycles. The housing design allows efficient heat dissipation. -
Q5: What is the standard warranty period?
A: We offer a standard 12-month warranty from the date of shipment, covering manufacturing defects. Extended warranty options are available for an additional fee. -
Q6: How is the gear box packaged for export?
A: Each unit is securely packed in a wooden crate with internal bracing, sealed in plastic, and contains desiccant. The packaging meets international shipping standards and is suitable for port of Shanghai export. -
Q7: Can you provide CAD drawings or 3D models?
A: Yes, we can share 2D/3D drawings after order confirmation or upon request during the quotation phase. Please contact our sales team with your project details. -
Q8: Do you have stock units available?
A: Lead time typically ranges from 15 to 30 working days, depending on the customization level. For standard configurations, we may have limited stock – please inquire about current availability.
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