A crane reducer, also known as a crane gearbox, is a mechanical device used in crane systems to reduce the speed of the electric motor or engine, while increasing the torque output. It is typically installed between the crane motor and the rotating machinery, such as the drum or wheel, to provide the necessary power and control for lifting and moving heavy loads.
The crane reducer consists of a housing, bearings, shafts, gears, and other components. It operates on the principle of gear reduction, where multiple gears of different sizes are arranged in a sequential manner to achieve the desired speed reduction and torque increase. The gears inside the reducer mesh together, transferring the power from the motor to the load, enabling precise and controlled movements.
The main function of a crane reducer is to adjust the speed and torque output to match the requirements of the specific crane application. It allows for smooth and controlled lifting, lowering, and horizontal movement of the crane without overloading or damaging the motor or other components. Crane gearboxes are designed to handle heavy loads and provide reliable and efficient operation in various industrial sectors, including construction, manufacturing, shipping, and transportation.
Crane Gearbox Types
Helical Gearbox: Helical gearboxes are widely used in crane applications due to their high efficiency, compact design, and smooth operation. They provide reliable torque transmission and can handle heavy loads with minimal noise and vibration.
Planetary Gearbox: Planetary gearboxes are known for their high torque density and compact size. They offer excellent power transmission capabilities, making them suitable for cranes that require high torque output in a limited space.
Worm Gearbox: Worm gearboxes provide high gear ratios and excellent self-locking capabilities, making them ideal for applications that require precise positioning and holding heavy loads. They offer high efficiency and are commonly used in lifting mechanisms of cranes.
Bevel Gearbox: Bevel gearboxes are used in cranes that require changes in direction or angle transmission. They provide smooth and efficient power transfer between intersecting shafts, allowing for versatile crane movements.
Parallel Shaft Gearbox: Parallel shaft gearboxes are commonly used in crane applications where high torque and low-speed requirements are essential. They offer reliable power transmission and can handle heavy loads with ease.
These gearbox types can be customized to meet specific crane requirements, ensuring optimal performance and compatibility with the crane's lifting operations.
Features
High-quality gearbox brands like Siemens, Dongli, and SEW Reducer.
Efficient power transmission from the motor to the hoisting mechanism.
Smooth and precise operation for lifting and lowering heavy loads.
Designed for durability and reliability in demanding crane applications.
Easy installation and maintenance for seamless crane operation.
Specification
Available gearbox brands: Siemens, Dongli, SEW Reducer.
Various gearbox types and sizes to suit different crane configurations.
Customizable specifications to meet specific crane requirements.
| Parameter Category | QJ Series (Medium-Hard Tooth Surface) | QY Series (Hard Tooth Surface) | QSC Series (Three-in-One Type) |
| Applicable Mechanism | Crane travel mechanism (gantry/trolley), metallurgy/transport equipment | Crane hoisting/travel mechanism, port machinery | Gantry crane travel mechanism, light industry/construction equipment |
| Gear Surface Treatment | Quenched & tempered medium-carbon alloy steel (medium hardness) | Carburized & quenched low-carbon alloy steel + gear grinding (HRC58-62 hardness) | Hard-tooth surface grinding process |
| Transmission Stages | 2 or 3 stages | 3, 4, or 3+4 combined stages | Vertical shaft transmission |
| Transmission Ratio Range | 10~200 | Up to 400 (meets low-speed crane requirements) | Wide range (unspecified) |
| Load Capacity | Allowable torque: 2,587~25,000 N·m (e.g., QJ-T280: 2,587 N·m) | 30%+ higher than medium-hard surfaces, reduces frame size by 2-4 grades for equivalent load | Compact structure, wide power range |
| Input Speed | ≤1,000 rpm | ≤1,500 rpm | ≤1,500 rpm |
Installation Type | Vertical (L) or horizontal (W) | Three-point support (QYS) or base-mounted (QYD), supports deflection installation | Vertical shaft type, dual-side output shaft assembly |
| Temperature Tolerance | -40℃ ~ +45℃ | -40℃ ~ +45℃ | -40℃ ~ +45℃ |
Upgrade your crane's hoisting system with our reliable and high-quality crane gearboxes. Contact us today to discuss your gearbox needs and let our experienced team provide you with the perfect solution. Enhance the performance and efficiency of your crane with our premium gearbox options. Request a quote now and take advantage of our reasonable prices and top-notch gearboxes.
CASE
To give you a clearer understanding of how our crane gearboxes perform in real working environments, we’ve compiled a series of project cases from our global customers. These examples showcase how Sinoko’s gearbox solutions are applied across different industries—from heavy manufacturing to steel plants—ensuring reliable performance, enhanced efficiency, and long-term durability. Explore the case studies below to see how our crane accessories make a real impact.
30T C-Hook Deployment for Copper Producer in Ecuador by Sinoko Cranes
Sinoko C-Hooks cut Ecuador copper coil damage to 0%! 30T capacity, 150°C heat-resistance & EdgeGuard™ jaws boost throughput 50%. Get coil lifting solutions now!
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Installation of QZ-Type Grab Bucket Bridge Crane Project Case
The Sinoko QZ-Type Grab Bucket Bridge Crane was specially designed for a Brazilian client as a grab bucket crane, which significantly improved the client's work efficiency and received unanimous praise from the client.
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40.5T Rail-Mounted Gantry Crane Installation for Port Logistics Efficiency
The RMG gantry crane designed and manufactured by Sinokocrane has effectively solved the problems for the customers and reduced their operational costs.
Learn More Get a QuoteFAQs
A crane gearbox, also known as a reducer, transforms high-speed, low-torque motor output into low-speed, high-torque motion essential for lifting heavy loads safely and efficiently
Sinoko offers multiple gearbox options tailored to specific needs, including Helical, Planetary, Worm, Bevel, and Parallel Shaft gearboxes—each optimized for factors like noise, directional control, torque density, and compactness.
Yes—Sinoko supplies high-quality gearboxes from reputable brands such as Siemens, Dongli, and SEW Reducer, ensuring reliable performance and broad compatibility .
The gearbox ensures efficient transmission of motor power to the hoisting mechanism, enabling smooth, precise lifting and lowering of heavy loads while protecting motor components.
Absolutely. Gearboxes come in various sizes and types, and Sinoko provides customization options to meet the unique requirements of different crane systems.
Upgrading with Sinoko’s gearboxes brings enhanced durability, dependable operation, simplified installation and maintenance, and overall improved hoisting system performance.
