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double girder bridge crane

Overhead Cranes

QD Double Girder Hook Overhead Crane

  • Type QD
  • Lifting Capacity 5~800 ton
  • Lifting Height 12-22 meter
  • Span 10.5~31.5 meter
  • Working Duty A5-A6
  • Ambient Temperature -20~40℃
  • Introduction
  • Application
  • Specification
  • Features
  • Related

Product Introduction

The double-girder hook overhead crane is an important lifting equipment widely used in different industries. It plays a key role in workshops, warehouses, steel mills, etc. This general double girder hook overhead crane provides a reliable and efficient solution for lifting, loading, and unloading heavy loads. Its superior design guarantees smooth production and logistics operations

Crane Hook Type Options

Hooks for overhead cranes can be categorized into 4 types depending on the structure, application and industry standards. When customizing hook overhead crane, please choose the right hook according to the requirement. Below are the characteristics and applications of each hook type:

Universal Hook: Standard single crane hook block design, simple structure, low manufacturing cost, DIN/ISO compliant, safety factor ≥4 times. Suitable for a wide range of routine lifting operations, wide load range (0.5~300 tons), optional forged or laminated structure, and high durability. Widely used in daily material handling in factories and warehouses, construction sites (steel reinforcement, prefabricated parts lifting), bulk cargo loading and unloading in ports and logistics centers.

Swivel Hook: Built-in precision bearings, can rotate 360° freely to prevent wire rope entanglement, adopts double-row angular contact bearings with strong axial and radial load carrying capacity. Some models are equipped with servo control to realize precise positioning (±0.5°), suitable for high-precision lifting or long material anti-rotation requirements. Widely used in shipbuilding (steel plate, pipeline lifting), wind power generation (blade installation), automated production lines (need to be accurately aligned), and so on.

New-style Hook: Adopting high-strength alloy steel and optimized structural design, the weight is reduced by 15%~20% but the strength remains unchanged; it complies with the latest FEM/ISO standards and has a higher safety coefficient. Widely used in high-end manufacturing (aerospace, automotive assembly), intelligent warehousing and logistics (automated lifting systems), heavy machinery (requires high-strength, lightweight hooks) and so on.

Hoist Hook: Designed for electric/manual hoists with standardized interfaces; compact design for small spaces (e.g., low-rise plants); optional quick release design for easy spreader replacement. Widely used in workshop light lifting (1~20 tons), maintenance work (equipment dismantling), production line material transfer (with hoist), etc.

Videos

Customized Overhead Crane

Different Types of Crane Hook Blocks

Hook Overhead Crane Parts

Hook overhead crane mainly consists of five core components: metal structure, hoisting mechanism, operating mechanism, electrical system, and safety device.

The trolley travel mechanism is on both ends of the bridge. It can drive the overhead crane along the factory or dock along the rails. This allows the overhead crane to adjust its working position over a wide range. The trolley moves along the rails, which allows flexible positioning of the lifting mechanism. It is responsible for the vertical lifting and lowering of heavy loads. This ensures smooth and safe lifting thanks to a precise transmission system and a braking device. The electrical system provides power to each mechanism of the overhead crane. It also precisely controls its operation, including motors, controllers, limit switches, etc., to ensure safe and accurate operation.

Hook Overhead Crane Parts

Specifications

ModelQD type
Lifting capacityt10 16/3.220/532/550/1075/20100/20
Max.lifting heightMain liftingm16 16 16 12 16 12 20 22 
Max. lifting heightm18 14 18 16 22 22 
Spanm10.5-31.513.5-31.513-31
Lifting speedMainm/min11.3 8.5 7.9 7.2 7.5 5.9 6.1 3.9 
15.6 10.4 10.7 9.8 9.5 7.8 6.1 4.9 
Aux. 14.6 15.5 15.5 10.4 7.2 7.2 
Trolley traveling speedm/min37.2 37.2 40.0 40.0 42.6 38.5 38.4 33.90 
Crane traveling speedA5m/min68.3/70.470.4/71.8/73.470/72/72.870/72/7374.2/75.175/75/7253.9 61.7 
A668.3/71.1/88.971.1/74.2/74.270/72/7371.3/73.6/73.67575/75/7477.8/6761.8 
Power Supply3 Phrase  A.C. 50Hz 380V or others

Application

QD overhead traveling cranes are popular in indoor and outdoor industrial and mining facilities, the chemical industry, ferrous metallurgy, railway transportation, ports and terminals, as well as in logistics warehouses, and many other areas.

In the workshops of industrial and mining enterprises, double-girder hook overhead cranes can lift raw materials, semi-finished products, and finished products. This can greatly contribute to the efficient operation of the production process.

For steel and chemical plants, it can move heavy equipment, steel, and chemical raw materials.

On rail transportation, it can assist in loading and unloading goods. At port terminals, it is a powerful tool for loading and unloading goods, lifting and transporting containers and bulk goods. In logistics warehouses, it can effectively handle the storage and transloading of various types of goods.

Features

Strong practicality and long service life

High-quality materials and rigorous technology ensure stable performance under prolonged use and high-frequency lifting operations, resulting in a long service life.

High load capacity and high working level

The high lifting capacity allows the machine to handle a wide range of lifting weights, both light and heavy.

Flexible operation

Flexible operation is expressed in the precise control of trolley operation, lifting and lowering of the hook.

Safe, reliable and economical

With perfect safety devices, it provides stability during operation, comprehensive operation safety protection. Providing high quality and performance, it also has good price competitiveness, giving users a cost-effective choice.

Certificate

certificate

Get In Touch

Please feel free to leave a message. We will reply in 24 hours.

Please specify your requirement by referring to the following aspects:

  • Which crane product do you need?
  • What is the maximum lifting capacity (in tons) required for your project?
  • Could you specify the lifting height (in meters) needed?
  • Can you provide details on the working environment, such as ground conditions, space limitations, and any obstacles?
  • What is the expected frequency of use and the duration of the project?

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