Mechanical Grab Bucket

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Mechanical Grab Bucket

1.Simple Structure, Efficient Grabbing:

The mechanical grab bucket adopts a purely mechanical transmission design, requiring no electrical or hydraulic systems. It features a low failure rate and stable operation, enabling fast and efficient handling of bulk materials such as coal, ore, and aggregates, significantly improving loading and unloading efficiency and saving operating time.

2.Robust and Durable Construction:

Manufactured from high-strength steel, the grab bucket offers excellent wear resistance and impact resistance, ensuring long-term stable performance even under harsh working conditions while effectively reducing maintenance costs.

3.Easy and Safe Operation:

When used with a crane, the grab bucket allows precise opening and closing control. It provides strong and responsive gripping force, is easy for operators to handle, and ensures safe and reliable operation.

4.Wide Application Range:

The mechanical grab bucket is compatible with overhead cranes, gantry cranes, port cranes, and mining lifting equipment. It meets the requirements of various bulk material handling operations and can be customized in terms of capacity, opening size, and other specifications.

Mechanical grab buckets are essential tools for modern bulk material handling. With stable performance and flexible adaptability, they provide reliable support for crane operations. Their high grabbing efficiency not only improves productivity but also reduces equipment wear and maintenance costs, making material handling safer, faster, and more economical. Whether handling coal, ore, sand, gravel, or other loose materials, mechanical grab buckets ensure stable and reliable performance across a wide range of industrial applications.

Model Volume(m3 Material Bulk Density(t/m3 Required Crane Capacity(t) Opening & Closing Time(S) Self Weight(t) Dimensions(mm)
H D a b h
U1 1 >1.8-1.9 5 14 2.065 2635 2544 1850 1150 673
U2 1.5 >1-1.8 5 12.5 2.235 2765 2700 2150 1250 745
U3 2.5 >0.5-1 5 8 2.285 2985 3200 2350 1500 927
U4 2 >1.8-2.9 10 15 3.898 3184 3070 2410 1320 826
U5 3 >1-1.8 10 15 4.4 3301 3200 2650 1550 900
U6 5 >0.5-1 10 10 4.616 3549 3790 2950 1900 1090
U7 3 >1.8-2.9 15 15.3 6.284 3726 3326 2616 1700 886
U8 4.5 >1-1.8 15 15.3 6.988 3946 2756 2956 1800 1041
U9 3 1-2 10 16.2 4.431 3315 3200 2500 1722 630
U41 4 >2.5 20 14 8.045 4215 4200 2800 1800 930
U151 6 >1-1.7 20 19 10.098 4955 4500 3200 2288 1062
U155 10 ≤1 20 13 9.812 5215 5000 3500 2478 1310

Mechanical Grab Bucket Drawing

Mechanical-Grab-Bucket product-features

Product Features and Applications

Features:

1.Pure Mechanical Transmission with High Reliability

Mechanical grab buckets feature a core transmission system composed of mechanical components such as linkages, cranks, and pulley blocks. They do not require complex power units like hydraulic pumps, cylinders, or solenoid valves, which significantly reduces potential failure points. Even under harsh operating conditions—such as high temperatures, heavy dust, or humid environments—the purely mechanical structure effectively avoids common issues like oil leakage or electrical short circuits, ensuring stable and reliable operation.

2.Fast Response and High Operating Efficiency

The opening and closing actions of a mechanical grab bucket are directly linked to the crane’s hoisting mechanism. By simply paying in or paying out the wire ropes, the grab bucket can open and close rapidly, with no response delay. This direct mechanical linkage enables quick cycle times and greatly improves overall handling efficiency.

3.High Load Capacity and Wide Material Adaptability

Mechanical grab buckets are manufactured from high-strength alloy steel, with key load-bearing components strengthened through heat treatment to ensure excellent load capacity and wear resistance. Depending on operational requirements, the grab bucket can be designed in various configurations, such as two-shell or multi-shell structures. By adjusting the bucket capacity and gripping force, it can handle materials of different densities. The load capacity typically ranges from several tons to several tens of tons, meeting diverse operational demands.

4.Compact Structure and Easy Operation

With a simple and compact overall design, mechanical grab buckets are lighter than hydraulic grab buckets of the same specification. This effectively reduces the load on the crane and helps extend the service life of the lifting equipment. In terms of operation, the control logic is straightforward—operators can complete the entire grabbing process solely through the crane’s hoisting movements, significantly lowering operational complexity.

Applications​

Thanks to their high reliability, high efficiency, and strong adaptability, mechanical grab buckets are widely used in ports and terminals, mining operations, construction sites, steel and metallurgical plants, and grain storage facilities. They have become essential equipment for bulk material handling across various industries.

Mechanical-Grab-Bucket-details

Product Details

The mechanical grab bucket is a bulk material handling device that operates through crane wire ropes and a mechanical transmission system to achieve opening and closing actions. With a mature structure and stable performance, it ensures reliable and efficient material handling operations. The grab bucket mainly consists of upper and lower cross beams, bucket shells, a linkage system, pulley blocks, and high-strength pins. All components are precisely coordinated to guarantee smooth and dependable grabbing performance.

The mechanical grab bucket is driven by the crane’s double-drum wire rope system and does not require an independent power source, resulting in a simple structure and high operational reliability. It can be accurately matched with various types of cranes, including overhead cranes, gantry cranes, and tower cranes. The bucket body and key load-bearing components are manufactured from high-strength, wear-resistant steel. Wear-prone areas such as the bucket lip and side plates can be reinforced or treated with wear-resistant materials to effectively extend service life. High-strength pins and self-lubricating bushings are used at all connection points to reduce wear and minimize maintenance requirements.

Mechanical grab buckets can be customized in type, capacity, and configuration according to material density and specific operating conditions, ensuring optimal compatibility with crane parameters. They are widely used in bulk material loading and unloading operations at ports, terminals, power plants, and mining sites.

Product Support

Hanko Heavy Industry mechanical grab buckets are developed in strict accordance with industry technical standards, with a strong focus on advanced engineering and manufacturing quality. Key structural components are made from high-grade alloy steel compliant with national standards and processed through multiple precision procedures, including CNC cutting, integral welding, shot blasting for surface treatment, and anti-corrosion coating. The result is a compact yet highly robust structure with excellent impact resistance and corrosion resistance, capable of withstanding high-intensity, continuous operating conditions.

The grab bucket pivot points are equipped with wear-resistant bearing systems, ensuring smooth and responsive opening and closing without jamming. This design enables clean and complete material discharge with minimal residue, significantly improving operational efficiency. Each product undergoes rigorous quality inspections, including load testing and non-destructive testing, to ensure all performance parameters meet specified requirements. With broad compatibility, specifications can be customized to suit different crane configurations and operating needs.

Backed by proven manufacturing processes, stable performance, and comprehensive after-sales support, Hanko Heavy Industry mechanical grab buckets are widely used across various lifting and material handling applications, offering durability, reliability, and confidence for customers seeking enhanced efficiency and long-term value.

Hanko Heavy Industry production equipment about Mechanical Grab Bucket

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About Hanko

Hanko products are manufactured using high-strength materials and go through strict quality inspections to ensure durability and operational safety.

We offer custom manufacturing services for non-standard parts based on customer drawings or specific requirements.

Our products meet international standards and are exported worldwide, earning the trust of clients across Asia, the Middle East, Europe, and beyond.

What are the crane requirements for a mechanical grab bucket?
The crane should be equipped with a double-drum hoisting system or a multi-reeving wire rope arrangement. The crane’s rated lifting capacity must be sufficient to cover both the self-weight of the grab and its fully loaded weight, with an adequate safety margin..
A mechanical grab bucket operates through wire ropes and mechanical transmission to open and close, requiring no electric power or hydraulic system. It features a simple structure and low failure rate, making it especially suitable for harsh working conditions such as high dust, high humidity, and high temperatures.
Under suitable working conditions, mechanical grab buckets provide stable grabbing and reliable operation. They are particularly well-suited for continuous, high-frequency bulk material handling, offering high overall efficiency and low maintenance costs.
Typically, the following information is required: material type and bulk density, the crane’s rated lifting capacity, operating conditions, and the required opening and closing time.

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