Grab bucket is an automatic loading attachment suspended from equipment such as cranes, excavators, or dredgers. It grasps, lifts, and discharges bulk materials through the opening and closing movements of its bucket shells, and is widely used in industrial fields including ports, mines, and hydraulic dredging projects.
Core Working Principle
A typical grab bucket consists of two symmetrical bucket shells, an upper crossbeam, a lower crossbeam, and an opening-closing mechanism. It has two main power sources:
-
Cable-operated Grab Bucket: Its bucket shells are controlled to open and close by the winding and releasing of the crane's steel cables. Featuring a simple structure and low cost, it is suitable for loading and unloading small-to-medium volumes of loose materials.
-
Hydraulic Grab Bucket: Equipped with an independent hydraulic system to drive the bucket shells, it delivers strong gripping force and controllable opening-closing speed. It is ideal for heavy-duty, high-density materials (such as ores and hard rocks) and complex working conditions.
Main Types and Applicable Scenarios
Type
|
Structural Features
|
Suitable Materials
|
Typical Application Scenarios
|
Clamshell Grab Bucket
|
The two bucket shells form a clamshell shape when closed, with excellent sealing performance
|
Loose materials like silt, sand, coal, and grains
|
Port loading and unloading, river dredging, stockyard material transfer
|
Orange Peel Grab Bucket
|
Composed of 3–8 jaw petals with a large opening-closing angle
|
Irregular materials such as lump ores, construction waste, and scrap metal
|
Open-pit mining, waste recycling, metallurgical raw material handling
|
Dredging Grab Bucket
|
Thickened, wear-resistant and corrosion-resistant bucket body; some models with leak-proof design
|
Underwater silt, riverbed sand and gravel, underwater dregs
|
River widening, port deepening, reservoir dredging
|
Timber Grab Bucket
|
Jaw petals with anti-slip teeth, providing uniform clamping force
|
Long strip materials like logs and pipes
|
Wood processing factories, port timber loading and unloading
|
Material and Performance Characteristics
-
Material Requirements: The parts of the bucket shells that come into contact with materials are made of high manganese steel, wear-resistant alloy steel or surfacing wear-resistant layers to resist impact and abrasion from materials. The frame structure is usually made of high-strength carbon steel to ensure load-bearing stability.
-
Core Advantages: It enables automated operations without manual assistance, improving the efficiency of material transfer; it is highly versatile and adaptable to various types of bulk materials; the bucket size and tooth profile can be customized according to material properties.
Application Fields
-
Ports and Shipping: Loading and unloading bulk cargo such as coal, ores, and grains in ship holds.
-
Mining Industry: Open-pit ore extraction and waste handling.
-
Water Conservancy and Dredging: Silt removal and earth excavation in rivers, lakes, and ports.
-
Construction Engineering: Hoisting of sand and gravel, and transportation of construction waste.
Service
Welcome to consult China Grab Bucket suppliers. We have more than 10 years of foreign trade supply experience and have provided high-quality shipping equipment to dozens of countries around the world. We provide you with high-quality services and preferential prices customized by manufacturers. You can get a free quote online or leave a message below and we will reply to you within 24 hours.
