Crane Grab, Overhead Crane Grab & Gantry Crane Grab

The overhead crane grab is a kind of tool used with cranes for material handling, which is mainly designed for handling of powder and fine bulk materials such as chemicals, fertilizer, grain, coal, coke, iron ore, sand, particle construction materials and mashed rock, etc.

crane grabs are widely applied in ports, steel plants, power stations ships and garbage treatment plant with various cranes, such as, tower cranes, ship cranes, ship unloaders traveling cranes, etc.

Types of overhead crane grabs & gantry crane grabs

Based on different standards, the crane grabs can be classified into different types. And the general classifications of crane grabs are as follow:

Overhead crane grabs types based on crane grab shape

Based on crane grab shapes, crane grabs can be classified into clamshell crane grabs, orange peel grab, and cactus crane grab.


Main types of crane grabs - clamshell grab, cactus grab, orange peel grab

• Clamshell crane grab is the most common one which is used in silty, clayey and sandy materials.
• The orange peel crane grab is frequently applied to remove the large irregular pieces of rock and other irregular pieces. With 8 jaws, the orange peel grab usually do not close very well.
• Cactus crane grab is used to handle the coarse and fine materials at same time. With 3 or 4 jaws that close very well in the closed position and form a proper bucket.

Classifications of overhead crane grabs based on bulk density of materials

According to bulk density of materials, crane grabs can be grouped in light, medium, heavy, and extra heavy crane grab basket.

• Light crane grab is used to handle materials with the bulk density of γ< 1.2t / m³ , such as dry grain, little bricks, lime, fly ash, aluminum oxide, sodium carbonate, dry slag , etc.
• Medium crane grab is used to handle materials with the bulk density of γ=1.2t/ m³~2.0t/ m³, such as, gypsum, gravel, pebbles, cement, large blocks, etc.
• Heavy crane grab is used to handle materials with the bulk density ofγ= 2.0t / m³ ~2.6 t / m³, such as, hard rock, small and medium-sized ore and scrap steel, etc.
• Extra heavy crane grab is used to handle materials with the bulk density ofγ>2.6t / m³,such as, heavy ore, scrap steel, etc. .

Types of overhead crane grabs based on mechanical principals

• Ropes grab. The crane grabs can be classified into single rope crane grab, double rope crane grab, and four rope crane grabs.
• Power self-supplied grab . The power self-supplied grab is usually referred to the one with electric motor, which is not suitable for underwater work.
• Non power self-supplied grab . The non-power self-supplied grab is mainly referred to electric hydraulic grab and pneumatic type grab.

Gantry crane & overhead crane grab s offering of Yuantai Crane

As a professional crane manufacturer and supplier, Yuantai Hoist and Crane can provide you various types of crane grabs with various sizes and capacities to be used in overhead crane and gantry crane to meet your requirements. The followings crane grabs are shown for your reference.

Rope crane grab for overhead cranes & gantry cranes

Crane grab is a kind of hoist lifting spreader which can crane grab varieties of bulk materials, divided into four rope type, double rope type, single rope type, electric type, discs type, shear type, hydraulic type and log type, etc.

• Single rope crane grab:Single rope crane grab apply to the crane only have one lifting reel, freely opened and closed during loading and unloading of bulk materials, the whole crane is easy to use and disassembly, suitable for underwater operations crane grab and stack. Single rope crane grab unable to open in the air, hand and remote control type can be realized to open in the air.
• Double rope crane grab: Suitable for double hoisting mechanism crane, apply to crane grab all kinds of loose debris. Two hoisting mechanisms, one is responsible for crane grab lift, another is for crane grab opening and closing.
• Four rope crane grab ;With good strength, light weight, reasonable structure, material crane grab finer and smaller. Blade plate using special wear-resistant plate, enhancing the degree of impact and friction, multi-layer sealing process using on pulley, dust and water can be operated underwater, blade plate seam gap is small which can reach 0.3mm, can maintain a cleaner workplace, the overall structure is not easy to deform, four rope crane grab can also be designed to double rope crane grab.

Clamshell grab for overhead cranes & gantry cranes

• Clamshell grab consist of two integral buckets, orange peel grab include three or more movable jaw. Regarding to clamshell grab, it is mainly matched withbridge craneto grab different kinds of loose deposits for loading, unloading, shifting, charging and other operation.
  
  Owing to clamshell grab have different volume; the rate of material is diverse. We usually divide the clamshell grab into four categories: light duty, middle duty, heave duty and extra-heavy duty.

Clamshell grab bucket

Orange peel crane grab for overhead cranes and gantry cranes

Four rope orange peel grab: Mainly for handling of irregular shape materials such as scrap, refuse, gravel etc., suitable for steel mills refuse plants, port and railway.<.p>

Orange peel grab for overhead cranes and gantry cranes

Motor driving crane grab

The electric motor driving crane grab got lots of types, our company equips the crane grab with standard electric block as switching mechanism, The motor crane grab can be considered that the closed drum is moved to the grab, Due to the closed its huge grabbing force, It is used to grab hard materials as ores, etc.

Electric stainless steel crane grab

Designed specifically for the brewing industry, crane grab help brewing koji, sauce, and sauce making, etc., reduce the labor intensity of the workers, is conducive to the clean and sanitation of production floor.

Scissor crane grab

Scissor crane grab relies on wire rope retractable to close and open the crane grab jaw. its closing moments increased gradually during closing process, does not leak and clean material when crawling materials, mostly used for ship unloader.

Scissor crane grab for overhead cranes and gantry cranes

Electric hydraulic crane grab

Design and manufacturing according to FEM / DIN standard, import the main hydraulic components. Big Grasping force, high degree of automation, it is ideal handling tools for large pieces of ore, pig iron, scrap, waste, iron, straw, slag and other materials. It is mainly used in iron and steel, mining, forest farm, coal mining, harbor dock, scrap steel acquisition, garbage disposal, bioelectrogenesis and other industries.
Depending on different industries, using occasion and the crane grab materials, electro-hydraulic crane grab divided into discs type and two discs type. Orange Discs type is divided into circular and rectangular, its claw including closed, semi-open and open type.

Hydraulic grab for overhead cranes and gantry cranes

Log crane grab

It is suitable for lumber yard, large wood products factory, paper mills, ports and other industries, for loading and unloading, stacking. The structure is divided into four types: single rope, double rope, four rope and electric type. It can be also designed and manufactured according to your needs.


Log grabs for overhead cranes and gantry cranes