Grab Overhead Cranes Specifications 3 ton, 5 ton, 10 ton 16 ton
Efficient & Safe Bulk Material Handling Grab Bucket EOT Crane

Grab overhead cranes are available in a variety of capacities and sizes to handle large amounts of bulk materials in an efficient and safe manner. We can provide customers with superior quality bridge cranes custom designed to meet all types of lifting requirements because we have a wealth of experience in the crane manufacturing industry. These bulk handling grab bucket cranes come in two basic configurations, single girder and double girder, which can be selected based on your application conditions and requirements.

Our company mainly produce grab overhead crane can be designed with single girder & double girder overhead crane designs. The grab overhead crane specifications can be tailored with lifting capacity of 5-20t, lifting height of 1-30m, and A6 of medium working duty. If you need a grab bridge crane with your particular specification for your application, please feel free to contact us.

LDZ single girder overhead crane parameters:

• Load capacity: 2-10t
• Span: 4.5-28.5m
• Lifting height: 6-16m
• Lifting speed: 14-16m/min
• Hoist running speed: 20m/min
• Crane running speed: 20m/min
• Work duty: A3, A4

QZ double girder overhead crane parameters:

• Load capacity: 5-20t
• Span: 10.5-31.5m
• Lifting height: 6-26m
• Lifting speed: 30.7-39.3m/min
• Trolley running speed: 31.1-44.6m/min
• Crane running speed: 76.9-93.6m/min
• Work duty: A5-A7

Main features of grab overhead crane

• Overhead lifting equipment designed specifically for bulk and granular materials;
• Simple structure, reliable, and high efficiency;
• Good manufacturing technology, long service life;
• Large load capacity, heavy duty operation;
• Depending on the the loading material, different types of crane grabs or grab buckets can be selected.

Main application of grab bridge crane

• Widely used for loading, unloading, and transferring bulk materials in power plants, garages, workshops, and docks, and many other places where bulk material handling is required.
• The rated capacity, including the weight of the grab.
• The general use grab bridge crane is prohibited to use in flammable, explosive, or corrosive media environments. lf you have any need, please feel free to contact our crane engineer.
• This electric overhead travelling crane is used in ambient temperatures of -25°C+40°C, humidity of 85%, elevation of less than 1000m, and power supply of 3-ph, 380V, 50HZ (can change as user demand).

Main structure and characters of grab overhead crane, double girder designs

Note: grab has two opening directions, vertical or horizontal to main beam . Picture above is the horizontal type.

Mainly composed by 5 parts: bridge, trolley and crane traveling mechanism, electric equipment, grab, and other accessories.

Bridge

• Double girder, steel plate welded box beam, national standard camber;
• Double girder, steel plate welded box beam, national standard camber;
• The primary weld uses automatic submerged arc welding and NDT.
• End carriages of grab overhead crane connected by high strength bolts and nuts, making transportation easier;

With uniform, fine, bright, complete, and consistent painting color; With painting thickness of 2535m each layer and total thickness of 75105m.

Trolley

• The lifting mechanism of grab bucket crane is made up of a motor, a brake, a coupling, a transmission shaft, a reducer, pulley blocks, wire rope, and other components.
• Grab eot crane is equipped with a dedicated YZR type wound motor and with insulation class F.
• Equipped with hydraulic push rod type brakes, which will close the grab when the overhead crane is not working, and opened by brake releases device when working;
• Roll casting reel with 3.5° wire rope angle, 3 laps and 2 laps fixed circle at both ends of reel;
• Overhead crane dedicated 6W(19) wire rope, line contact type, high strength, long life;
• A rotating limit switch is installed on the spindle nose of the winding drum to ensure safe lifting.

Crane traveling mechanism

• There are four traveling wheels installed on each side of the two end beams. Two of them are active wheels and the others are driven ones. The driving device of active wheels is installed on the walkway. Here adopt two sets of symmetrical independent driving devices and we call it respectively driven.
• The reducer adopts circular-arc gear one of which load capacity is higher than involute gear reducer of the same type. All of the mechanisms adopt rolling bearing with A.C. electromagnetic block brake.
• Driving devices include Reducer,Motor, Brake, Coupling,.Coupling, Wheels, etc.

• The connection of the mechanism parts all adopt gear coupling. In this way, it can work well by gear coupling compensated even there is an error caused in manufacture and installation or deflection between the parts caused by bridge deformation when loading.
• Active and driven wheel axle support on the angular bearing box for easy assembly and maintenance.

Electric equipment

• Electric control box layout is reasonable, easy to repair
• Security trolley line or angle steel trolley line
• External cable are equipped with mark line number
• Trolley moving's power is supplied by flat cable
• The conductor is I steel or C shape sliding line
• Safety sliding touch line with high conductive rate and low pressure drop; current collector with high speed.
• Lifting and crane can be independently controlled; also can work separately or together.

Overhead Crane Grabs

• Four-rope grab、double-rope grab
• Orange-petal grab、electric & hydraulic grabs
• Straw grab, wood grab, and other rich series varieties

Grab overhead crane with specification of 5 ton -19.5m-12m A7.Click to download 5 ton grab overhead crane drawing pdf.

Grab overhead crane with specification of 10 ton-29m-16m A6.  Click to download 10 ton grab overhead crane drawing pdf.

Grab overhead crane with specification of 25 ton-28.5m-21m A8, cabin control. Click to download 25 ton grab overhead crane drawing pdf. 

Grab Crane Operating Principle

• Grab or grab bucket is a type of overhead crane attachments to load or unload the bulk materials by open and close the grab bucket jaws.
• Crane grabs are classified into three types based on their operation: double-rope, single-rope, and motor grab. The most common method is the double-rope grab.
• Grab can be classified as light (such as crawl grain), medium (such as crawl gravel), or heavy based on the packing density of the materials (such as to grab iron ore)
• According to the jaw plate number, it can be divided into dual jaw plate grab or clamshell grab and multitude jaw plate grab or orange peel grab . And the double jaw or plates grab bucket is one of the most frequently used type.
• To crawl the lump ores, scrap iron, and scrap, the multitude jaw plate grab is suggested , because it has more claws and a notch tip that allows it to easily insert the stockpile and do a good crawl.
• For underwater materials or special materials handling, special designed grab bucket should be selected. And also, when the grab bridge crane is using outside, the rainproof devices will be installed.