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Mechanical Grab Bucket

Mechanical grab bucket is a commonly used pick-up apparatus for crane loading and unloading bulk materials, which can be used with overhead cranes, gantry cranes, portal slewing crane and mobile cranes. It can grab grain, sand, scrap steel, ore, garbage and so on. It is widely used in ports, stations, power plants, mines, yards and other workplaces.

Four Rope Clamshell Grab Bucket

  • It is used in conjunction with cranes that have two sets of winch mechanisms (hoisting mechanism + opening and closing mechanism) on the trolley, and is mostly used in double girder overhead cranes, gantry cranes and portal cranes.
  • The lifting mechanism controls the vertical movement of the bucket, while the opening and closing mechanism controls the opening and closing of the bucket shells.
  • Suitable for handling various loose bulk materials, such as coal, sand, slag, fertilizer, and grains, for tasks including loading, unloading, and stacking.
  • Can be designed in various forms according to the material being handled and user requirements, such as toothed bucket shells, underwater operation, parallel main beams for opening and closing, or perpendicular main beams for opening and closing.

four rope clamshell grab bucket diagram

Model Volume
(m3)		 Density of materia
(t/m3)		 Capacity of crane
(t)		 Grab self weight
(t)		 Closing time
(t)		 Size (mm)
H H1 A B C
U1 1 1.8-2.9 5 2.1 11 2635 3065 1850 2544 1224
U2 1.5 1.0-1.8 5 2.25 12.5 2765 3280 2105 2789 1324
U3 2.5 0.5-1.0 5 2.38 8 2985 3444 2350 3227 1570
U4 2 1.8-2.9 10 3.94 15 3184 3757 2410 3070 1412
U5 3 1.0-1.8 10 4.4 15 3301 3960 2650 3308 1642
U6 5 0.5-1 10 4.6 10 3549 4150 2950 3790 1988
U7 3 1.8-2.9 15 6.4 15.3 3856 4532 2616 3326 1806
U8 4.5 1.0-1.8 15 6.98 17.3 4076 4851 2956 3756 1906
GC13 5 2 20 9.6 13 4820 5580 2950 5000 1914

Double Rope Clamshell Grab Bucket

  • Apply to all kinds of cranes with double lifting mechanism.
  • Used in ports, wharves, construction, road and bridge industries, suitable for grabbing all kinds of loose piles.
  • The grab adapted crane is equipped with two sets of reels, each set of reels leads to a wire rope, one of which is bundled in the grab lanyard ring, can lift the grab. The other wire rope passes through the pulley group formed by the rope guide pulley, upper bearing beam pulley and lower bearing beam pulley to open and close the grab.
  • Underwater operation is possible.

double rope clamshell grab bucket diagram

Model Volume
(m3)		 Density of materia
(t/m3)		 Capacity of crane
(t)		 Grab self weight
(t)		 Size (mm)
H H1 A B C
S0307 0.75 ≤1.7 3 1.15 2246 2620 1680 2175 1060
S0510 1 ≤2.0 5 2.1 2520 2850 2100 2500 1100
S0825 2.5 ≤2.0 8 3.3 3020 3520 2220 2800 1480
S1030 3 ≤2.0 10 4 3362 3810 2380 3140 1800
S1225 2.5 ≤2.5 12.5 5.2 3472 4160 2800 3600 1600
S1635 3.5 ≤2.6 16 6.5 3810 4206 2500 3300 1800
S2035 3.5 ≤2.3 20 12 4126 5020 3420 4640 1560
S2560 6 ≤2.8 25 8.5 4358 4800 2800 3720 2400
S3212 12 ≤1.8 32 11 4603 5463 3740 4680 2800

Single Rope Clamshell Grab Bucket

  • Suitable for cranes with only one hoisting drum.
  • Suitable for gripping all kinds of loose loads.
  • Detachable, easy to dismantle.
  • Low productivity, seldom used in mass loading and unloading operations. Cannot be tensioned and unloaded in the air.
  • Can be operated underwater.

single rope clamshell grab bucket diagram

Model Volume
(m3)		 Density of materia
(t/m3)		 Capacity of crane
(t)		 Grab self weight
(t)		 Size (mm)
H H1 A B C
U75 0.75 ≤3 5 2.1 3160 3830 1650 2070 850
U79 1.5 ≤2.8 8 3.1 4120 4720 1950 2400 1200
U64 2 ≤2.5 10 5.5 4345 5830 2400 3200 1400
U80 9 ≤1.2 15 6.2 6200 8130 3350 4200 1990
AS20-7 7 ≤1.5 20 7.8 4820 11500 2970 3770 2200
U82 15 ≤1.0 25 10.3 8000 12000 4000 5800 2500

Four Rope and Double Rope Orange Peel Grab Bucket

  • It can be used with all kinds of cranes which have two sets of winch mechanism, one set as lifting mechanism to control the vertical lifting action of the grab, and the other set as opening and closing mechanism to control the opening and closing of the grab flap.
  • It is suitable for loading and unloading of large materials such as scrap iron and steel and garbage under various harsh environments, and is widely used in ports, railroads, metallurgy, mines, construction and other industries.
  • It can be designed into bucket flap with teeth and underwater operation type.

four and double rope orange peel grab bucket diagram

Model Volume
(m3)		 Density of materia
(t/m3)		 Capacity of crane
(t)		 Grab self weight
(t)		 Size (mm)
A B H H1
LS0305 0.5 >2.0 3 1.85 1780 2100 2150 2460
LS0507 0.75 >2.5 5 2.4 2000 2480 2380 2730
LS1015 1.5 >3.3 10 4.9 2560 3200 3100 4030
LS1655 5.5 >1.8 16 7.8 3700 4600 4045 4975
LS2040 4.0 >2.8 20 8.2 3600 4300 3985 4936
LS2565 6.5 >2.0 25 13 3800 4800 4390 5418
LS4080 8.0 >3.0 40 17 3960 5200 5273 6080

Single Rope Orange Peel Grab Bucket

  • Suitable for all kinds of cranes with only one hoisting reel.
  • Suitable for gripping large materials such as garbage, scrap steel, etc.
  • Detachable, easy to dismantle.
  • Low productivity, seldom used in mass loading and unloading operations. Cannot be opened and unloaded in the air.
  • Can be operated underwater.

single rope orange peel grab bucket diagram

Model Volume
(m3)		 Density of materia
(t/m3)		 Capturing the material
(t)		 Capacity of crane
(t)		 Size (mm)
A B H
LD0305 0.5 3.2 1.6 3 3070 1780 2100
LD0507 0.75 3.2 2.4 5 3280 1970 2450
LD0510 1 2 2 5 4070 2200 2730
LD0515 1.5 1.5 2.25 5 4330 2450 2850

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