crane grab

Authentication mark:

This grab is mainly used in bulk ports, steel mills, and power plants.

Capacity:

2t, 4t, 5t, 8t, 10t, Other

Lifting Height:

Span:

Voltage/Hertz:

Working Class:

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Introduction

Application Scenario

Advantages

Structural Diagram And Parameter Table

INTRODUCTION

The crane grab (also known as a clamshell bucket or grab bucket) is an attachment used on cranes, hoists, or excavators for handling loose bulk materials. It features two hinged shells that open and close via a hydraulic cylinder or mechanical rope system. Grab capacities typically range from 0.1m³ to 10m³, handling materials from light grain to heavy ore. This versatile tool enables efficient grabbing, lifting, and dumping of bulk cargo without manual shoveling. Product differentiation description

Mechanical type single rope grab bucket Mechanical type single rope grab bucket is suitable for the series cranes with the lifting drum (single hook), the opening and closing of novel structure, loading and unloading material freely open and close, This design is very easy to operate,and it can be used in underwater and ground operations. this grab bucket can open in the sky.

Mechanical type double rope grab bucket Double rope grab is suitable for double lifting device structure of all types of cranes, grab the loose deposits. Reliable work, convenient operation, high productivity, wide application, use and port, wharf, highway and bridge construction industry. They become the four rope grab with two sets of double rope, the working process and the double rope grab the same. It can become the four rope grab with two sets of double rope, the working process are the same.

Four Rope Grab Bucket with jaw plate The grab catching rate is about 95%~100% , it is minimal decreasing to loose the granularity materials when working.The bearing beam frame is shortened, Main point of liner material for bearing steel. Prolonging the service life of the 4~5 times,and the blade plate adopts the wear-resisting material which enhance the impact and friction level, the pulley multi-layer seal process,dust-proof, waterproof can underwater operations, the blade plate together gap clearance small, can achieve 0.3mm~1mm can keep clean, the hole structure the work place have strong shape not easily dislocation.

Electric clamshells hydraulic grab The Electric clamshells hydraulic grab open and close with hydraulic cylinders. The drive- unit for this is an electric motor with hydraulic pump. The drive- unit of the grab needs an electrical power- supply from the crane over a cable. Over this cable the grab gets also his commands. For the cable- guide is a additional equipment on the crane- jib necessary.

Electric Motor Grab Bucket using for crane Electric motor grab is using for all kinds of crane with their own open or close device, it can be load and unload material in any height. The working efficient and productivity is higher than the single rope grab, which is easy to operation, Apply to lifting height add the cable reel machine conveying energy. Note: this grab can’t operate underwater.

Motor Dual Scoop Hydraulic Grab Motor Dual Scoop Hydraulic Grab become open and close with hydraulic cylinders. The drive- unit for this is an electro- motor with hydraulic pump. The drive- unit of the Motor Dual Scoop Hydraulic Grab needs an electrical power- supply from the crane over a cable. Over this cable the grab gets also his commands. For the cable- guide is a additional equipment on the crane- jib necessary.

Timber grab it is mainly used for grabbing and handling logs, lumber, pipes, drums, objects of various specifications, can also be a single grab and a plurality of grab, with tower crane, the use of portal hoist crane. It is applicable to the log yard, port of discharge.

Straw bundle grab It is dedicated to a material handling equipment development power plant straw, loading and unloading, stacking storage, working mainly for straw bale. Working level high, adapting to the plant straw warehouse working environment moisture, dust, frequent use, uninterrupted work demand.

APPLICATION SCENARIO

[1] Bulk cargo terminals – Unloading coal, iron ore, grain, and fertilizers from ships.

[2] Steel mills – Handling scrap metal, coke, and limestone.

[3] Power plants – Feeding coal into hoppers or reclaiming from stockpiles.

[4] Construction sites – Digging and moving sand, gravel, or crushed stone.

[5] Waste treatment facilities – Grabbing municipal solid waste for incineration or transfer.

ADVANTAGES

[1] High handling efficiency – Grabs large volumes per cycle, reducing labor and time.

[2] Versatile material compatibility – Available in heavy‑duty for ore or light‑duty for grain.

[3] Strong clamping force – Tight closure prevents material spillage.

[4] Wear‑resistant construction – Hardox or manganese steel for long service life.

[5] Easy attachment – Mounts on cranes, excavators, or hoists with standard pins.

STRUCTURAL DIAGRAM AND PARAMETER TABLE

Six core advantages

Full Scenario Coverage

Nucleon covers over 20 product categories including ladle cranes, multi-purpose cranes, intelligent cranes, overhead/portal cranes, RTG, RMG, deck cranes, portal cranes, girder launchers, yacht cranes, KBK, and jib cranes. From steel smelting to port handling, bridge construction to ship equipment, Nucleon provides one-stop lifting solutions. Whether standard models or extreme-condition customizations, Nucleon possesses mature technical expertise and proven track records, saving customers from dealing with multiple suppliers.

Military-Grade Quality Standards

We use high-strength steel from Baosteel/Ansteel for key structural components, with 100% NDT inspection and one-clamp CNC gantry machining. Every machine undergoes 120% dynamic load and 125% static load tests before delivery, with continuous operation verification under extreme conditions. Even in 24/7 continuous casting plants, -40°C arctic ports, or high-temperature humid ship cabins, our cranes maintain millimeter-level precision and zero-drift stability—quality that stands the test of time.

Extended Longevity & Low Maintenance Cost

Our main girders are FEA-optimized and double-submerged arc welded, with a design life of ≥30 years. Key bearings are lifetime lubrication-free, and hardened travel wheels extend wear cycles by 3 times. Core components feature modular quick-change interfaces with spare parts commonality exceeding 80%. Annual maintenance costs are reduced by 40%~60%, saving millions in lifecycle operating expenses — truly "invest once, benefit long-term."

Energy Efficiency Leader

Our entire series comes standard with IE5 permanent magnet synchronous motors + energy feedback VFD drives, achieving 25%~35% comprehensive energy savings. Single-motor operation under light loads and adaptive speed control reduce electrical waste by over 30%. High-strength steel lightweight design cuts deadweight by 15%~20%, lowering workshop load requirements. A single ladle crane station saves over RMB 150,000 in electricity costs annually, helping customers achieve green and low-carbon production.

Ultimate Safety Redundancy Design

Our hoisting mechanism comes standard with dual brakes + mechanical overspeed switch + triple limit switches, featuring multiple redundant interlocks to prevent load dropping and over-traveling. Large products use box girder torsion-resistant structures, remaining stable even in level 8 gusty winds. Optional intelligent safety monitoring systems detect anomalies in load, skew, wind speed, etc., with automatic alarms and shutdowns. Overall safety redundancy coefficient > 2.0, maintaining zero crane safety incidents for many consecutive years.

Deep Customization & Full Lifecycle Service

We provide complete front-end support from site survey and mechanical simulation to civil review, delivering custom drawings within 2 weeks, with non-standard lead times only 5~7 days longer than standard products. We establish lifelong digital dossiers for customers, warning of end-of-life components 3 months in advance. Our full lifecycle services cover installation training, regular inspections, and remote O&M. With customer repeat purchase rates exceeding 85% for five consecutive years, we are a trustworthy long-term partner.