Clamshell Grab – Efficient Bulk Material Handling Solution with Proven Grab Mechanism
Choosing the right clamshell grab is critical for bulk material handling. Many buyers face problems such as unstable grab mechanisms, material spillage, low efficiency, or poor compatibility with existing crane systems.
This article explains what a clamshell grab is, how the grab mechanism works, key applications, selection criteria, price logic, and why choosing an experienced manufacturer matters for long-term performance.
What Is a Clamshell Grab?
Basic Definition
A clamshell grab is a widely used crane attachment designed for lifting and transferring bulk materials. It consists of two symmetrical shells that open and close to collect loose materials efficiently and release them in a controlled manner.
How the Grab Mechanism Works
The grab mechanism controls the opening and closing of the shells through:
Mechanical wire-rope systems, or
Hydraulic systems driven by electric or diesel power
This simple but reliable mechanism ensures balanced gripping force and reduced material loss.
Main Applications of Clamshell Grab
Port & Terminal Bulk Cargo Handling
Clamshell grabs are commonly used for:
Coal
Ore
Sand
Fertilizer
Grain
Their symmetrical design ensures stable loading cycles on port cranes and ship unloaders.
Construction & Infrastructure Projects
Used in construction sites and batching plants for handling aggregates, sand, and gravel.
Industrial Plants & Storage Yards
Applied in power plants, cement plants, steel mills, and bulk storage yards for daily material transfer.
Types of Clamshell Grabs
Mechanical Clamshell Grab
Operated by crane wire ropes
Simple grab clamshell structure
Low maintenance and cost-effective
Suitable for traditional crane systems
Electric Hydraulic Clamshell Grab
Integrated hydraulic power pack
Faster cycle time
Higher efficiency and better control
Ideal for continuous heavy-duty operation
Diesel Engine Clamshell Grab
Independent power supply
Suitable for areas without electricity
Flexible for mobile or remote operations
Key Advantages of Clamshell Grab
Efficient Handling of Bulk Materials
The shell structure allows clean grabbing and controlled discharge, minimizing spillage.
Simple and Proven Grab Mechanism
Compared with complex multi-tine grabs, the clamshell grab mechanism offers:
Structural stability
Long service life
Easy operation
Wide Crane Compatibility
Clamshell grabs can be installed on:
Overhead cranes
Gantry cranes
Portal cranes
Ship unloaders
How to Choose the Right Clamshell Grab
1. Material Type & Density
Different materials require different shell strength and capacity.
2. Grab Capacity
Common capacities range from 0.5 m³ to 15 m³, depending on crane lifting capacity.
3. Grab Mechanism Type
Mechanical grabs are economical, while hydraulic grabs offer higher efficiency and control.
4. Working Conditions
Consider outdoor exposure, corrosion resistance, duty cycle, and maintenance requirements.
Clamshell Grab vs Other Grab Types
Clamshell Grab vs Orange Peel Grab
Clamshell grab: best for loose bulk materials
Orange peel grab: better for irregular scrap and waste
Clamshell Grab vs Mechanical Grab
Clamshell grabs provide better sealing and cleaner material handling for bulk cargo.
Price Logic of Clamshell Grab
Factors Affecting Price
Grab size and capacity
Grab mechanism type
Steel grade and wear resistance
Hydraulic or power configuration
Custom design requirements
Typical Price Range
Mechanical clamshell grab: USD 2,000 – 8,000
Hydraulic clamshell grab: USD 4,000 – 25,000+
Choosing the right configuration often reduces long-term operating costs.
Why Choose Xintai Lifting Tools Co., LTD
Professional Grab Manufacturer
Specialized in clamshell grabs and bulk material handling attachments.
Strict Quality Control
Each grab clamshell is tested for structure, load capacity, and operating cycles.
Custom Engineering Support
We provide tailored solutions based on crane type, material, and working conditions.
Global Supply & After-Sales Service
Serving ports, construction projects, and industrial plants worldwide.
Contact Us for Clamshell Grab Selection
Xintai Lifting Tools Co., LTD
Tel: +86 18263873187
Email: [email protected]
WhatsApp: +86 18263873187
Address: Yangliu Town Industrial Park, Xintai City, Tai'an City, Shandong Province
Website: https://lifting-tools.com/