Mechanical Rehandling Grabs
Reliable mechanical grabs in two-rope and four-rope configurations for efficient bulk material handling
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Technical Specifications
| Capacity Range | 1 - 35+ m³ |
| Machine Class | 12 - 100+ tons |
| Shell Material | Hardox® 500 Tuf (wear-resistant steel) |
| Frame Material | S460 high-strength steel |
| Design Standards | NEN-EN 13001, ISO 9927, Eurocode 3 |
| Certifications | CE, EN 13155 |
| Warranty | 1 year standard warranty |
| Delivery Time | 6-10 weeks (standard), 10-14 weeks (custom) |
Why Choose the Mechanical Rehandling Grab?
Simple, reliable, and cost-effective bulk material handling for wire-operated cranes
Two Rope & Four Rope
Available in two-rope (1 hoist + 1 close) and four-rope (2 hoist + 2 close) configurations, perfectly matched to your crane type.
Reliable Operation
Simple mechanical operation without hydraulics ensures maximum reliability and minimal maintenance costs.
Abrasion-Resistant Materials
Made from high-quality, wear-resistant steel grades for long-lasting performance under heavy conditions.
Environmentally Friendly & Custom Built
Closed shells with ventilation minimize material loss and dust. Custom production in any configuration, weight, or capacity.
Product Description
The Mechanical Rehandling Grab is a reliable solution for loading and unloading various bulk materials using wire-operated cranes. This robust grab is available in two-rope and four-rope configurations and is ideal for rehandling sand, gravel, coal, grain, corn, flour, iron ore, and other bulk materials.
Two-Rope Configuration: These grabs operate with one hoist rope and one closing rope and are specially designed for cranes with two-rope operating systems. They are highly suitable for rehandling sand, gravel, and other bulk materials. The grabs can be manufactured with open or closed buckets depending on the material being handled.
Four-Rope Configuration: These grabs feature two hoist ropes and two closing ropes and are specially designed for loading and unloading sand, gravel, grain, corn, flour, and other bulk materials. The grabs can be manufactured with open or closed buckets depending on the type of work and material being handled.
Construction: The grabs are fabricated from high-quality wear-resistant steel grades for maximum durability. For fine and fluid materials, the grabs can be manufactured with closed buckets with venting to minimize material loss and environmental pollution. Optionally, the buckets are available with shaft plates to reduce capacity, which is particularly useful for materials with varying drop weights.
Our mechanical rehandling grabs can be produced in any desired configuration, weight, or capacity, fully customized to your crane type and specific application.
Applications
Our mechanical rehandling grabs are designed for various industries and applications.
Sand & Gravel
Rehandling of sand, gravel, and other construction materials in ports, depots, and transfer terminals.
Grain & Agribulk
Loading and unloading of grain, corn, flour, and other agricultural bulk materials.
Coal & Biomass
Material handling of coal, biomass, and other energy raw materials in power plants.
Iron Ore & Minerals
Rehandling of iron ore, minerals, and other raw materials in the mining and steel industry.
Phosphates & Fertilizers
Material handling of phosphates, fertilizer, and other chemical bulk materials.
Shipping & Ports
Loading and unloading ships, trucks, and containers at ports and transfer terminals.
FEA Structural Analysis
Every mechanical rehandling grab is validated through Finite Element Analysis (FEA) to ensure maximum safety and performance in your specific application.
FEA Analysis Video
Safety Factor 2.0 Minimum
Double the working load limit for exceptional safety margins according to EN 13001.
Full FEA Documentation
Receive detailed FEA report with stress distributions, deformation analysis and safety calculations.
Von Mises Stress Analysis
Complete stress analysis showing maximum stress points and material utilization throughout the structure.
Multiple Load Case Validation
Analysis includes lifting, closing under load, tilting and impact scenarios for comprehensive validation.
Configurations & Custom Options
Every project is unique. We offer a wide range of configurations and custom options to perfectly align the grab with your specific requirements.
Two-Rope Configuration
- 1 hoist line + 1 closing line
- Ideal for simple crane installations
- Open or closed shell grabs
- Minimize Material Loss
- Optional: capacity reduction spacers
Four-Rope Configuration
- 2 hoist lines + 2 closing lines
- For heavier loads and greater capacities
- Suitable for grain, corn, flour, bulk materials
- Improved stability and accuracy
- Optional: closed shells with venting
Standard Options
- High-quality wear-resistant steel grades
- Open shells for bulk materials
- Closed shells for fine materials
- Shells with ventilation for environmental friendliness
- CE Certification and Documentation
Custom Solutions
- Capacity reduction spacers
- Adapted for dump weight materials
- Calculated maximum hoisting capacity of crane
- Production in any desired weight/capacity
- Custom-made solutions
Frequently Asked Questions
What is the difference between two-rope and four-rope mechanical grabs?
A two-rope mechanical grab operates with one hoist rope and one closing rope, ideal for simple crane installations. A four-rope grab uses two hoist ropes and two closing ropes, providing greater stability and capacity for heavier loads. The choice depends on your crane configuration and material handling requirements.
What are the advantages of mechanical grabs over hydraulic ones?
Mechanical grabs have simpler operation without hydraulic systems, resulting in lower maintenance costs and higher reliability. They are ideal for wire-operated cranes in ports, depots, and terminals where consistent bulk material handling is required without the complexity of hydraulic systems.
What materials can be handled with a mechanical grab?
Mechanical grabs are ideal for handling sand, gravel, grain, corn, flour, coal, biomass, iron ore, minerals, phosphates, fertilizers, and other bulk materials. We offer both open shells for coarse materials and closed shells with ventilation for fine materials to minimize dust and material loss.
Can I install a mechanical grab on any crane?
Mechanical grabs can be installed on any wire-operated crane with the appropriate rope configuration. We calculate the maximum hoisting capacity based on your crane specifications and customize the grab weight and capacity to match your crane type and specific application requirements.
What maintenance is required?
Mechanical grabs require minimal maintenance. Regular visual inspection and lubrication of pivot points are recommended. We suggest periodic inspection to check for wear on shells and rope connections. The simple mechanical design without hydraulic systems ensures maximum reliability and low maintenance costs over many years of service.
Why Companies Choose Grippera
CE Certified
Compliant with all European safety standards
Expert Support
Technical support within 24 hours
Europe
Fast delivery throughout Europe
25+ Years Experience
Specialist in hydraulic grabs
Ready to Start Your Project?
Our grab specialists are happy to help you select the right configuration for your application. Request a non-binding quote today.
Quote Request
Easily request a non-binding quote via our website
Consultation
The quote is discussed with you to find the best solution
Quote Delivery
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Order
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Production & Transport
The grab is produced and shipped to you
Aftersales Support
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