What is the difference between the mechanical grabs and the hydraulic grabs?In terms of material handling, choosing the right grab can significantly affect efficiency and productivity.The two common types of grapple used in cranes are mechanical grapple and hydraulic grapple.Let’s explore their differences and understand when to choose each type.

First of all, let’s take a look at what is a hydraulic grab and a mechanical grab：

분류

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Working principle

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애플리케이션

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유지

The hydraulic grabs of the crane is controlled by a hydraulic system, which has the advantages of high precision and flexible operation. It is suitable for loading and unloading bulk cargo and occasions that require fine operation, but its structure is complex and the maintenance cost is high. The mechanical grabs relies on wire rope control, which is suitable for handling large pieces of materials and heavy-duty operations in harsh environments. The structure is relatively simple and the maintenance cost is low. When choosing, the type of grab to use should be determined according to the operation requirements, accuracy requirements, and operating environment.

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올바른 그랩을 선택하는 방법

목적을 명확히 하세요:before delving into the options, please clarify your specific requirements.Ask yourself：

• 어떤 재료를 다루고 싶으신가요?(통나무, 고철, 돌 등)

• 그랩은 어떤 작업을 수행하나요?(적재, 분류, 해체 등)

• 어떤 종류의 장비에 연결되나요?(갠트리 크레인, 오버헤드 크레인)

• 당신이 잡는 물질의 비중은 얼마입니까?잡는 물질의 입방체의 개수는 얼마입니까?

• 그랩은 잡아당기는 재료의 특성에 따라 보통 가벼움, 중간, 무거움, 매우 무거움의 네 가지 기본 유형으로 나뉩니다.

잡을 재료의 종류	재료를 잡아라	용량 중량(t/m³)
빛	코크스, 슬래그, 곡물, 감자, 중품질 무연탄석회, 시멘트, 토양, 자갈, 점토, 깨진 벽돌 등.	0.5~1.2
중간	이탄, 큰 조각의 무연탄, 압축탄, 점토, 석회암, 자갈, 소금, 자갈, 벽돌, 보크사이트, 산화철 조각, 시멘트, 모래와 물 속의 벽돌 등.	1.2~2.0
무거운	석회암, 무거운 점토, 소규모 및 중규모 광석, 단단한 암석, 막대 모양의 산화철, 철광석, 납 농축물 분말 등.	2.0~2.6
초과 중량	대형 광석, 대형 망간광석, 침전되어 응집된 납광석 가루 등	2.6~3.3

• 그랩이 장착된 크레인의 톤수는 얼마입니까?

액세서리 호환성: 그랩이 기존 장비와 호환되는지 확인하세요.

예산 고려 사항: 그랩의 가격대는 다양합니다. 그랩의 기능과 내구성에 따라 예산을 균형 있게 조절하세요.

의견 및 제안: 온라인에서 조사하고, 사용자 리뷰를 읽고, 업계 동료에게 제안을 구하세요.

구매하기 전에 크레인 제조업체로 가서 현장 검사 및 테스트를 받으세요. 가능한 한 실제 상황에서 그랩을 테스트해 보세요. 성능, 사용 편의성, 전반적인 기능을 평가하세요.

올바른 그랩을 선택하려면 기능성, 안전성, 비용 간의 균형이 필요합니다. 이러한 요소를 고려하면 생산성을 높이고 원활한 작동을 보장하는 완벽한 그랩을 찾을 수 있습니다.

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Choose the appropriate hydraulic grabs and mechanical grabs according to the needs of different projects

We use 2 previous Dafangcrane projects to help you distinguish the selection.

Case1-Hydraulic grabs are used on overhead cranes

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• Grab type: Electro Hydraulic Orange Peel Grabs , grab volume 4m³*A6 

• 프로젝트 유형: 폐기물 발전 프로젝트에 사용되며, 주로 생활 폐기물의 혼합, 투기, 취급, 혼합 등을 처리하여 폐기물 구성을 균일하게 유지하는 데 사용됩니다. 하루 600톤의 쓰레기를 처리하며, 장비 가동 시간은 8000시간 이상입니다.

• 재료 특성: 

• 생활쓰레기의 수분함량은 45%~65%입니다

• 그랩 내 쓰레기 밀도는 0.6~0.9t/m3 입니다.

• 쓰레기 용량(쓰레기통) 0.3~0.6t/m3

• 정적 축적 각도 65도

• Price reference： The hydraulic grabs are more intelligent and more complex than the mechanical grab, so the price is 4.1 times that of the mechanical claw grab.

• Why choose hydraulic grabs：

재료의 다양성: The composition of domestic waste is complex, the moisture content is high, and the material diversity is rich, which requires a flexible grab for processing.The hydraulic grabs are multifunctional and can effectively handle materials of different types and states.

정확성과 효율성을 파악: The hydraulic grabs can accurately control the grasping force and angle, and adapt to the fine operations required in the garbage disposal process, such as mixing, dumping, handling and stirring, to ensure uniform garbage composition.

강력한 처리 능력: 하루에 600톤의 쓰레기를 처리하며, 장비는 최대 8,000시간 동안 작동합니다. 유압 그랩의 내구성과 효율적인 성능은 고강도 작업의 요구 사항을 충족합니다.

안전성과 안정성: The hydraulic grabs operates smoothly, which can reduce the risk of material spilling and operation, improve work safety, and is suitable for handling domestic waste with high moisture content and large density changes.

복잡한 운영 환경에 적응: The hydraulic grabs can maintain efficient operation in a changeable working environment, especially suitable for garbage disposal, which requires frequent operation and flexible response to various materials.

장기 및 고빈도 작업: The durability and stability of the hydraulic grab enable it to cope with long-term and high-frequency operations, reduce downtime, and improve overall work efficiency.

In summary, the choice of hydraulic grab is based on its comprehensive considerations of flexibility, high efficiency, durability and safety, which can effectively meet the complex and high-intensity operation needs of waste power generation projects.

Case2-Mechanical grabs are used on overhead cranes

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• Grab type: 기계식 4개 로프 조개 껍질 그랩 버킷 ,grab volume 4m³

• 재료 비중：2t/m³

• 프로젝트 유형: 금속 분말 자성 소재 회사에서 사용하는 그랩 와이어 로프는 스테인리스 스틸 내열형을 채택합니다.

• Price reference：The mechanical grab has a simple structure and costs about 24.39% of the hydraulic grab, making it the best choice if you are on a limited budget
• Why choose mechanical grab：

Good sealing: materials such as metal powder are easy to scatter during handling, and the mechanical grabs has a simple structure and good sealing, which can effectively prevent materials from spilling and improve the cleanliness and safety of operations.

Cost-effectiveness: The purchase and maintenance costs of mechanical grabs are low, and they are suitable for operations with limited budgets and long-term and high-frequency use.

내구성: The grab wire rope adopts stainless steel temperature-resistant type, which is suitable for material handling such as metal powders that have high requirements for temperature and corrosion resistance.

Applicable environment: For metal powder in a dry state, the gripping force and stability of the mechanical grabs are sufficient to meet the needs, and the operation is simple and easy to maintain.

Work efficiency: The mechanical grab can quickly and efficiently complete the grabbing and handling of materials, improve the overall work efficiency, and is suitable for the rapid operation needs of industrial production lines.

In summary, the choice of mechanical grab is based on its comprehensive considerations of closure, cost-effectiveness, durability, applicable environment and operating efficiency, which can effectively meet the actual needs of metal powder magnetic material companies.

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Comprehensive comparison

It is recommended to choose mechanical grabs in the following cases：

• Harsh operating environment: In harsh environments with high dust and humidity, mechanical grabs are more reliable than hydraulic grabs and are less affected by environmental impact.

• Simplicity and cost-effectiveness are priorities: the mechanical grabs has a simple structure and low maintenance costs, which is suitable for projects with limited budgets.

• Easy maintenance: The mechanical grabs have a simple structure and a small maintenance workload, which can reduce downtime and improve operation continuity.

• Available equipment: If the existing lifting equipment does not have a hydraulic system, the mechanical grab can be used directly without additional modification or investment.

• Operation training: the operation of the mechanical grab is relatively simple, the training cost is low, and it is suitable for rapid deployment and use.

It is recommended to choose hydraulic grabs in the following cases：

• When greater gripping force is required: the hydraulic grabs are flexible in operation, the gripping force and angle can be accurately controlled, and the gripping force is stronger than that of the mechanical grabs.

• You operate hydraulic machinery: if you already have hydraulic equipment, the hydraulic grabs can be directly integrated to improve operating efficiency.

•  Safe and efficient material handling is essential: the hydraulic grabs operate smoothly, reduce material damage and operational risks, and improve work safety and efficiency.

• There are automation requirements: the hydraulic grab can be integrated with the automation control system to achieve more intelligent operations and improve the overall production efficiency.

In short, mechanical grabs and hydraulic grabs have their advantages in material handling. Evaluate your specific requirements, consider available equipment, and make an informed choice. Whether you choose the robustness and simplicity of the mechanical grabs or the accuracy of the hydraulic grabs, remember that the right grab can increase productivity and ensure smooth operation.

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Dafang Crane offers a wide range of hydraulic and mechanical grabs, including various types of automated grabs designed to meet diverse needs. Whether you’re looking for efficient solutions for heavy lifting or specialized applications, we have the right equipment for you. Click on the image link below to explore our full selection and find the perfect grab for your business needs.

크레인 어플리케이션을 위한 15가지 다양한 그랩 버킷.