Product Description

Mechanical Grab — Enhanced Product Description

Mechanical Grab – Main Purpose, Application Scenarios & Key Features

Main Purpose

The Mechanical Grab is designed for efficient handling of bulk commodities such as ore, coal, aggregates, sand, grain, and other loose materials. Its rope-driven opening and closing mechanism makes it ideal for continuous loading and unloading operations, especially where hydraulic power is not available.

Compared with powered grab systems, a mechanical grab provides a stable and cost-effective solution for bulk cargo handling in ports, terminals, and storage facilities.

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Technical parameters

Total lifting capacity (t)			6.3	8	10	12.5	16	20	25
Weight (Kg)	4x rate		2300	2800	3440	4500	5600	7360	8800
	5x rate		2460	2880	3600	4660	5760	7520	9000
Capacity     (m3)	4x rate		2.5	3.2	4	5	6.5	7.9	10.1
	5x rate		2.4	3.2	4	4.9	6.4	7.8	10
Pulley	Diameter(mm)		355	400	450	500	560	630	630
Steel Wire Rope	Diameter(mm)		18	20	22	24	26	28	32
	Length (m)	4x rate	11.5	12.8	13.8	15	16.5	17.8	18.6
		5x rate	14	15.5	16.8	18.5	20.5	21.8	23
	Journey (mm)	4x rate	5940	6600	7100	7680	8520	8920	9760
		5x rate	7425	8250	8875	9600	10650	11150	12200
External dimensions(mm)	A		3080	3430	3700	4010	4380	4770	4990
	B		2600	2900	3100	3350	3640	4020	4120
	C		2220	2410	2610	2850	3070	3270	3530
	D		2540	2760	2950	3160	3450	3680	3910
	E		1800	1930	2070	2220	2420	2580	2730
	F		460	600	800	1000	1100	1280	1280
	G		380	430	480	530	590	670	670

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Typical Application Scenarios

The Mechanical Grab is widely used in heavy-duty environments where large volumes of bulk materials need to be moved quickly and safely:

• Port cranes for vessel loading and unloading

• Bulk carrier ships handling coal, ore, and grain

• Storage yards and stockpiles for material transfer

• Railway and truck loading stations

• Industrial plants requiring bulk feeding operations

Its compatibility with single-rope or double-rope crane systems also allows flexible integration into existing lifting equipment without extensive modification.

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Key Features & Advantages

The Mechanical Grab offers several practical benefits that make it one of the most widely used bulk-handling tools in port logistics and industrial operations:

1. Simple & Robust Structure

Fewer components mean lower wear, stronger durability, and reduced failure rates—ideal for long-term continuous work.

2. Easy Maintenance

No hydraulic hoses, pumps, or motors. Routine parts replacement and lubrication are straightforward, helping reduce downtime and maintenance costs.

3. Widely Compatible with Rope Crane Systems

Available for both single-rope and double-rope configurations, making it suitable for many types of harbor and shipboard cranes.

4. High Efficiency for Bulk Materials

Optimized for materials with good flow characteristics, allowing fast loading cycles and high throughput in port and storage yard operations.

5. Cost-Effective for Large-Scale Operations

A mechanical grab typically delivers lower upfront investment and minimal maintenance expenses, making it an economical solution for high-volume handling.

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Optional Customizations

To fit different working conditions and crane types, Mechanical Grabs can be customized for:

• Grab capacity (from 1–20 m³)

• Shell shape (open, semi-closed, fully closed)

• High-strength wear-resistant steel

• Corrosion-resistant treatment for marine environments

• Rope system compatibility