6.3 Ton Knuckle Boom Marine Crane

FF130KC-4A 6.3-Ton Marine Knuckle Boom Crane

Limited deck space and the accelerated wear caused by highly corrosive marine environments are common industry challenges; shipowners often face the dilemma of choosing between telescopic and knuckle boom cranes. Our Marine Knuckle Boom Crane is specifically designed to meet lifting needs in confined deck spaces. It offers a maximum lifting capacity of 6.3 tons at a 2.1-meter radius and a rated lifting moment of 13 ton-meters. Featuring a 4-section knuckle boom structure, it achieves a maximum working radius of 9.8 meters and a maximum lifting height of 11.5 meters, while supporting full 360° rotation. With a net weight of only 2,020 kg, its lightweight design minimizes the load on the vessel's hull. The hydraulic system operates at a rated pressure of 28 MPa with a flow rate of 35 L/min (recommended power: 18 kW), and the unit utilizes an integrated standing control station for stable, convenient operation. The boom can be folded inward to significantly reduce its footprint when stowed, making it ideal for fishing vessels, patrol boats, and supply ships—suitable for tasks such as material replenishment, deck equipment maintenance, and cargo handling. Within the same series, we also offer ship telescopic boom cranes, grab cranes, and forestry cranes (log loaders) to meet diverse lifting and handling requirements across marine and forestry sectors. The equipment supports marine-grade anti-corrosion coating and customizable base dimensions to suit various vessel installation specifications.

Product Features

1. Lightweight design (deadweight: 2,020 kg) with a folding four-section boom; the stowed configuration saves deck space.

2. 360° continuous slewing; stable hydraulic system parameters ensure flexible operation under complex marine conditions.

Usage Tips

1. Before operation, verify the rated load for the specific working radius against the load chart; overloading is strictly prohibited.

2. Before extended periods of inactivity, apply anti-rust protection to hydraulic lines; change hydraulic oil regularly to mitigate salt spray corrosion.

FAQ

Q1: Can the base mounting dimensions of this Marine Knuckle Boom Crane be modified based on vessel deck drawings?

A1: Yes, base dimensions and configurations can be customized based on the client's hull drawings; anti-corrosion coatings are also available as an option.

Q2: Which parts require priority inspection during routine maintenance, and what is the maintenance interval?

A2: Focus inspections on hydraulic hoses, hinge pins, and hydraulic locks. For standard marine environments, we recommend changing the hydraulic oil every 300 hours and checking for leaks before every voyage.

Q3: What is the after-sales warranty period, and how can overseas customers obtain spare parts?

A3: The standard warranty period is one year. We supply core hydraulic components and offer bundled spare parts shipments along with remote technical guidance.

Q4: How does this compare to a telescopic boom crane, and what type of vessel is it best suited for?

A4: This Knuckle Boom Crane is ideal for vessels with limited deck space or operations requiring lifting around obstacles. Telescopic boom cranes are better suited for applications requiring long-reach, straight-extension lifting. Grab machines and forestry cranes (log loaders) are primarily used for material handling and log lifting operations.