3T Offshore Knuckle Boom Crane

The 3-Ton Offshore Knuckle Boom Crane from OUCO is engineered for efficient and precise material handling on offshore platforms, vessels, and marine support ships.
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The 3-Ton Offshore Knuckle Boom Crane from OUCO is engineered for efficient and precise material handling on offshore platforms, vessels, and marine support ships. Designed for use in Sea Condition Grade 4 (wave heights up to ~2 m), this crane combines compactness with robust performance, making it ideal for load transfers, supply handling, and subsea operations in demanding ocean environments.

Key Features & Benefits:

  • Rated Capacity & Reach:

With a Safe Working Load (SWL) of 3 tons, and an adjustable working radius spanning approximately 2.5 m to 15 m, this crane works well within compact deck zones while covering sufficient outreach for general offshore lifting.

  • Efficient Hoist & Slewing Performance:

The crane delivers hoisting speeds of 18–20 m/min and hook travel up to 25 m, enabling rapid cargo transfers. With 360° continuous slewing at 0.8–1.0 r/min, it provides full rotational flexibility for precise load positioning.

  • Articulated Knuckle Design:

The knuckle boom architecture enables the jib to fold inward, reducing deck footprint and minimizing pendulum motion when engaging loads. This design enhances compact stowage and improves safety when working near vessel structures.

  • All-Weather Reliability:

Engineered for Sea State 4, the crane maintains stable operation under dynamic sea motion, with oil-filled cylinders, corrosion-resistant coatings, and sealed hydraulic circuits that resist saltwater intrusion and environmental wear.

  • Safety & Control Systems:

Equipped with hydraulic safety valves, overload protection, and emergency-stop functionality, the crane ensures operator safety in critical conditions. Control options include radio remote control and onboard console stations for flexible operation.

Product Pictures

Parameters

No.Parameter CategorySpecification
1Safe Working Load (SWL) (See Loadchart)3t
2Max. Working Radius15m
3Min. Working Radius~2.5m
4Hoisting Speed18~20m/min
5Hoisting Travel25m
6Slewing Speed0~0.5r/min
7Slewing Sector360°
8Average Luffing Time~90s
9Max. Heel/Trim8°/4°
10Working Wind Speed≤20m/s

Stowing Wind Speed≤55m/s

Max. Roll/Pitch (Stowing)30°/8°
11Motor22kW

Power Supply440V / 60Hz / 3Ph

Duty CycleS1 / IP56 / F
12Ambient Temperature-10℃~+50℃
13Crane ModelOffshore Crane
14Deck Load - Max. Capsizing Moment1400 kN·m

Deck Load - Max. Turning Moment260 kN·m

Deck Load - Max. Vertical Force170 kN

Deck Load - Dead Weight~11t

Deck Load - Overall Dimensions (L×W×H)16000×2500×5200
15Area ClassificationSafe Area
16Sea ConditionGrade 4

GA Drawing

Company Overview

Founded in 1984, OUCO INDUSTRY is a leading manufacturer and supplier of high-quality marine equipment, specializing in cranes, lifting systems, and material handling solutions. With over 40 years of experience, we are known for delivering innovative and reliable products that meet the specific needs of the maritime industry. Our products are trusted by clients worldwide, including those in the luxury yacht, offshore, port, and industrial sectors.

Located in Jiangsu Province, China, our state-of-the-art manufacturing facility spans 48,000 square meters and is equipped with advanced machinery and a team of over 150 skilled professionals. We are committed to ensuring that every product we deliver is engineered to the highest standards of quality, performance, and safety.

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