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4 Ton Knuckle Boom Marine Crane with Compact Design and Efficient Deck Operations1
Crane, Compact Marine Crane, 4 Ton Deck Crane
Xuzhou SKPL-LIFT Heavy Industry Machinery Technology Co., Ltd.
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Product DescriptionProduct DescriptionTechnical ParameterModel nameSQ5ZB3MWMax.Lifting Capacity5000 KgMax.Lifting Moment11 Ton.mHydraulic System Pressure28 MpaHydraulic System Flow40 L/minSlewing Angle360° FRReconmmend Power30 KwOil Tank Capacity100 LCrane Self Weight1800 KgKnuckle Boom Marine Crane: 5-Ton Heavy-Duty Lifter Designed for Harsh Offshore OperationsEngineered to excel in demanding marine environments, this Knuckle Boom Marine Crane delivers robust 5-ton lifting capacity for efficient cargo handling, equipment installation, and daily operations on board. Its advanced winch system ensures fast and reliable hoisting and lowering, significantly improving workflow efficiency even under challenging conditions. The highly flexible knuckle boom design enables multi-angle positioning, offering exceptional maneuverability within the tight confines of vessel decks. With a multi-section telescopic boom that extends to provide an extensive working radius, it adapts seamlessly to various sea states and lifting requirements. Constructed with high-strength steel and built to endure impacts and harsh oceanic elements, this crane guarantees long-lasting structural integrity and performance. Operators benefit from precise control through hydraulic proportional valves or wireless remote systems, ensuring smooth and accurate load management. Its compact installation preserves valuable deck space without interfering with vessel functions, while quick deployment features maximize operational readiness. Supporting a range of attachments including hooks, grabs, and personnel baskets, it serves multiple onboard functions. Critical safety systems such as load moment limitation, over-hoisting protection, anti-tipping stabilization, and an emergency stop mechanism ensure secure operation amidst vessel motion. Specially treated with optional galvanization and marine-grade anti-rust coatings (epoxy zinc-rich primer and topcoat), it resists saltwater corrosion effectively. Designed for all-weather reliability and compatibility with fishing, cargo, supply ships and docks, this crane offers full customization including boom length, winch speed, and corrosion protection levels to match specific vessel and mission profiles.Main ProductsCompany ProfileSKPL-LIFT has been deeply engaged in the truck-mounted crane industry for 18 years. The company operates a 40,000 m2 crane manufacturing campus equipped with nine internationally advanced production lines—a modern base integrating manufacturing, R&D, and product showcasing—providing a solid guarantee for both product quality and production capacity.As a professional crane manufacturer and supplier, we are committed to delivering fully customized lifting solutions. From initial requirement discussions to final installation and commissioning, we ensure seamless coordination to meet the operational needs of multiple sectors, including construction, manufacturing, and port lifting.Our manufacturing process follows a rigorous and controlled approach. Industrial designs are developed using 3D modeling and finite element analysis to ensure scientific precision. Raw materials are carefully selected before undergoing laser cutting (accuracy up to 0.1 mm), CNC machining, grinding and polishing, robotic welding, and multi-layer eco-friendly coating and curing. Prior to delivery, every product undergoes comprehensive load testing under simulated working conditions to ensure safety performance meets the highest standards.With exceptional capabilities and stringent quality control, SKPL-LIFT has obtained ISO9001 Quality Management System certification and CE certification, and has participated in drafting national industry standards for truck-mounted cranes. Our advanced hydraulic transmission system delivers rapid response and powerful performance for efficient lifting operations, with minimal positioning error, ensuring smooth load hoisting and movement. At the same time, our cranes achieve significant weight reduction while greatly increasing load capacity, offering excellent fatigue resistance for long-term operation under demanding conditions.Our FactoryCompany AdvantageCertificationsOur ServicesPackaging & ShippingFAQ1. Are you a factory or a trading company?We are an integrated factory and trading company, capable of providing long-term technical and after-sales support. SKPL-LIFT is committed to offering one-stop procurement and technical solutionssheme support to ensure the smooth operation of your work and business. You are welcome to visit our factory. 2. What are your payment terms? We support 30% deposit via T/T (telegraphic transfer), MIC platform payment, and L/C (sight letter of credit). For customers with long-term cooperation experience, we offer more favorable delivery policies. 3. What is your delivery time? Usually, delivery is within 30 working days after receiving the deposit. For standard products, we always have stock and"Can deliver within 15 working days. However, customized products will require more time, with specific dates depending on your order requirements. 4. How long do you provide after-sales support? We provide lifelong online technical support, a 1-year product warranty, and paid extended warranty options. 5. How many years has your factory been in this industry? We have 18 years of experience in design, manufacturing, and domestic and international trade, with our products exported to over 100 countries and regions, earning consistent praise from customers.
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