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Factory Direct Sale 4 Ton Hydraulic Knuckle Boom Ship Crane Electric Boat Lifting Marine Crane for Hot Sale
| Item | Unit | SQ2ZA1T |
| Max Lifting Capacity | ton | 4 |
| Max Lifting Moment | ton.m | 8.4 |
| Recommend Power | kw | 16 |
| Hydraulic System Flow | L/min | 25 |
| Hydraulic System Pressure | Mpa | 20 |
| Oil Tank Capacity | L | 60 |
| Self weight | kg | 1250 |
| Rotation Angle | . | 360 |
Polygon Boom Profile: Octagonal/hexagonal cross-section delivers superior alignment and high bending resistance.
Baosteel 700 Steel: High-strength steel plates optimize the structural weight-to-strength ratio.
Compact Footprint: Lower deadweight and higher payload with a low center of gravity for enhanced transit stability.
Balanced Hook Pulley: Lateral guide wheels and limit plates ensure uniform force and longer bearing lifespans.
Enlarged Internal Pulley: Maximized diameter improves load-telescoping capability and extends wire rope service life.
Optimized Boom Sliders: Large-scale slider design minimizes specific pressure and reduces boom wear.
Integrated Boom Head: Unified structural design provides significantly higher load-bearing capacity than split alternatives.
Dual-Cylinder Telescopic: Two-cylinder setup with wire rope pulleys protects internal rigging and maintains mid-range capacity.
Telescopic Boom Model: Engineered specifically for heavy-duty lifting operations in open maritime environments.
Knuckle Boom Model: Dual four-bar luffing mechanism with reverse folding excels in confined/narrow spaces.
Negative Angle Operation: Dual knuckle booms feature upward articulation to easily access ultra-low clearance zones.
Quick-Change Attachments: Supports rapid modular coupling with winches, augers, aerial baskets, hydraulic grabs, and cargo forks.
Multi-Scenario Solutions: All-in-one system for marine lifting, drilling, aerial work, demolition, and material handling.
Disc-Spring Braking: Equipped with counter-balance valves and friction brakes for smooth, high-efficiency operations.
Hydraulic Lowering Balance: Utilizes dedicated balance valves to counter loads safely during descent.
Reverse Cylinder Layout: Flange-connected balance valve eliminates exposed external piping, preventing leaks and impacts.
Planetary Gear Motor: Low-speed, high-torque configuration matched with a large-diameter drum.
Dual Planetary Reducer: Delivers exceptionally stable hoisting performance with minimal braking impact.
Multi-Plate Friction Brake: Provides high braking torque, silent operation, and an extended service lifespan.
Smart Load Moment Limiter: Real-time load-ratio tracking with automatic motion cut-off during overload conditions.
Triple Anti-Collision: Features automatic braking, buffer-stop controls, and a wedge-locked anti-backlash device for over-winding/unwinding protection.
Wireless Remote Control: Enables precise, proportional control from up to 50 meters away in complex environments.
High-Position Seating: Provides an unobstructed, zero-blind-spot view for direct and accurate positioning.
Wire Rope Protection: Anti-derailment design on lower pulleys guarantees high stability during hoist cycles.
Are you a manufacturer?
Yes! We are the manufacturer established in 2006 and started selling overseas in 2015.
Offer OEM/ODM service of marine cranes.
Why choose CNS?
Source factory! Save your cost margin to higher quality and machining precision!
12 months warrranty!
Strong R&D team!
Flexible payment term. L/C is highly welcomed.
Cooperated shipping agent, saving more cost.
What is the way for delivery?
Mainly by shipment.
Optional railway for neighborhood countries.
DHL, TNT, UPS,or FedEx for light accessories which are needed urgently.
What are your warranty terms?
12 months or 2000 working hours structural warranty on all our products, except failure caused by improper installation, operation or maintenance, accident, damage which are not caused by CNS.
What is your lead time?
We expanded and rebuilt factory to another 60000sqm to meet higher demand.
Stock order: 3-5 working days,
customized orders within 1-2 weeks.
Contact CNS service team to get an accurate lead time.
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