Reach Stacker Luffing Cylinder
Reach Stacker Luffing Cylinder
The luffing cylinder is the muscle that lifts the boom — and everything hanging from it. A 45-tonne loaded container at the end of a 15-metre boom creates enormous forces at the boom pivot. The luffing cylinder pushes through 5,000 mm of stroke, raising the load from ground level to 5-high stacking height.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Reach Stacker Luffing Cylinder |
| Features | Up-and-down tilting (luffing) of the boom |
| Bore Diameter | 100 mm – 220 mm |
| Rod Diameter | 60 mm – 140 mm |
| Stroke | Up to 5,000 mm |
| Working Pressure | Maximum 30 MPa |
| Application | Reach Stacker |
Why the Luffing Cylinder Is the Most Stressed Component on a Reach Stacker
The luffing cylinder carries the combined weight of the boom, the telescopic extension, the spreader, and the container — multiplied by the boom length as a moment arm. At maximum reach (boom fully extended at 15+ metres), a 45-tonne container creates a moment of over 6,600 kNm at the boom pivot. The luffing cylinder must resist this moment through its stroke range while also absorbing the dynamic loads from container swing, wind gusts, and ground irregularities.
This makes the luffing cylinder the most heavily loaded cylinder on the reach stacker — and the most critical for safety. A luffing cylinder failure under load would allow the boom to drop uncontrolled, risking catastrophic damage to containers, equipment, and personnel.
Korea Ever-Power specifies integrated load-holding valves on every reach stacker luffing cylinder — preventing boom drop under any failure condition. Browse the offshore hydraulic cylinder range for the telescopic (#24) and steering (#26) cylinders.
Key Advantages of the Luffing Cylinder
- Mandatory load-holding valves — integrated into the cylinder body. Prevents boom drop under hydraulic hose failure, pump failure, or valve malfunction. A safety-critical requirement for all reach stacker operations.
- Wide bore range (100–220 mm) — covers reach stackers from small 25-tonne models (100 mm bore) to heavy 45-tonne models (220 mm bore). The bore is calculated from the maximum boom moment and working pressure.
- High-fatigue design — rated for the continuous-duty cycle profile of container handling (20–30 lifts per hour, 16–24 hours per day). Critical stress points (rod-piston connection, trunnion welds) are FEA-verified for fatigue life.
- ️ Anti-corrosion rod treatment — chrome or ceramic. The rod is exposed during every lifting cycle and must withstand port dust, rain, and salt air for 10,000+ operating hours between major overhauls.
Luffing Cylinder OEM & ODM
Provide the stacker model, maximum SWL, boom geometry, maximum stacking height, and system pressure. Korea Ever-Power delivers individually or as part of the complete reach stacker set (telescopic + luffing + steering). Contact the Korea Ever-Power hydraulic cylinder team.
Frequently Asked Questions
What Our Customers Say
"The luffing cylinders on our 45-tonne reach stacker handle 4th-row, 4-high stacking operations daily. The integrated load-holding valves passed our annual safety test with zero pressure decay over 15 minutes."
Eng. F. Mueller — Safety Inspector, German container terminal
"Complete reach stacker cylinder set (telescopic + luffing + steering) for 2 new stackers. Korea Ever-Power delivered everything in one shipment. All cylinders bolted straight into our SANY reach stackers."
W. Li — Equipment Procurement, Chinese port authority
"Solid luffing cylinders. The 180 mm bore handles our 35-tonne operations with comfortable margin. One observation: the cylinder weight (280 kg each) requires a small crane for installation — plan accordingly."
J. Mensah — Workshop Foreman, Ghanaian port
"The ceramic rod coating is proving its value in our coastal port. Our previous hard-chrome cylinders needed rod replating every 3 years. The ceramic rods show no wear after 18 months."
M. Fernandez — Maintenance Director, Argentine container terminal
"Replacement luffing cylinders for aging Fantuzzi reach stackers. Korea Ever-Power matched the original mounting dimensions and upgraded the seals and load-holding valves. Better performance than the originals."
S. Petrov — Fleet Manager, Russian port logistics
Related Hydraulic Cylinder Categories
Informazioni aggiuntive
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