Name: Ro-Ro Platform Jacking Cylinder - Korea Ro-Ro Platform Jacking Cylinder Manufacturers, Suppliers - hydraulic cylinders price
SKU: 5b65b7002e35

Ro-Ro Platform

Ro-Ro Platform Jacking Cylinder

The ramp reaches the quay — but the height is off by 200 mm. Vehicles cannot drive on safely. The jacking cylinder makes the final height adjustment at the ramp tip, bridging the gap between vessel deck and quay surface with millimetre precision.

50–125mmBore

≤1,000mmStroke

361 KNThrust

29.4 MPaPressure

Technical Specifications

Parameter	Specification
Product Name	Ro-Ro Platform Jacking Cylinder
Features	Fine height adjustment of the ramp tip
Bore Diameter	50 mm – 125 mm
Rod Diameter	25 mm – 75 mm
Stroke	Up to 1,000 mm
Thrust Force	Maximum 361 KN (bore 125 mm / 29.4 MPa)
Working Pressure	Up to 29.4 MPa
Application	Ro-Ro Platform

Why Precise Ramp Height Matching Matters

Ro-Ro Platform Jacking Cylinder

Vehicles driving onto a ro-ro vessel traverse the ramp at the transition point between the fixed quay and the moving vessel. If the ramp tip height does not match the quay surface, vehicles experience a step — a sudden height change that can bottom out low-clearance vehicles, damage cargo, or create an unsafe gradient for heavily loaded trucks.

The jacking cylinder provides up to 1,000 mm of height adjustment at the ramp tip, compensating for tidal changes during loading (the vessel rises as cargo is removed), vessel draft changes, and differences between ports. The adjustment must be continuous during loading — as each vehicle drives on, the vessel draft changes, and the ramp tip height must follow.

The jacking cylinder works in coordination with the main operating cylinder (#13) — the main cylinder positions the ramp approximately, and the jacking cylinder makes the final precision adjustment. Browse the offshore hydraulic cylinder range for the complete ro-ro system.

Key Advantages of the Jacking Cylinder

Millimetre-level positioning — proportional valve control allows the ramp tip to be positioned within ±5 mm accuracy, providing a smooth vehicle transition at all loading conditions.
⚡ Continuous adjustment during loading — as each vehicle drives on or off, the vessel draft changes. The jacking cylinder compensates in real time, maintaining a level transition surface throughout the loading cycle.
Compact size — the smallest cylinder in the ro-ro hydraulic system (bore 50–125 mm, stroke ≤1,000 mm). Fits into the tight space at the ramp tip where the ramp structure is narrowest.
️ Load-holding capability — the cylinder holds the ramp tip at the set height while vehicles traverse it. Load-holding valves prevent any tip sag under vehicle wheel loads (up to 15 tonnes per axle on heavy cargo vehicles).

Jacking Cylinder OEM & ODM

Korea Ever-Power supplies jacking cylinders individually or as part of the complete ro-ro ramp cylinder set (main operating + latch + jacking). Provide the ramp tip weight, height adjustment range, mounting space, and DNVGL or other class requirement. Contact the Korea Ever-Power hydraulic cylinder team.

Frequently Asked Questions

How does the jacking cylinder differ from the main operating cylinder?

The main operating cylinder (#13) handles the full ramp movement (bore 100–400 mm, stroke up to 7,300 mm). The jacking cylinder provides the final precision height adjustment at the ramp tip (bore 50–125 mm, stroke up to 1,000 mm). The main cylinder does the heavy work; the jacking cylinder does the precision work.

How many jacking cylinders does a ramp use?

Typically 1–2 jacking cylinders per ramp, located at the ramp tip. A single cylinder is sufficient for most installations; 2 are used on wider ramps or where redundancy is required.

Can the jacking cylinder handle vehicle wheel loads?

The jacking cylinder is designed to hold the ramp tip under vehicle traffic loads. Load-holding valves prevent tip sag when heavy vehicles (up to 60 tonnes gross weight) traverse the ramp tip.

What classification approvals are available?

DNVGL, BV, LR, ABS. The jacking cylinder is part of the ramp safety system and must meet the same classification requirements as the main operating and latch cylinders.

Can the complete ro-ro cylinder set be ordered together?

Yes — main operating (#13), latch (#14/#15), and jacking (#16) cylinders are available as a single-source package with coordinated documentation. Browse the offshore hydraulic cylinder range for all ro-ro products.

What Our Customers Say

★★★★★Jun 2026

"The jacking cylinders provide smooth, precise height adjustment on our stern ramp. Our drivers no longer complain about the step at the ramp-to-quay transition. Positioning accuracy is within 5 mm — measured with a laser level."

Capt. P. Andersen — Port Captain, Norwegian coastal ferry

★★★★★Feb 2026

"Compact and reliable. The 80 mm bore jacking cylinder fits perfectly in the tight space at the ramp tip. We use it on 3 identical ferries — consistent quality across all orders."

K. Mikkelsen — Fleet Engineer, Danish island ferry operator

★★★★☆Oct 2025

"Good jacking cylinders at a fair price. We ordered them as part of the complete ramp set (main + latch + jacking). All 3 types arrived together, all documentation aligned. Minor point: the bore 50 mm variant was slightly underpowered for our heavy-truck ramp — recommend 80 mm minimum for cargo ferries."

A. Petridis — Technical Director, Greek cargo ferry

★★★★★Jul 2025

"The load-holding on the jacking cylinder handles our 50-tonne truck traffic without any tip sag. We previously had issues with the ramp tip bouncing under heavy axle loads — the new valve setup eliminated that completely."

M. Torres — Port Operations Manager, Spanish ro-ro terminal

★★★★★Mar 2025

"Replacement jacking cylinders for a 12-year-old ferry. Korea Ever-Power matched the original mounting geometry from our drawings. The new cylinders responded noticeably faster than the worn originals — smoother height tracking during tidal changes."

J. O'Brien — Chief Engineer, Irish Sea ferry