Reach Stacker Telescopic Cylinder

Reach Stacker Telescopic Cylinder Manufacturer — Bore 200–220 mm, Stroke to 8000 mm

This cylinder is the linear drive for a reach stacker boom: hydraulic pressure enters the largest stage first, and each successive stage extends in sequence to give a long, controlled stroke from a compact closed length. That telescoping action is what allows the boom to be raised, extended and held while the spreader is positioned over a container — the operation that decides how many containers a terminal moves per shift.

Raydafon produces this cylinder in its own factory in Ningbo, China, for both OEM and aftermarket supply. Standard bore diameters are 200 mm to 220 mm with rod diameters of 150 mm to 180 mm, maximum stroke up to 8000 mm and a maximum working pressure of 30 MPa. If your machine uses a different stage combination or mounting arrangement, send the original drawing or the machine model and we will match it. Related hydraulic cylinders from the same factory include the wider telescopic hydraulic cylinders range and the mobile crane hydraulic cylinders family.

Technical Specifications

• Product nameReach stacker telescopic cylinder
• FunctionLinear telescopic movement of the boom
• Bore diameter200 mm – 220 mm
• Rod diameter150 mm – 180 mm
• Maximum stroke≤ 8000 mm (telescopic extension length)
• Maximum pressure30 MPa working pressure
• ApplicationReach stacker
• MountingTo machine drawing — pin, flange or clevis arrangement
• CustomisationStage count, stroke, bore, rod, mounting and port position

Please note on stroke and pressure: the 8000 mm figure is the cylinder's telescopic stroke, not the machine's lift height — overall lifting height depends on the boom geometry of your specific reach stacker. The 30 MPa figure is the cylinder's maximum working pressure; confirm the rated pressure of your machine's hydraulic system so the cylinder is selected against the pressure it will actually see in service.

How a Telescopic Cylinder Works on a Reach Stacker

A telescopic cylinder differs from a single-stage cylinder in one important way: instead of one piston and one rod, it uses a series of nested stages that extend in order. The largest stage has the greatest effective area and therefore produces the highest force, so the heaviest part of the lift — breaking the load away and starting the boom upwards — is handled by the stage with the most mechanical advantage. As the stages extend, effective area decreases and force falls while travel increases, which matches the way a boom's load moment changes as it rises.

That arrangement also solves a packaging problem. A single-stage cylinder with an 8-metre stroke would need a closed length approaching its stroke, which would never fit along the boom. Nested stages give the same stroke from a fraction of the closed length, which is why reach stackers, mobile cranes and tipper trailers all use telescopic cylinders rather than long single-stage ones.

Two design details decide service life in this application. The first is sealing: every stage carries its own seal set and guide, and the stage-to-stage fit must hold alignment so the seals are not loaded sideways. The second is surface condition: the exposed rod and stage surfaces are what the seals run against, so scoring from grit or a bent stage leads directly to leakage. Correct filtration and regular inspection of the wiper seals matter as much as the cylinder itself when a machine runs long shifts at a port.

Product Detail

Photographs of the reach stacker telescopic cylinder we produce — stage arrangement, rod surface and the mounting interface.

Product Benefits

• Long reach from a short closed lengthMulti-stage construction delivers up to 8000 mm of stroke while keeping the retracted cylinder compact along the boom, so the machine can place the spreader at height and at distance without carrying a longer, heavier single-stage cylinder.
• Force where the lift needs itThe largest stage provides the highest force at the start of the lift, when the load moment on the boom is greatest, and the smaller stages provide the travel. That matches cylinder output to the machine's actual load curve.
• Built for heavy container dutyThe cylinder is produced from high-quality special steel and is designed for the continuous working cycles of port operations, with the sealing arrangement specified for long shifts under load rather than intermittent use.
• Factory-direct supplyThe cylinder is manufactured and assembled in Raydafon's own factory, so there is no trading margin between you and production, and drawings, seals and spare parts remain available for the life of the machine.
• Made to your machine's drawingBore, rod, stroke, stage count, mounting arrangement and port positions can be produced to the original drawing, which matters for replacement units where the mounting interface must match an existing boom.
• Shortens loading and unloading cyclesAccurate, repeatable positioning of the spreader lets a container be lifted from the quay or the deck and set down in fewer movements, cutting the time each vessel spends at the berth and the waiting time for road vehicles at the terminal.

Fatigue life, seal life and maximum force depend on bore, pressure, duty cycle and how well contamination is controlled in the machine's hydraulic circuit. Give us the machine model, working pressure and required stroke, and we will confirm the cylinder configuration against the load it will actually see.

Applications

The primary application is the boom of a container reach stacker, but the same telescopic cylinder type is used wherever a long stroke has to be produced from a short mounting length in a mobile machine.

Buyer FAQ

• What bore, stroke and pressure does this reach stacker telescopic cylinder cover?Standard bore diameters are 200 mm to 220 mm, rod diameters 150 mm to 180 mm, maximum stroke up to 8000 mm and maximum working pressure 30 MPa. Overall lifting height depends on the boom geometry of your machine, not on the stroke alone, so confirm both when specifying.
• Is this cylinder an OEM part or a replacement?It is manufactured by Raydafon in its own factory and can be supplied as OEM fitment for machine builders or as a replacement unit for machines already in service. For replacement, send the original drawing, the machine model or the measured dimensions of the failed cylinder.
• How do I know the mounting will match my boom?Mounting is made to drawing — pin, flange or clevis arrangement, together with port positions. Send the drawing or a photograph of the existing cylinder with its principal dimensions and we will confirm the interface before quoting.
• What information do you need to quote?Machine model, bore and rod diameter, required stroke, working pressure, stage count if it is a multi-stage design, mounting type and quantity. The more of these we receive with the inquiry, the faster we can confirm the design and price.
• What affects the service life of a telescopic cylinder?Hydraulic oil cleanliness, the condition of the wiper seals and the alignment of the individual stages are the main factors. Contamination or a scored stage surface damages the seals and leads to leakage, so filtration and regular inspection matter as much as the cylinder specification itself.
• What is the lead time and can spare seals be supplied?Lead time depends on whether the cylinder matches an existing drawing or needs a new configuration, and is confirmed with the quotation, normally within 24 hours of receiving the inquiry. Seal kits and replacement components can be supplied separately so a machine can be returned to service after a seal failure.

Related Products and Further Reading

• Telescopic hydraulic cylinders — the full multi-stage range for cranes, tippers and mobile machinery.
• Hydraulic cylinder — the complete hydraulic cylinder catalogue, including single-stage designs.
• Mobile crane hydraulic cylinders — boom and outrigger cylinders for mobile lifting equipment.
• Ro-Ro platform main operating cylinder — a heavy port-equipment cylinder from the same factory.