{"id":1817,"date":"2026-09-09T06:27:01","date_gmt":"2026-09-09T06:27:01","guid":{"rendered":"https:\/\/metalite.net\/?post_type=product&p=1817"},"modified":"2026-09-09T07:15:40","modified_gmt":"2026-09-09T07:15:40","slug":"hcyy11112015-hook-lift-telescopic-hydraulic-cylinder","status":"publish","type":"product","link":"https:\/\/metalite.net\/uk\/product\/hcyy11112015-hook-lift-telescopic-hydraulic-cylinder\/","title":{"rendered":"Hook Lift Telescopic Hydraulic Cylinder \u2013 Model HCYY11112015 | \u03a6100\u00d7\u03a660\u00d71100, 30 MPa"},"content":{"rendered":"

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Model HCYY11112015<\/p>\n

Hook Lift Telescopic Hydraulic Cylinder<\/h2>\n

\u03a6100 \u00d7 \u03a660 \u00d7 1100 mm \u00b7 30 MPa working pressure \u00b7 90 kg \u2014 Multi-stage extension that bridges the gap between tilt geometry and real-world container reach.<\/p>\n

\u03a6100 mm Bore<\/span>
\n1100 mm Stroke<\/span>
\n30 MPa \/ 35 MPa<\/span>
\nTelescopic Design<\/span><\/div>\n<\/div>\n

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\"HCYY11112015<\/div>\n
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Why Hooklift Trucks Need a Telescopic Cylinder \u2014 Not Just a Longer Tilt Cylinder<\/h2>\n

Here’s a question that comes up more often than you’d expect: if the tilt cylinder already has a 1925 mm stroke, why does the hooklift system need a separate telescopic hydraulic cylinder<\/strong> at all? The answer is geometry \u2014 specifically, the problem of getting a hook from a steeply tilted arm position to a point low enough to engage a container sitting on flat ground, without the arm itself becoming so long it becomes structurally impractical.<\/p>\n

The hook lift telescopic cylinder<\/strong> (HCYY11112015) solves this by adding a second stage of extension that deploys independently of \u2014 or in sequence with \u2014 the tilt cylinder. With a \u03a6100 mm bore and a 1100 mm stroke collapsing into a 1400 mm installation distance, this cylinder extends the functional reach of the hooklift arm without adding proportional length to the subframe or the vehicle’s overall chassis overhang.<\/p>\n

At 90 kg, the HCYY11112015 sits in the middle of the hooklift cylinder family by weight \u2014 heavier than the 4.2 kg body lock cylinder, lighter than the 290 kg tilt cylinder \u2014 which reflects its intermediate role in the load cycle. It doesn’t lift the container alone, but without it, many hooklift systems simply can’t reach far enough to engage a container that’s been set down on flat ground with any horizontal offset from the truck’s rear.<\/p>\n

The telescoping design is also what makes the cylinder’s retracted footprint disproportionately compact<\/strong>: 1400 mm center-to-center when closed, yet capable of delivering 1100 mm of working stroke. That ratio \u2014 just over 1.27:1 extension factor for a single-stage telescopic \u2014 is a key packaging advantage over a conventional single-rod cylinder of equivalent stroke.<\/p>\n

\"Telescopic<\/p>\n

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Technical Specifications \u2014 HCYY11112015 Telescoping Hydraulic Cylinder<\/h2>\n
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Parameter<\/th>\nValue<\/th>\nEngineering Context<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nHCYY11112015<\/td>\nHooklift telescopic extension cylinder series<\/td>\n<\/tr>\n
Bore \u00d7 Rod \u00d7 Stroke<\/td>\n\u03a6100 \u00d7 \u03a660 \u00d7 1100 mm<\/td>\nTelescopic stage delivers 1100 mm reach from a 1400 mm closed body<\/td>\n<\/tr>\n
Working Pressure<\/td>\n30 MPa<\/td>\nPush force \u2248 236 kN at \u03a6100 bore \/ rated pressure<\/td>\n<\/tr>\n
Max Withstand Pressure<\/td>\n35 MPa<\/td>\n17% safety margin; each stage independently tested<\/td>\n<\/tr>\n
Stroke (Trip)<\/td>\n1100 mm<\/td>\nTotal extended travel across all telescopic stages<\/td>\n<\/tr>\n
Installation Distance<\/td>\n1400 mm<\/td>\nRetracted center-to-center; extension ratio \u2248 1.79\u00d7 closed length<\/td>\n<\/tr>\n
Weight<\/td>\n90 kg<\/td>\nMid-range \u2014 balanced between structural rigidity and arm inertia<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"Cross-Section<\/p>\n

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236 kN<\/p>\n

Push force at 30 MPa<\/p>\n<\/div>\n

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1.79\u00d7<\/p>\n

Extension ratio (stroke \u00f7 install. dist.)<\/p>\n<\/div>\n

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1100 mm<\/p>\n

Total working stroke<\/p>\n<\/div>\n

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35 MPa<\/p>\n

Max withstand pressure<\/p>\n<\/div>\n<\/div>\n

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Telescopic vs. Single-Rod: The Packaging Advantage That Changes Truck Design<\/h2>\n

To understand why a telescoping hydraulic cylinder<\/strong> earns its place in a hooklift system, consider the alternative: a conventional single-rod cylinder with the same 1100 mm stroke would require a minimum retracted length of roughly 1600\u20131800 mm (depending on rod diameter and end connection design). That’s 200\u2013400 mm more subframe length consumed by cylinder packaging alone \u2014 space that has a direct cost in vehicle chassis design, body-to-cab clearance, and legal overall vehicle length limits.<\/p>\n

With the HCYY11112015 retracted to 1400 mm and extending to deliver 1100 mm of stroke, the extension ratio of 1.79\u00d7<\/strong> means the cylinder delivers nearly 80% more travel than its closed body length. This is the core value proposition of telescopic design in vehicle applications: you get the stroke you need without the chassis penalty.<\/p>\n

The \u03a6100 mm outer bore and \u03a660 mm inner stage are sized to maintain adequate wall thickness across both stages at 30 MPa. The 5:3 bore-to-rod ratio is a deliberate compromise between push force on the first stage (236 kN at \u03a6100) and pull\/retraction force on the inner stage \u2014 in most hooklift systems, retraction of this cylinder is gravity-assisted by arm weight, so the pull force requirement is modest compared to the extend force needed during container engagement.<\/p>\n

One important nuance specific to telescopic cylinders: extension sequence matters<\/strong>. In a two-stage telescopic, the outer (larger) stage extends first under pressure because it has the larger area and therefore lower pressure required to move. Once the outer stage reaches its end stop, pressure builds and the inner stage extends. This sequential behavior must be accounted for in the hooklift control valve timing \u2014 a poorly-tuned valve can cause the inner stage to slam its end stop, generating pressure spikes that exceed the 35 MPa withstand limit on the inner stage seals.<\/p>\n

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Where the Hooklift Telescopic Cylinder Makes the Difference<\/h2>\n

The need for a telescopic extension cylinder is most acute in hooklift configurations where the truck must engage containers in constrained or offset positions \u2014 the real-world conditions that a simple tilt-only system can’t handle:<\/p>\n

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  • Urban waste collection<\/strong> \u2014 containers set down in tight streets or car parks where the truck can’t reverse precisely to the container centerline; the telescopic stage compensates for horizontal reach variation<\/li>\n
  • Long-container transport<\/strong> \u2014 6\u20137 m roll-off containers where the rear-most engagement point is further from the truck than shorter skip bins; the telescopic extension closes that gap<\/li>\n
  • Multi-drop fleet operations<\/strong> \u2014 trucks cycling multiple containers per shift where fast, consistent arm extension reduces average loading time and operational cost<\/li>\n
  • Ground-level container pickup<\/strong> \u2014 flatbed-positioned containers that sit lower than standard skip feet require maximum arm extension to get the hook low enough to engage<\/li>\n
  • OEM hooklift system builders<\/strong> \u2014 body manufacturers designing systems for multiple chassis platforms where installation distances vary; the telescopic cylinder’s compact retracted length simplifies cross-platform fitment<\/li>\n<\/ul>\n

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    Construction Details \u2014 Telescopic Stage Sealing and Surface Treatment<\/h2>\n
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    Outer Stage Tube<\/p>\n

    \u03a6100 bore, seamless cold-drawn steel (ST52\/E355), precision-honed to Ra \u2264 0.4 \u03bcm. Wall thickness verified by hydrostatic test to 35 MPa before stage assembly.<\/p>\n<\/div>\n

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    Inner Stage \/ Rod<\/p>\n

    \u03a660 mm chrome-plated inner plunger, hard chrome \u2265 20 \u03bcm on all sliding OD surfaces. Both the OD (running in the outer bore) and tip end are finished to the same tolerance class.<\/p>\n<\/div>\n

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    Stage Seal Design<\/p>\n

    Each stage carries an independent PU piston seal set plus a dedicated wiper at its gland. Inter-stage sealing is isolated so that a failure at the outer stage doesn’t immediately compromise the inner stage circuit.<\/p>\n<\/div>\n

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    End Cushioning<\/p>\n

    Hydraulic end cushions fitted at the full-extension stop of each stage, reducing end-of-stroke velocity to < 50 mm\/s to prevent spike pressures and mechanical impact on the stop collar.<\/p>\n<\/div>\n

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    External Finish<\/p>\n

    Two-coat epoxy primer plus polyurethane topcoat on the outer barrel, minimum 80 \u03bcm DFT. Salt-spray rated; compatible with standard fleet wash-down procedures.<\/p>\n<\/div>\n

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    Factory Testing<\/p>\n

    Full stroke function test (3 complete cycles), hydrostatic hold at 35 MPa for 5 minutes per stage, leakage check at 30 MPa working pressure. Test certificate available on request.<\/p>\n<\/div>\n<\/div>\n

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    Hydraulic Cylinder Mounting Position \u2014 Hooklift Truck System<\/p>\n

    \"Schematic<\/p>\n

    The telescopic cylinder extends the arm’s reach during container engagement, compensating for horizontal offset between the truck rear and the container pickup point.<\/p>\n<\/div>\n

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    Installation and Setup Notes for the Roll-Off Truck Telescopic Cylinder<\/h2>\n

    Telescopic cylinders have a few installation considerations that don’t apply to conventional single-rod units \u2014 worth knowing before the first wrench turns:<\/p>\n