{"id":1829,"date":"2026-03-13T02:07:24","date_gmt":"2026-03-13T02:07:24","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/?p=1829"},"modified":"2026-03-13T02:07:24","modified_gmt":"2026-03-13T02:07:24","slug":"telescopic-boom-hydraulic-cylinder-for-deck-crane","status":"publish","type":"post","link":"https:\/\/hydrauliccylindersprice.com\/cs\/telescopic-boom-hydraulic-cylinder-for-deck-crane\/","title":{"rendered":"Telescopic Boom Hydraulic Cylinder for Deck Crane"},"content":{"rendered":"

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Telescopic Boom Hydraulic Cylinder for Deck Crane<\/h1>\n

Heavy-duty, multi-stage telescopic hydraulic cylinders built for offshore deck cranes and cargo handling systems. Engineered for saltwater environments and long-stroke reliability.<\/p>\n

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Product Overview<\/h2>\n

When it comes to operating deck cranes on cargo vessels, offshore supply ships, and heavy-lift barges, nothing matters more than the reliability of your telescopic boom hydraulic cylinder<\/b>. These cylinders serve as the muscle behind every lift, extension, and retraction of the crane boom \u2014 translating hydraulic pressure into precise, controlled linear motion across multiple stages. Without a well-built hydraulic cylinder<\/b>, your crane is grounded, and your operations stall.<\/p>\n

Our multi-stage telescopic hydraulic cylinders<\/b> are purpose-built for marine and offshore deck crane applications, with particular focus on the demands of cargo handling in saltwater, high-humidity, and corrosive environments. Every cylinder we produce is manufactured in-house from raw material to final assembly, following strict quality protocols that meet classification society standards. Whether you are outfitting a new vessel in South Korea, retrofitting a crane in Japan, or sourcing replacement hydraulic rams<\/b> for a fleet in Southeast Asia, we offer a direct-from-factory solution with full customization and competitive hydraulic cylinder pricing<\/a>.<\/p>\n

What sets our product apart is the combination of thick-wall alloy steel cylinder tubes, hard chrome-plated piston rods, advanced multi-stage sealing systems, and a deep understanding of the salt fog and vibration conditions found on working vessel decks. We do not simply manufacture cylinders \u2014 we engineer them to last in environments where failure is not an option.<\/p>\n

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Technical Specifications<\/h2>\n

All parameters listed below represent the customizable range we support. Each telescopic boom cylinder<\/b> is tailored to your crane model, vessel class, and operational environment. Send us your drawings or requirements, and our engineering team will finalize the exact configuration.<\/p>\n

Basic Specification Range<\/h3>\n
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Parameter<\/th>\nCustomizable Range<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Bore Diameter<\/td>\n120 mm – 500 mm<\/td>\n<\/tr>\n
Piston Rod Diameter<\/td>\n80 mm – 360 mm<\/td>\n<\/tr>\n
Number of Stages<\/td>\n2 – 5 stages<\/td>\n<\/tr>\n
Total Extended Stroke<\/td>\n2,000 mm – 18,000 mm<\/td>\n<\/tr>\n
Operating Pressure<\/td>\n16 MPa – 35 MPa<\/td>\n<\/tr>\n
Test Pressure<\/td>\n1.5x rated working pressure<\/td>\n<\/tr>\n
Action Type<\/td>\nDouble acting hydraulic cylinder<\/b><\/td>\n<\/tr>\n
Structure Type<\/td>\nMulti-stage telescopic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Mounting Options<\/h3>\n
\n\n\n\n\n\n\n\n\n
Mounting Style<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Trunnion Mount (front\/rear)<\/td>\nMost common for deck crane boom cylinders<\/td>\n<\/tr>\n
Clevis \/ Tang Mount<\/td>\nSuitable for articulating boom sections<\/td>\n<\/tr>\n
Flange Mount<\/td>\nUsed for fixed base installations<\/td>\n<\/tr>\n
Custom per OEM Drawing<\/td>\nWe match your existing crane interface dimensions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Materials and Surface Treatment<\/h3>\n
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Component<\/th>\nMaterial \/ Treatment<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Tube<\/td>\nThick-wall alloy steel (27SiMn \/ ST52 \/ custom grade), honed bore<\/td>\n<\/tr>\n
Piston Rod<\/td>\n42CrMo \/ CK45, hard chrome plated<\/b> (0.03 – 0.05 mm), ground and polished<\/td>\n<\/tr>\n
Piston<\/td>\nDuctile iron or forged steel, wear-resistant coating<\/td>\n<\/tr>\n
Seals<\/td>\nImported polyurethane + PTFE composite, salt-resistant<\/td>\n<\/tr>\n
External Surface<\/td>\nShot blasting + marine-grade epoxy primer + polyurethane topcoat<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Environmental Adaptability<\/h3>\n
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Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Operating Temperature<\/td>\n-30 C to +80 C<\/td>\n<\/tr>\n
Environmental Rating<\/td>\nSalt fog \/ marine corrosion grade<\/td>\n<\/tr>\n
Protection Class<\/td>\nIP65 or higher (customizable)<\/td>\n<\/tr>\n
Vibration Resistance<\/td>\nDesigned for vessel motion and dynamic crane loads<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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How This Telescopic Boom Cylinder Works<\/h2>\n

A multi-stage telescopic hydraulic cylinder<\/b> operates on a straightforward but precisely engineered principle. The cylinder consists of multiple nested tube stages, each fitting inside the one before it \u2014 much like a retractable telescope. When pressurized hydraulic fluid enters the base port, it pushes against the largest-diameter stage first, extending it outward. As that stage reaches full extension, oil flow is redirected to the next smaller stage, which then begins to extend. This sequential extension continues through all stages until the full stroke length is achieved.<\/p>\n

In a double acting<\/b> configuration \u2014 which is the standard for deck crane boom cylinders \u2014 hydraulic oil can be supplied to both sides of the piston assembly. This means the cylinder can generate controlled force in both the extending and retracting directions, which is critical for safe cargo handling. During retraction, fluid enters the rod-side port and forces each stage to collapse in reverse order, largest stage retracting last.<\/p>\n

The welded construction of our telescopic arm cylinders<\/b> ensures that each stage is securely joined and sealed, with internal guide rings and wear bands preventing metal-to-metal contact between stages. Cushioning valves at the end of each stage stroke absorb kinetic energy and prevent shock loads \u2014 an essential feature when lifting heavy cargo on a rolling deck. The entire system is designed to maintain smooth, proportional movement even under uneven loads, side-loading, or rapid cycling conditions common in offshore crane operations.<\/p>\n

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Compatible Replacement for Major Crane Brands<\/h2>\n

Note: The brand names listed below are the property of their respective owners. We reference them solely to help you identify cross-compatible replacements and simplify your sourcing process. Our products are independently manufactured and are not authorized or endorsed by any of these companies.<\/p>\n

Our telescopic boom hydraulic cylinders<\/b> are engineered as direct-fit or adaptation-ready replacements for deck crane systems originally equipped by:<\/p>\n