{"id":793,"date":"2026-05-13T03:12:59","date_gmt":"2026-05-13T03:12:59","guid":{"rendered":"https:\/\/tiltcylinder.net\/?post_type=product&p=793"},"modified":"2026-05-13T03:12:59","modified_gmt":"2026-05-13T03:12:59","slug":"epyy11112021-truck-crane-main-boom-angle-cylinder","status":"publish","type":"product","link":"https:\/\/tiltcylinder.net\/es\/product\/epyy11112021-truck-crane-main-boom-angle-cylinder\/","title":{"rendered":"EPYY11112021 Truck Crane Main Boom Angle Cylinder"},"content":{"rendered":"
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Industrial-Grade Luffing Ram for Heavy-Duty Mobile Cranes<\/span><\/h1>\n

Experience unparalleled lifting stability with the EPYY11112021 Main Boom Angle Cylinder<\/strong>. Engineered as the hydraulic heart of high-tonnage truck cranes, this 1155kg powerhouse delivers a 31.5MPa working pressure and an expansive 3507mm stroke. Designed for precision boom elevation and angle maintenance, it guarantees unwavering safety for the world’s most complex lifting operations.<\/p>\n<\/header>\n

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1. Comprehensive Product Overview<\/h2>\n
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The EPYY11112021 Main Boom Angle Cylinder<\/strong> (also known as a crane luffing cylinder<\/strong>) is the primary structural actuator responsible for raising and lowering the main telescopic or lattice boom. Tasked with supporting hundreds of tons of cantilevered weight, this truck crane hydraulic ram<\/strong> must provide absolute rigid control during the most critical phases of a lift.<\/p>\n

Forged from premium ST52.3 steel, this model serves as a high-performance aftermarket replacement for leading mobile crane brands such as Liebherr, Terex, Tadano, and Sany<\/strong>. It is specifically optimized for high-cycle luffing where precision angle maintenance and resistance to structural sway are paramount for job site certification.<\/p>\n

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Primary Field Applications:<\/h4>\n
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  • Truck-Mounted Cranes:<\/strong> Main boom hoist and luffing angle control.<\/li>\n
  • All-Terrain Cranes:<\/strong> High-pressure elevation for multi-stage booms.<\/li>\n
  • Rough Terrain Cranes:<\/strong> Ruggedized lifting for off-road construction.<\/li>\n
  • Specialized Marine Cranes:<\/strong> Deck crane boom adjustment in high-torque environments.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
    \"Massive<\/div>\n<\/div>\n<\/section>\n
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    2. Exact Technical Parameters<\/h2>\n

    Lifting thousands of foot-pounds requires technical perfection. Review the verified specifications of the EPYY11112021 below to ensure precise system integration for your mobile fleet.<\/p>\n

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    Technical Attribute<\/th>\nSpecification Details (Model: EPYY11112021)<\/th>\n<\/tr>\n<\/thead>\n
    Cylinder Model Number<\/td>\nEPYY11112021<\/td>\n<\/tr>\n
    Bore \u00d7 Rod \u00d7 Stroke Specifications<\/td>\n\u03a6280 \u00d7 \u03a6250 \u00d7 3507 (mm)<\/td>\n<\/tr>\n
    Rated Working Pressure<\/td>\n31.5 MPa (High-Tonnage Lifting Force)<\/td>\n<\/tr>\n
    Maximum Withstand Pressure<\/td>\n39 MPa (Extreme Shock Redundancy)<\/td>\n<\/tr>\n
    Trip \/ Operational Stroke<\/td>\n3507 mm<\/td>\n<\/tr>\n
    Installation Distance (Pin-to-Pin)<\/td>\n4218 mm<\/td>\n<\/tr>\n
    Total Unit Weight<\/td>\n1155 kg (Ultra-Robust Steel Mass)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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    3. Structural Principles & CAD Blueprint<\/h2>\n
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    The EPYY11112021 functions as a massive double-acting hydraulic hoist. In mobile crane applications, it is the fundamental pivot point for the boom assembly. By converting 31.5MPa of system pressure into linear extension, it provides the torque necessary to lift the boom from its retracted travel position to its maximum vertical angle.<\/p>\n

    Hydraulic Performance:<\/strong> Utilizing a colossal \u03a6280mm internal bore, the cylinder generates enormous breakaway force. The thick \u03a6250mm rod is specifically engineered for “anti-buckling” strength, ensuring the boom stays rigid even at horizontal angles where gravitational leverage is at its peak.<\/p>\n

    Blueprint Anatomy:<\/strong> As detailed in the CAD schematic, the cylinder features a 4218mm installation profile. A key design feature is the integrated manifold porting<\/strong> for high-flow counterbalance valves, preventing uncontrolled boom drops in the event of hose failure. The rod end and barrel base are equipped with oversized spherical plain bearings to absorb the structural flex inherent in 100-ton lifting tasks.<\/p>\n<\/div>\n

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    \"Structural<\/p>\n

    CAD Schematic showcasing the \u03a6280mm bore architecture and heavy-duty manifold integration.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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    4. Core Advantages of EPYY Luffing Rams<\/h2>\n
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    \ud83d\udc18<\/div>\n

    1155kg Stabilizing Mass<\/h3>\n

    The massive 1155kg build provides the material density required to sustain 31.5MPa pressures over a massive 3.5m stroke without structural fatigue.<\/p>\n<\/div>\n

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    \ud83d\udee1\ufe0f<\/div>\n

    39MPa Surge Immunity<\/h3>\n

    Cranes face violent wind-load spikes and sudden load shifts. Our 39MPa withstand rating ensures the steel barrel remains immune to swelling.<\/p>\n<\/div>\n

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    \ud83d\udca7<\/div>\n

    Zero-Drift NOK Sealing<\/h3>\n

    Utilizing imported Japanese NOK seals to eliminate internal bypass. This ensures the main boom maintains a constant angle for hours without creeping.<\/p>\n<\/div>\n

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    \u2699\ufe0f<\/div>\n

    Anti-Buckling \u03a6250mm Rod<\/h3>\n

    The massive rod diameter is induction-hardened to provide unparalleled columnar strength, critical when the boom is fully extended under maximum weight.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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    5. Elite Structure and Material Craftsmanship<\/h2>\n
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    As a dedicated Heavy-Duty Crane Cylinder Manufacturer<\/strong>, we recognize that boom actuator failure is not an option. We utilize uncompromised metallurgy to ensure the EPYY11112021 outlasts the chassis it serves.<\/p>\n

    The 1155kg assembly is milled from ST52.3 (E355) high-yield strength seamless steel<\/strong>. The internal bore is CNC skived and roller-burnished to a mirror Ra 0.2\u00b5m finish, dramatically extending seal life even in dusty construction environments.<\/p>\n