{"id":1790,"date":"2026-09-09T06:03:15","date_gmt":"2026-09-09T06:03:15","guid":{"rendered":"https:\/\/ever-powers.com\/?post_type=product&p=1790"},"modified":"2026-09-09T06:10:25","modified_gmt":"2026-09-09T06:10:25","slug":"crawler-crane-boom-anti-tilt-hydraulic-cylinder-hcyy11112019","status":"publish","type":"product","link":"https:\/\/ever-powers.com\/ary\/product\/crawler-crane-boom-anti-tilt-hydraulic-cylinder-hcyy11112019\/","title":{"rendered":"Crawler Crane Boom Anti-Tilt Hydraulic Cylinder \u2014 HCYY11112019"},"content":{"rendered":"
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SEO Keyword Research \u2014 HCYY11112019<\/h2>\n

Primary Keyword:<\/strong> crawler crane boom anti-tilt hydraulic cylinder<\/p>\n

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Long-tail Keywords:<\/strong> OEM replacement crawler crane boom backstop cylinder, buy crawler crane anti-tilt cylinder 190mm bore, custom crane safety cylinder manufacturer, heavy lift crane boom fall prevention hydraulic cylinder, crawler crane boom overrun prevention cylinder supplier<\/p>\n<\/div>\n

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HCYY11112019 \u2014 Crawler Crane Boom Anti-Tilt Hydraulic Cylinder<\/h2>\n

\u0627\u0644 crawler crane boom anti-tilt hydraulic cylinder<\/strong> HCYY11112019 is a tensile safety actuator that prevents the main boom of a crawler crane from over-rotating rearward past its design limit angle. Positioned between the crane’s upper structure and the rear chord of the boom, it acts as a hydraulic backstop \u2014 allowing controlled boom movement within the rated range while providing a definite structural arrest against over-travel. With a 190 mm bore, a 160 mm rod, and a 4,300 mm pin-to-pin installation distance, this is the longest-reaching cylinder in the crane series.<\/p>\n

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crawler crane boom anti-tilt hydraulic cylinder installation diagram<\/p><\/div>\n<\/div>\n

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Product Overview<\/h2>\n

A crawler crane boom can become unstable during heavy lifts when the main hoist line is pulled taut or when a load is released suddenly. If the boom passes its rated vertical angle and continues to rotate rearward \u2014 a condition known as a boom-over or rear-tilt event \u2014 the consequences are severe: uncontrolled structural collapse of the boom, loss of the suspended load, and risk of fatality to personnel in the working area. The anti-tilt cylinder is the mechanical and hydraulic device that prevents this from occurring. Unlike the luffing cylinder, which is a force-output actuator, the boom backstop cylinder is primarily a tensile restraint: it resists the rearward pull force that the boom exerts when its angle exceeds the safe limit.<\/p>\n

\"HCYY11112019<\/p>\n

HCYY11112019 uses a 160 mm rod diameter \u2014 an 84% rod-to-bore ratio, the highest in the crawler crane cylinder series. This unusually thick rod is not required for column buckling resistance, as the backstop cylinder operates predominantly in tension (extension resistance) rather than compression. Instead, the large rod section provides the tensile cross-sectional area needed to resist the boom pull-back force during a limit event. At 31.5 MPa, the 1,608 kN rod yield capacity means the cylinder can absorb the boom’s rearward load without entering the plastic deformation range of the rod material. The rod is manufactured from 42CrMo4 alloy steel with Charpy impact toughness certification, confirming ductile failure behaviour at low temperatures rather than brittle fracture.<\/p>\n

The 4,300 mm pin-to-pin installation distance reflects the large triangular geometry of a crawler crane’s A-frame or gantry structure. The backstop cylinder spans a long diagonal from a high point on the upper structure to the rear boom chord, which means any replacement cylinder must be manufactured precisely to this installation distance. Errors in this dimension alter the boom’s mechanical angle limit: a shorter cylinder tightens the working range unnecessarily; a longer cylinder allows the boom to travel further rearward before arrest and reduces the safety margin. Both outcomes are operationally unacceptable in crane service.<\/p>\n<\/div>\n

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Technical Specifications<\/h2>\n

\"HCYY11112019<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Model<\/strong><\/td>\nHCYY11112019<\/td>\n<\/tr>\n
Specification<\/strong><\/td>\n\u03a6190\u00d7\u03a6160\u00d71400 mm (Bore \u00d7 Rod \u00d7 Stroke)<\/td>\n<\/tr>\n
Bore Diameter<\/strong><\/td>\n190 mm<\/td>\n<\/tr>\n
Rod Diameter<\/strong><\/td>\n160 mm (84% rod-to-bore ratio)<\/td>\n<\/tr>\n
Stroke<\/strong><\/td>\n1,400 mm<\/td>\n<\/tr>\n
Working Pressure<\/strong><\/td>\n31.5 MPa<\/td>\n<\/tr>\n
Maximum Withstand Pressure<\/strong><\/td>\n40 MPa<\/td>\n<\/tr>\n
Installation Distance (Pin\u2013Pin)<\/strong><\/td>\n4,300 mm<\/td>\n<\/tr>\n
Weight<\/strong><\/td>\n820 kg<\/td>\n<\/tr>\n
Rod Yield Tensile Capacity<\/strong><\/td>\n1,608 kN<\/td>\n<\/tr>\n
Rod Material<\/strong><\/td>\n42CrMo4 alloy steel + Charpy toughness certification<\/td>\n<\/tr>\n
Guide Arrangement<\/strong><\/td>\nDual guide rings<\/td>\n<\/tr>\n
Compliance<\/strong><\/td>\nEN 13135 safety-function classification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\"HCYY11112019<\/p>\n

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Crawler Crane Boom Anti-Tilt Hydraulic Cylinder Engineering Features<\/h2>\n

High Rod-to-Bore Ratio \u2014 Tensile Safety Function<\/h3>\n

The 84% rod-to-bore ratio (160 mm rod within a 190 mm bore) is deliberately chosen to maximise the rod’s cross-sectional area. In a backstop cylinder, the primary load is tensile \u2014 the rod is pulled in extension when the boom tries to rotate beyond its limit angle. A larger rod cross-section increases the force required to yield the rod, providing a higher safety margin against rod failure during a boom overrun event. The 1,608 kN rod yield capacity confirms this safety function is quantified, not assumed.<\/p>\n

Bore Diameter \u2014 Controlled Hydraulic Arrest Force<\/h3>\n

Although the primary arrest mechanism for this cylinder is mechanical (rod yield strength), the hydraulic system provides a controlled first stage of deceleration before the boom reaches the mechanical limit. The 190 mm bore at 31.5 MPa generates sufficient hydraulic force to decelerate the boom progressively when the crane operator commands retraction of the backstop cylinder at the upper angle limit. This reduces the dynamic shock load on the boom structure and A-frame at the point of arrest.<\/p>\n

42CrMo4 Rod with Charpy Toughness Certification<\/h3>\n

Charpy impact testing verifies that the 42CrMo4 rod material absorbs sufficient energy before fracture at the minimum service temperature. For a crane boom anti-tilt cylinder, this certification is operationally significant: if a sudden boom overrun event occurs at low ambient temperature, the rod must deform ductilely rather than fracture in a brittle mode. Brittle fracture of the backstop rod would provide no energy absorption and would transfer the full dynamic boom load to the pin joints and structure instantaneously.<\/p>\n

Stroke Length \u2014 Boom Angle Operating Range<\/h3>\n

The 1,400 mm stroke defines the range of boom angular movement that the backstop cylinder accommodates between its fully retracted and fully extended positions. In normal operation, the cylinder travels smoothly through this range as the luffing cylinder adjusts the boom angle. The backstop cylinder’s limit position \u2014 fully extended \u2014 corresponds to the crane’s maximum rated boom angle. The stroke must be matched precisely to the crane geometry; a shorter stroke creates an unnecessary restriction on working angle, while a longer stroke reduces the angular margin before the structural arrest function is engaged.<\/p>\n

Installation Distance \u2014 Structural Geometry Accuracy<\/h3>\n

At 4,300 mm, this is the longest pin-to-pin installation distance in the entire crawler crane cylinder range. This dimension reflects the physical reach from the upper structure mounting point to the rear boom chord pin in the extended gantry geometry. Replacement cylinders must replicate this dimension exactly. Even a \u00b110 mm error changes the angle at which the boom is arrested, which in turn alters the operational load envelope of the crane and may conflict with the crane manufacturer’s rated capacity chart.<\/p>\n

Dual Guide Ring Arrangement<\/h3>\n

The two guide rings in the rod gland are spaced apart to carry the bending moment imposed on the rod when transverse loads act on the boom structure \u2014 wind loading, out-of-level operation, or lateral boom swing. This arrangement distributes the rod’s lateral load reaction over a longer bearing length, reducing contact pressure on the guide ring surfaces and protecting the rod’s chrome-plated surface from localised wear that would accelerate seal degradation.<\/p>\n

Working Pressure and Maximum Withstand Pressure<\/h3>\n

The 31.5 MPa working pressure and 40 MPa maximum withstand pressure match those of HCYY11112018, allowing both cylinders to operate on the same crane hydraulic circuit without requiring separate pressure regulation. The 40 MPa proof rating ensures the backstop cylinder retains its structural integrity even if a pressure spike reaches the hydraulic ports during an emergency arrest event when the crane’s pressure relief system is responding.<\/p>\n<\/div>\n

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Application Areas<\/h2>\n