説明
SEO Keyword Research — HCYY11112018
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HCYY11112018 — Crawler Crane Boom Lifting Hydraulic Cylinder
の crawler crane boom lifting hydraulic cylinder HCYY11112018 is a large-bore, high-pressure luffing actuator designed to raise and lower the main boom of heavy crawler cranes. With a bore diameter of Φ280 mm, a stroke of 2,200 mm, and a working pressure of 31.5 MPa, this cylinder produces an extension force of 1,943 kN — the highest output in the double-acting-cylinders.com crane series. It is used wherever precise boom angle control and sustained heavy lifting capacity are required.
crawler crane boom lifting hydraulic cylinder installation diagram
Product Overview
On a crawler crane, the main boom is the primary structural arm through which all lifting loads are transmitted. The boom lifting — or luffing — cylinder is pinned between the crane’s rotating upper structure and a pivot point on the boom chord or gantry, and it is responsible for changing the boom’s working angle from near-horizontal to near-vertical. As the cylinder extends, the boom rises; as it retracts, the boom lowers. Because the entire suspended load acts through the boom pivot, the luffing cylinder must develop very large hydraulic forces and maintain them steadily for extended periods. Any loss of pressure control translates directly into uncontrolled boom movement and a potential loss-of-load event.
HCYY11112018 uses a Φ280 mm bore diameter to generate its rated 1,943 kN extension force at 31.5 MPa working pressure. The 160 mm rod diameter provides the compressive resistance needed to carry the boom’s weight through the full 2,200 mm stroke without buckling risk. Both ends of the cylinder incorporate adjustable hydraulic cushioning, which absorbs kinetic energy as the boom approaches its upper and lower travel limits and prevents shock loading on the crane structure and hydraulic circuit. The 3,000 mm installation distance from pin centre to pin centre is the critical dimension for fitment compatibility when replacing worn cylinders on existing crane frames.
The cylinder barrel and rod assembly total 1,003 kg. This mass reflects the heavy wall sections required for 31.5 MPa service and the 42CrMo4 alloy steel used for the piston rod — a medium-carbon chromium-molybdenum grade selected for its combination of high tensile strength, toughness, and deep hardenability. The rod surface is hard-chrome plated and precision-ground, giving a finish that extends seal life and resists corrosion in outdoor crane environments. Dual guide rings in the rod-end gland distribute radial loads across a wider bearing area, reducing gland wear when boom side forces create off-axis loading on the rod.
Technical Specifications
| Specification | Value |
|---|---|
| Cylinder Model | HCYY11112018 |
| Specification | Φ280×Φ160×2200 mm (Bore × Rod × Stroke) |
| Bore Diameter | 280 mm |
| Rod Diameter | 160 mm |
| Stroke | 2,200 mm |
| Working Pressure | 31.5 MPa |
| Maximum Withstand Pressure | 40 MPa |
| Installation Distance (Pin–Pin) | 3,000 mm |
| Weight | 1,003 kg |
| Extension Force (at 31.5 MPa) | 1,943 kN |
| Rod Material | 42CrMo4 alloy steel |
| End Cushioning | Adjustable, both ends |
| Compliance | EN 13135 / FEM 1.001 |
Engineering Features
Bore Diameter — Hydraulic Force Output
The 280 mm bore produces a piston area of approximately 615 cm². At 31.5 MPa working pressure, the resulting extension force is 1,943 kN. This force output directly governs the maximum boom load the crane can lift at a given radius. A larger bore diameter increases force capacity without requiring higher system pressure, which is important for the hydraulic pump and valve sizing of large crawler cranes.
Rod Diameter — Buckling Resistance Under Long Stroke
At 2,200 mm stroke, the piston rod acts as a long compression column. The 160 mm rod diameter yields a slenderness ratio that places the rod well within the safe Euler buckling envelope for the applied compressive load. The 42CrMo4 alloy steel rod combines high yield strength with the fracture toughness verified by Charpy impact testing, which is particularly relevant for outdoor cranes that operate in cold weather conditions.
Stroke and Working Range
The 2,200 mm stroke corresponds to the full angular range through which the boom must travel, typically from a low transport angle to the maximum rated working angle. The geometry of each crane model determines exactly how much cylinder extension is needed per degree of boom angle change. Replacement cylinders must match this stroke precisely; shortening or extending the stroke changes boom geometry and can restrict rated lifting capacity.
Installation Distance — Replacement Compatibility
The 3,000 mm pin-to-pin installation distance is the primary fitment dimension. When ordering a replacement crawler crane luffing cylinder, this dimension — along with pin diameter and mounting style — determines whether the cylinder will fit without modification to the crane’s pin bores or mounting brackets. Deviating from this figure requires engineering review of the boom kinematics.
Working Pressure and Maximum Withstand Pressure
The 31.5 MPa working pressure is the continuous operating pressure for which all internal components — barrel wall, end caps, ports, and seals — are designed. The 40 MPa maximum withstand pressure represents the proof load; this is the highest transient pressure the cylinder can experience without permanent deformation or seal damage. The 1.27× pressure ratio between rated and maximum provides a built-in safety margin for pressure spikes generated by load arrest or emergency braking events in the crane hydraulic circuit.
Adjustable End Cushioning
As the piston approaches either end of its travel, an internal cushioning sleeve or plunger redirects flow through a calibrated restriction, decelerating the piston gradually rather than stopping it against the end cap. The cushioning is field-adjustable via a needle valve so technicians can tune the deceleration rate to match the specific load and boom inertia of the crane being serviced.
Sealing System
The piston and rod sealing system is assembled with multi-lip seals capable of sustained 31.5 MPa service. Dual guide rings in the rod gland carry radial loads away from the seal lips, which is critical for a heavy boom cylinder where wind loads and off-lead lifting angles can impose lateral forces on the rod. The external rod surface is protected by hard-chrome plating and a precision ground finish to minimise seal abrasion and resist corrosion.
Application Areas
- Crawler crane main boom luffing: the primary application — controlling boom angle and sustaining load during heavy lifts in infrastructure and industrial construction.
- Heavy gantry elevation systems: large luffing cylinders with similar bore and pressure ratings are used in portal and semi-portal cranes for shipyard and offshore applications.
- Construction projects requiring long-radius lifting: bridge segment installation, LNG storage tank erection, and refinery module setting where crawler crane boom angles must be held precisely under sustained load.
- Infrastructure engineering: power plant construction, dam and hydroelectric projects, and large civil works where crawler cranes are the primary lifting equipment.
- OEM crawler crane manufacturing: new crane builds requiring a certified, drawing-matched luffing cylinder from a hydraulic specialist.
OEM Replacement and Custom Manufacturing
We manufacture replacement crawler crane boom lifting cylinders to match the installation dimensions of cylinders currently fitted to crawler cranes from any origin. The key dimensions required for a replacement order are bore diameter, rod diameter, stroke, installation distance (pin–pin), pin diameter, and mounting configuration at each end. If you can provide a worn cylinder for measurement or a dimensional drawing, we can confirm fitment before production begins.
Custom cylinder design is available for OEM crawler crane manufacturers and crane rebuilders who require dimensions, working pressures, or mounting styles that differ from the HCYY11112018 standard. We can adjust bore diameter, rod diameter, stroke length, end mounting type, port location, and cushioning configuration to match a customer-supplied drawing. Prototype production with dimensional inspection and pressure testing is available before committed to bulk supply.
Bulk supply pricing is available for equipment distributors, crane rental fleet operators, and OEM assembly lines. Please contact us with your required quantity and delivery schedule for a tailored quotation.
よくある質問
Can you manufacture a crawler crane boom lifting cylinder according to a drawing or sample measurement?
Yes. We accept customer drawings in DWG, PDF, or STEP formats and manufacture to the specified dimensions. If a drawing is unavailable, we can work from a worn cylinder or a set of field measurements taken from the installation on the crane frame.
Can this cylinder be used as a direct replacement on existing crawler cranes?
HCYY11112018 is designed with a 3,000 mm pin-to-pin installation distance and the bore, rod, and stroke dimensions listed above. If your existing crane’s luffing cylinder shares these dimensions, it is a direct replacement. We recommend verifying pin diameters and mounting styles before ordering. Modifications are available if any dimension differs.
What is the maximum hydraulic pressure this cylinder can withstand?
The rated working pressure is 31.5 MPa. The maximum withstand (proof) pressure is 40 MPa. Brief transient pressure spikes up to 40 MPa will not cause permanent deformation. Sustained operation above 31.5 MPa is not recommended and will reduce seal life.
Can the bore diameter, rod diameter, or stroke be customised?
Yes. All major dimensions are customisable subject to engineering review. If your crane’s luffing cylinder requires a different bore or stroke, please provide the required dimensions when requesting a quotation. Minimum order quantities may apply for non-standard configurations.
Why is 42CrMo4 alloy steel used for the piston rod?
42CrMo4 offers a combination of high tensile strength, good hardenability through large cross-sections, and fracture toughness at low temperatures. For a 160 mm diameter rod subjected to compressive loads of up to 1,943 kN and potential cold-weather operation, this grade provides the safety margin that lower-alloy steels cannot match consistently across the full section.
What does end cushioning do, and is it field-adjustable?
End cushioning decelerates the piston as it approaches the end of its stroke, preventing high-impact loads on the cylinder end caps and the crane structure. On HCYY11112018, cushioning is fitted at both ends and is adjustable via needle valves so crane technicians can tune deceleration to the crane’s specific load conditions.
What is the lead time for a replacement crawler crane luffing cylinder?
Lead time depends on current production scheduling and order quantity. Please contact us with your specifications and required delivery date for a confirmed lead time quotation. We recommend ordering replacement cylinders before the installed unit reaches end-of-life to avoid crane downtime.
Do you supply to crane distributors and equipment rental companies as well as end users?
Yes. We supply crawler crane hydraulic cylinders to OEM manufacturers, authorised distributors, equipment rental fleets, and crane maintenance contractors. Bulk pricing and long-term supply agreements are available. Please contact us to discuss your procurement structure.
Request a Quotation for HCYY11112018
Submit your cylinder specifications, installation distance, or technical drawing for a crawler crane boom lifting cylinder quotation. We respond to all technical enquiries with engineering confirmation before pricing.
