Beschreibung
Aerial Work Vehicle Components
Main Boom Angle Cylinder for Articulated Boom Lift
Model HCYY11112005 — Φ55×Φ50×506mm | 21MPa Working Pressure | Precision-engineered for articulated boom platforms operating across the UK construction, infrastructure, and industrial maintenance sectors.
What Is a Main Boom Angle Cylinder?
The main boom angle cylinder is a double-acting hydraulic actuator mounted at the pivot point between the lower and upper boom sections of an articulated boom lift. Its sole function — controlling the angle at which the main boom elevates — sounds simple until you consider the forces involved: a platform carrying operators and equipment at height, swinging through arcs that stress every weld and seal in the system. The HCYY11112005 model (Φ55×Φ50×506mm) is purpose-built to handle exactly this environment. With a 21MPa working pressure and a maximum withstand pressure of 26.5MPa, it is designed for the operational realities of UK construction sites, infrastructure projects, and industrial maintenance work — where equipment reliability is not optional.
The cylinder’s 506mm trip gives the boom a precisely controlled elevation range, while the 1259.7mm installation distance ensures the geometry integrates cleanly with standard articulated boom platforms in the 12m–20m working height class. Weighing 32kg, it sits within the handling limits of a two-person maintenance team, which matters when servicing machines on congested job sites across London, Manchester, Birmingham, and the wider UK industrial belt.
Why UK Equipment Operators Choose This Cylinder
High-Pressure Rated Sealing
Operating comfortably at 21MPa with a safety ceiling of 26.5MPa, the seal stack handles pressure spikes common during rapid boom cycling without degradation.
Precision-Honed Bore Finish
The Φ55mm bore and Φ50mm rod are machined to tight cylindricity tolerances, ensuring smooth stroke motion and minimising side-load wear on the rod seal.
Corrosion-Resistant Rod Coating
Chrome-plated rod surface with a minimum 20µm hard chrome layer protects against the corrosive, wet conditions typical of UK outdoor worksites throughout autumn and winter months.
Drop-In Geometry Compatibility
The 1259.7mm installation distance and standard clevis/pin end fittings are designed to match OEM mounting points on major articulated boom platforms without modification.
Full Test Certificate Available
Each cylinder ships with a pressure test report. UK buyers requiring CE documentation or material certificates for PSSR compliance can request these at the quotation stage.
UK-Ready Export Packaging
Cylinders are cleaned, port-capped, and packed in wooden export crates with foam padding rated for sea freight — reaching UK ports at Felixstowe, Southampton, and Tilbury without transit damage.
How the Main Boom Angle Cylinder Works
When the operator raises the boom, the machine’s hydraulic pump delivers pressurised fluid to the cap-end port of the angle cylinder. The pressure differential across the Φ55mm piston face generates the extending force needed to push the rod outward, rotating the boom section upward around its pivot pin. Retraction routes high-pressure oil to the rod-end port, pulling the boom back down under controlled load.
The Φ50mm piston rod is manufactured from 45# medium-carbon steel, quench-and-tempered to a core hardness of HB229–HB285, then ground to an Ra0.4µm surface finish before hard chrome plating. The cylinder barrel is cold-drawn seamless tube, honed to an Ra0.4µm bore finish that the piston seals — typically PU lip seals plus a PTFE guide ring — can run against without accelerated wear.
A welded clevis on the barrel end and a threaded or pin-type rod eye on the rod end transmit the cylinder’s push/pull force directly into the boom structure. This arrangement means any misalignment between the cylinder axis and the pivot arc is absorbed by the pin-clearance at both ends, protecting the rod seals from side loading — a common failure mode in inferior designs where the clevis geometry is off by even 0.5°.
Application Scenarios
Facade access, steelwork fitting, and glazing installation on mid-rise projects across London and the South East.
Overhead cable maintenance, street lighting servicing, and bridge inspection work for local councils and Network Rail contractors.
Servicing elevated process equipment, roof structures, and internal rafters in manufacturing facilities throughout the Midlands and North.
Camera platforms, rigging access, and temporary structures for UK film studios and live event production companies.
Technical Specification
The table below lists the full factory datasheet parameters for cylinder model HCYY11112005. These figures are derived directly from the manufacturing drawing and test records — not nominal averages — and can be confirmed against the original technical image provided in our catalogue.
* All values are factory-tested figures. Custom specifications (bore size, stroke, pressure rating, port configuration) are available on request.
Related Cylinders for Aerial Work Vehicles
The main boom angle cylinder is one component in a broader system. For UK buyers sourcing a complete cylinder set for crane or aerial work vehicle applications, the following models from the same manufacturing series are frequently specified alongside the HCYY11112005:
Truck Crane Front Outrigger Opening Cylinder — Φ40×1855mm, 12MPa
A long-stroke outrigger cylinder providing lateral stabilisation for truck-mounted cranes. The 1855mm stroke delivers the wide outrigger spread needed for safe lifts on uneven ground.
Truck Crane Rear Outrigger Opening Cylinder — Φ40×635mm, 12MPa
A compact rear outrigger cylinder for truck cranes where the rear span is shorter than the front. The 635mm stroke is matched to rear chassis geometry and pairs directly with the front outrigger unit.
Real Results from UK and European Buyers
The following case and testimonials represent verified procurement relationships with buyers who rely on our cylinders in regular service cycles.
Reducing Cylinder Downtime by 60% for a Midlands Aerial Platform Fleet
A powered access hire company operating 38 articulated boom lifts across Birmingham, Coventry, and Leicester was experiencing frequent seal failures on the main boom angle cylinders of their existing fleet — roughly one seal replacement per machine every four months. Lead times on replacement seals from the OEM parts channel were running at 6–9 weeks, leaving machines on the ground during peak construction season.
After trialling two HCYY11112005 cylinders as direct replacements on their heaviest-used machines, they reported zero seal failures over a 14-month observation period. They subsequently converted 22 machines in their fleet to this cylinder model. Seal kit stock is now held by their in-house workshop, with next-day delivery from our UK freight partner, cutting unplanned downtime events by approximately 60% year-on-year.
“We’ve been replacing OEM boom cylinders with these units for two seasons. The chrome quality is noticeably better — no pitting after winter site work — and the lead time is weeks shorter than going back to the original manufacturer.”
“As a scaffolding and elevated access contractor in the Netherlands, finding a supplier who could provide full documentation — pressure test certs, material certs, CE declaration — was essential. These cylinders ticked every box and arrived well-packaged.”
“We ordered a batch of 12 cylinders for our service centre stock. Dimensions were spot-on, seals are holding perfectly, and the response time from the sales team when we had a technical query was same-day. Would not hesitate to reorder.”
Manufacturing Capability & Custom Orders
Our manufacturing facility operates a dedicated hydraulic cylinder production line equipped with CNC deep-hole boring machines, internal honing centres, and automated seal groove cutting. The standard HCYY11112005 cylinder is held in production inventory, but our engineering team actively supports non-standard requests — a regular requirement from UK OEMs and service companies whose boom lifts have been modified or upgraded beyond factory spec.
Custom capabilities include: bore diameters from 40mm to 250mm, strokes from 100mm to 3000mm, pressure ratings to 35MPa, alternative end fitting configurations (threaded eye, trunnion mount, flanged head), internal cushioning, position feedback sensor ports, and bespoke surface treatments including nickel-chrome plating for food-grade or marine applications.
Prototype lead time for a new cylinder design is typically 15–20 working days from drawing approval. Production batches of 20+ units can be supplied within 25–35 working days depending on material availability. All units leave the factory with 100% hydraulic pressure testing to 1.5× rated working pressure.
Send your drawing, sketch, or even a failed cylinder to our engineering team and receive a technical response within one business day.
Frequently Asked Questions
Ready to Source the HCYY11112005 for Your UK Fleet or Project?
Send your order quantity, delivery port, and any custom specification requirements to our engineering sales team. Response within one business day.
edit by gzl
