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Aerial Work Platform Hydraulics · UK Industrial Supply
Aerial Platform Main Boom Angle Cylinder — 555mm Stroke
Purpose-engineered for boom-type aerial work platforms, this main boom angle cylinder delivers the controlled angular displacement that keeps elevated workers safe and productive. With a 555mm stroke, Φ70×Φ40 bore-rod geometry, and a 20MPa working pressure rating, it handles the load cycles and environmental demands typical of UK construction, utilities, and facilities maintenance operations.
Ready to source this cylinder for your aerial platform fleet in the UK?
What the Main Boom Angle Cylinder Does
The main boom angle cylinder is the hydraulic actuator responsible for raising and lowering the primary boom arm of an aerial work platform. Every time an operator elevates the platform from ground level to working height — whether that is 12 metres above a UK motorway bridge deck or 20 metres alongside a wind turbine nacelle — it is this cylinder that translates hydraulic pressure into controlled angular movement. The geometry here is Φ70×Φ40×555: a 70mm bore delivering push force, a 40mm rod providing pull capacity, and a 555mm stroke covering the angular arc the boom requires. At 20MPa working pressure with a 30MPa burst-rated maximum, the design carries a safety margin that satisfies the demands of EN 280 and LOLER-governed work environments common across Great Britain.
The installation distance of 923mm positions the cylinder within the structural geometry of the boom pivot, ensuring that moment arm calculations remain within the machine designer’s load envelope at all boom angles. The 28kg weight reflects a careful balance between structural wall thickness and the need to keep gross vehicle weight within transport limits — a real concern for UK van-mounted or trailer-mounted platforms operating under DVSA regulations.
Technical Specifications
Materials, Engineering Principles & Application Scenarios
Cylinder Barrel
Precision honed cold-drawn seamless steel tube (ST52 equivalent), achieving an inner surface roughness of Ra 0.4 µm or better. The tight bore tolerance ensures that seal friction remains predictable across the operating temperature range of -20°C to +80°C — important for UK winter site conditions.
Piston Rod
45# carbon steel, induction hardened to HRC 50–58, then hard-chrome plated to a minimum 25µm deposit and polished. This combination resists scoring from particulate contamination common on UK construction sites and prevents corrosion from rain exposure during outdoor storage between hire periods.
Seal Package
Imported polyurethane (PU) and PTFE composite seals with a dedicated dust wiper ring at the rod gland. The seal geometry is matched to the dynamic pressure loading of boom angle operations, where the cylinder sees repeated partial-stroke cycling rather than full-stroke reciprocation, reducing the risk of localised seal extrusion.
End Connections
Clevis and pin-eye configurations machined from forged steel. Spherical plain bearings at pivot points accommodate the minor misalignment that occurs as the boom geometry changes through its angular travel, preventing edge loading on the rod and extending the service interval between maintenance inspections.
Where This Cylinder Works
In the UK hire and contracting market, boom-type aerial work platforms fitted with this cylinder category appear across a wide spread of sectors. Utility companies maintaining overhead line infrastructure across the National Grid network rely on articulated and telescopic booms for live-adjacent work where platform stability at height is safety-critical. Facilities management contractors servicing commercial property portfolios in London, Manchester, Birmingham, and Edinburgh use these machines for façade cleaning, glazing replacement, and HVAC servicing on multi-storey buildings. The offshore wind sector — rapidly expanding along the North Sea coast — requires compact boom platforms on vessel decks where weight and dimensional envelope matter, precisely where the 28kg mass and 923mm installation distance of this cylinder become engineering constraints worth noting at the specification stage.
Why Specifiers Choose This Cylinder
30 MPa Burst Rating
A 50% safety margin over the 20 MPa working pressure, giving OEMs and end-users confidence during dynamic shock loads such as rapid boom lowering into a travel lock under a heavy payload.
Hard-Chrome Rod Protection
The 25µm minimum chrome layer resists abrasion from grit and salt aerosol — a real service life factor on coastal and urban UK sites where machines are exposed to road de-icing chemicals throughout winter months.
Drop-In Replacement Geometry
The 923mm installation distance and standard pin-eye interfaces are engineered to serve as direct replacements on boom platforms originally built with OEM cylinders, reducing downtime during a cylinder change-out on hire fleet machines.
Controlled Leakage Rate
The PU/PTFE composite seal system is tested to a zero-external-leakage standard. For LOLER-inspected machines in the UK, this matters: any visible hydraulic leak at the rod gland triggers an immediate out-of-service notice and an unplanned repair cost.
Full Traceability
Each cylinder carries a model identification mark and is shipped with test pressure records. Procurement teams and fleet managers in the UK who maintain audit trails for LOLER documentation can cross-reference the test record against the cylinder serial at any future inspection.
Aerial Work Platform Cylinder Series
The main boom angle cylinder is one of several hydraulic actuators that make up a complete aerial platform cylinder set. Alongside it, the steering system and levelling functions each require their own purpose-designed cylinders. Two related products in this series are available now:
Dual-Action Aerial Vehicle Steering Cylinder (100×2 Stroke)
Precision steering actuator for aerial work vehicle chassis — dual-action design for responsive directional control at ground level.
Aerial Work Platform Upper Leveling Cylinder (60mm Stroke)
Compact levelling cylinder that holds the platform basket horizontal as the boom articulates — critical for operator safety at elevated working positions.
Customer Success: UK Aerial Platform Hire Company
Project Background — North West England Utilities Fleet Refurbishment
A plant hire business operating a fleet of 47 boom-type aerial work platforms across the North West of England contacted us in early 2025. Eight machines — primarily articulated booms in the 20m working height class — had been grounded by their LOLER inspector following identification of external hydraulic leaks at the main boom angle cylinder rod gland on three units, and suspected internal bypass on the remaining five. The OEM replacement lead time was quoted at 14 weeks.
We supplied eight units of the HCYY11112010 cylinder with matching seal kits and a dimensional verification report confirming fitment against the customer’s boom pivot geometry. Delivery to their depot in Warrington was completed within 12 working days. Their in-house maintenance team fitted all eight cylinders over a single two-day workshop session, and all machines passed LOLER re-examination without further comment.
The customer reported that hire revenue recovered from those eight machines in the following six weeks offset the cylinder cost by a factor of roughly six to one — a straightforward case where cylinder procurement speed had a direct, measurable impact on business profitability.
“
We had three booms grounded and a customer waiting on a long-term contract. The cylinders arrived in under two weeks, fitted perfectly, and our inspector signed them off without a query. That is exactly what you need from a supplier when hire revenue is on the line.
Fleet Manager — Aerial Work Platform Hire, Warrington, UK
“
We sourced a batch of boom angle cylinders for a refurbishment project on articulated platforms used in wind farm construction support. The dimensional accuracy was spot on, and the pressure test certificates were exactly what our HSE documentation process required. Will be ordering again for the next phase.
Procurement Engineer — Renewable Energy Contractor, Aberdeen, Scotland
“
We are a small hydraulic repair workshop in the Midlands and we keep a standing order for boom angle cylinders from this range. Our trade customers — mainly plant hire depots — need cylinders in stock, not on order. The lead times and quality consistency from Boom Cylinders have made them our first call for this product category.
Director — Hydraulic Repair & Supply, Birmingham, UK
Manufacturing Capability & Custom Orders
Our manufacturing facility operates CNC deep-hole drilling lines, precision honing equipment, and automated welding stations dedicated to hydraulic cylinder production. The quality management system is ISO 9001 certified, and every cylinder passes hydrostatic pressure testing at 1.5× maximum working pressure before despatch. For UK customers who require cylinder-specific documentation to support LOLER inspection records, we produce test certificates and material traceability reports as standard.
Beyond catalogue products, we carry strong customisation capability. OEMs and hire fleet operators who are developing next-generation aerial platform designs — or who are maintaining older machines where original cylinder specifications have been discontinued — can bring us a drawing, a worn-out example, or a dimensional survey, and we will engineer a cylinder to those requirements. Custom bore sizes, non-standard rod diameters, alternative port configurations, different end-mount styles, and specific coating or paint requirements are all handled within our normal engineering workflow. Minimum order quantities for custom builds are negotiable depending on the level of tooling involved. If your aerial platform application requires something we do not list, contact our technical team with your specification and we will provide a written assessment within five working days.
Frequently Asked Questions
Ready to Order or Need a Technical Assessment?
Send your requirements to our team and receive a written quotation within one business day.
edit by gzl
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