Aerial Work Platform Lift Hydraulic Cylinder — HCYY11112006 | Long-Stroke Φ65×Φ45×1260, 18 MPa

HCYY11112006 — Aerial Work Platform Lift Hydraulic Cylinder (Long-Stroke Lifting Cylinder)

The HCYY11112006 aerial work platform lift hydraulic cylinder is the long-stroke variant in our AWP lifting cylinder range, sharing the proven Φ65 × Φ45 bore-and-rod geometry of the HCYY11112003 but scaled to a 1260 mm stroke for platforms requiring greater vertical reach. At 18 MPa working pressure and a 1629 mm installation distance, this cylinder is the primary lifting actuator for boom-type aerial work platforms in the 16–22 meter working height segment — where stroke length is the critical parameter that directly sets the machine’s rated working height.

The 54 kg weight reflects the additional tube length and the structural wall thickness needed to handle the increased buckling load on a 1260 mm stroke. At this stroke length, column stability under combined axial and lateral loading becomes the governing design constraint — not just burst pressure — which is why the Ø45 mm rod diameter is maintained from the shorter-stroke version: the rod section modulus must resist deflection across the full extended length.

Technical Specifications: Long-Stroke AWP Lift Cylinder, 1260 mm Stroke at 18 MPa

Long-Stroke Cylinder Engineering: Buckling, Seal Wear, and Precision Alignment for 1260 mm AWP Cylinders

A 1260 mm stroke cylinder is mechanically more demanding than a short-stroke lifting cylinder for reasons that go beyond simply needing more tube. As stroke length increases, two engineering challenges intensify: column buckling under compressive load, and seal wear from the increased rod travel distance per cycle.

Buckling resistance is governed by Euler’s formula, which shows that buckling load drops with the square of the free length. The HCYY11112006’s Ø45 mm rod at 1260 mm stroke requires careful analysis of the end-condition factor (based on how the cylinder is pin-mounted) to verify that the rod stays within the safe elastic range under the maximum axial compressive load. The Ø45 mm rod section modulus is the minimum consistent with the required safety factor for this stroke length at 18 MPa working pressure.

Seal wear is proportional to rod travel per cycle. A cylinder cycling 1260 mm per stroke will wear its rod seals faster than an 840 mm stroke cylinder at the same cycle rate. The HCYY11112006 uses a two-stage rod wiper and U-cup rod seal arrangement engineered for extended service life on long-stroke cycles — reducing maintenance intervals for fleet operators.

HCYY11112006 vs HCYY11112003: Selecting the Right Stroke Length for Your Platform

The HCYY11112003 (840 mm stroke, 1075 mm installation distance) and the HCYY11112006 (1260 mm stroke, 1629 mm installation distance) share identical bore and rod dimensions at the same 18 MPa working pressure. The selection between them depends entirely on the required working height and the boom geometry:

• HCYY11112003 (840 mm stroke) — suited to platforms in the 10–16 m working height range where boom geometry and linkage proportions accommodate the shorter cylinder.
• HCYY11112006 (1260 mm stroke) — suited to platforms in the 16–22 m working height range where a longer stroke is needed to achieve the required boom elevation arc at the same hydraulic pressure.

Substituting one for the other without adjusting the boom geometry will change the maximum working height and may violate the platform’s type-tested configuration. Always match the replacement cylinder to the original installation distance — not just the bore and rod size.

Applications: Long-Stroke AWP Lifting Cylinders for Medium-to-Large Boom Platforms

• Medium-large self-propelled boom lifts (16–22 m working height) — primary lifting cylinder for the main boom elevation mechanism.
• Truck-mounted aerial platforms — replacement lifting cylinder for truck-mount boom lifts where the mounting geometry requires the 1629 mm installation distance.
• Articulating platforms with extended lower boom — lower knuckle section lifting cylinder where the longer stroke extends the lower boom’s working arc.
• Industrial maintenance platforms — equipment used in petrochemical, power generation, and bridge maintenance where greater working height is required.
• OEM new platform design — engineering teams specifying a production-ready long-stroke lifting cylinder at 18 MPa for platforms in the 54 kg weight class.

Manufacturing Precision and Long-Stroke Cylinder Testing

Long-stroke cylinders require tighter tube straightness tolerances than short-stroke units. The HCYY11112006 barrel is verified for straightness to prevent the piston from side-loading the bore wall during travel — a key cause of accelerated wear in long-stroke applications. The bore is honed to ensure consistent oil film thickness along the full 1260 mm travel length.

All cylinders are tested to 27 MPa (maximum withstand) before shipment. Function testing covers full stroke in both directions, with inspection of rod surface condition, port thread integrity, and end-cap sealing at working pressure.