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Telescopic Cylinders

Single and double-acting telescopic hydraulic cylinder. 2-7 stages, max 12,600 mm stroke. For tipping semi-trailers, tractors, mining bodies, mobile platforms and waste compactor vehicles.

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Real production model

An actual cylinder from SOLIDWORKS production data. Drag to rotate and inspect.

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Technical specs

Spec

Type: Single-acting · Double-acting
Number of stages: 2-7
Stroke (max): 12.600 mm
Push force: Per application, calculated from bore + pressure
Rated pressure: 200-250 bar
Test pressure: 1.5 × rated
End cushioning: Internal cushion · external stop ring

Custom production

These values are typical production ranges. Any combination of bore, stroke, pressure and mounting type is custom-built to the customer's drawing or load profile. The seal brand is entirely the customer's choice; the requested brand is sourced and fitted.

Application

Typical use

Tipping semi-trailer

Lifting a heavy body to a high angle (single-acting).

Tractor & trailer

Tractor-trailer tipping system, semi-trailer applications.

Mining body

Open-pit truck body, heavy aggregate hauling.

Double-acting telescopic

Crane boom extension, waste compactor, controlled retract.

Material

Construction

Stage tubes: DIN 2391-2 St52 / EN 10305-1 E355, H8/H9 tolerance, HPS in-house hard-chrome plating (~30 µm), salt-spray (NSS) tested
Inner rod: CK45 · 42CrMo4 hard-chrome plated bar (certified supply), salt-spray (NSS) tested
Head & cap: St52 forged, weld grade
Seal set: NBR · HNBR · PU · Viton (FKM) (customer choice)

Standard

Reference standards

DIN 2391-2 / EN 10305-1 tube standard
Customer drawing / ISO 6022 reference (telescopic geometry per drawing)
ISO 10100 acceptance test (1.5× rated)
EN 10204 3.1 mill test certificate

Standard titles are dimensional references; certificates are supplied per product on request.

Telescopic cylinder types

Single vs double-acting telescopic

Single-Acting Telescopic

Single port (base). Stages extend in sequence under hydraulic pressure; return by gravity or load. Simple build, fewer seals, fewer internal passages.

Dump truck, waste compactor, semi-trailer tipping

Double-Acting Telescopic

Each stage has a retraction piston face + base/rod-end porting. Extends and retracts under hydraulic pressure. More complex build: for applications where extend/retract control is critical. Significantly higher cost than single-acting telescopic due to added seals, retract piston faces and porting.

Crane boom, mobile platform outrigger, mining body

Hybrid (single/double-acting combination) variant on request, where retract force is needed over part of the stroke. Stage stop: impact managed by internal cushion + external stop ring.

HPS in-house line

Stage Tube Chrome Plating Line

HPS chrome line · telescopic stage tubes

Every stage tube of the telescopic cylinder is processed on HPS's own hard-chrome plating line (~30 µm typical thickness). Our in-house line means no subcontract lead time and quality control stays with us.

Plating

Hard chrome ~30 µm

Tube standard

DIN 2391-2 St52

Process

In-house, no subcontract