EAST AI Hydraulic Manufacturer​

Since 2006

EAST AI Hydraulic  Manufacturer

Since 2006

Three-stage Telescopic Cylinder

Three-stage Telescopic Cylinder

The Three-Stage Telescopic Cylinder is a high-performance hydraulic cylinder specifically engineered for applications requiring long stroke within a compact installation space. Its telescopic design features three nested stages that extend sequentially, providing significantly longer extension than a conventional single-stage cylinder. Manufactured from seamless honed tubes and induction-hardened chrome-plated rods, the cylinder delivers exceptional strength, wear resistance, and durability. With double-acting or single-acting configurations available, the Three-Stage Telescopic Cylinder ensures smooth operation, high load capacity, and reliable performance in industries such as construction, mining, material handling, and transportation.
  • Model: Telescopic Type
  • Brand: EAST AI
Product Description

Advantages of Three-Stage Telescopic Cylinder

Choosing a Three-Stage Telescopic Cylinder brings several operational and economic benefits:

Compact retracted length

Ideal for equipment with limited space.

Extended stroke capability

Up to 3–4 times longer stroke compared to single-stage cylinders.

High load handling

Designed for heavy lifting and high-pressure environments.

Durability 

Chrome-plated rods and precision seals extend service life.

Versatility

Available in both single-acting and double-acting configurations.

Leak-free design

Advanced sealing systems reduce leakage risks.

Customization 

Tailored bore sizes, stroke lengths, and mounting styles to fit specific equipment.

Production Process of Three-Stage Telescopic Cylinder

The Three-Stage Telescopic Cylinder is manufactured through a precise and controlled process:

  1. Raw Material Selection 

    Premium ST52, CK45, or alloy steels are used.

  2. Tube Processing 

    Seamless tubes undergo cold drawing and honing for smooth internal finish.

  3. Rod Processing 

    Chrome-plated rods are induction-hardened for corrosion and wear resistance.

  4. Stage Assembly 

    Multiple telescopic stages are machined with precision to ensure smooth extension.

  5. Seal Installation

    High-performance seals from brands such as Parker, Hallite, or NOK.

  6. Welding and Machining 

    End caps and mounting features are welded and machined to specifications.

  7. Pressure Testing 

    Cylinders undergo hydrostatic pressure tests to ensure strength and leak-free operation.

  8. Surface Treatment

    Powder coating, phosphating, or painting for enhanced durability.

  9. Final Inspection

    Dimensional checks, hardness tests, and surface roughness validation.

Applications of Three-Stage Telescopic Cylinder

The Three-Stage Telescopic Cylinder is widely applied in industries requiring compact yet long-stroke hydraulic power:

Construction Machinery 

Dump trucks, tippers, and loaders.

Mining Equipment

Underground transport, drilling rigs, and rock breakers.

Agricultural Machinery

Trailers, harvesters, and sprayers.

Material Handling

Cranes, forklifts, and lifting platforms.

Transport & Logistics

Garbage trucks, cargo lifts, and telescopic booms.

Industrial Systems

Press machines, automated systems, and marine equipment.

Product Details of Three-Stage Telescopic Cylinder

Specification Details
Product Name Three-Stage Telescopic Cylinder
Bore Size Range 50 mm – 400 mm
Stroke Length Up to 7000 mm
Number of Stages Three (customizable design available)
Working Pressure Up to 300 bar
Material ST52 / CK45 / 42CrMo4
Rod Surface Hard Chrome Plated, Induction Hardened
Seal Brand Parker / Hallite / NOK (optional)
Temperature Range -30°C to +120°C
Mounting Options Trunnion, Clevis, Flange, Eye, Lug Mounting
Standard ISO 6022 / DIN or Custom

Factory Inventory of Three-Stage Telescopic Cylinder

We maintain a large inventory of Three-Stage Telescopic Cylinder components and semi-finished products to ensure quick assembly and shipment:

Ready stock of honed tubes and chrome rods in standard sizes.

Semi-finished telescopic cylinder stages for fast customization.

Finished cylinders in popular models for immediate delivery.

Monthly production capacity of over 8,000 hydraulic cylinders.

Special packaging to protect cylinders during storage and transit.

This ensures distributors, stockists, and engineers receive fast deliveries and reliable supply.

Quality Inspection of Three-Stage Telescopic Cylinder

Each Three-Stage Telescopic Cylinder undergoes strict inspection to ensure compliance with international standards:

Dimensional Tolerance Check

Bore, rod, and stroke dimensions validated.

Surface Roughness Test

Honed tubes tested for seal compatibility.

Hardness Test

Rods tested after heat treatment to confirm wear resistance.

Welding Inspection

Ultrasonic and X-ray examination for welding strength.

Hydraulic Pressure Test

Each cylinder is tested at rated pressure to ensure no leakage.

Salt Spray Test

Chrome-plated rod tested for corrosion resistance.

Certificates of Three-Stage Telescopic Cylinder

Our Three-Stage Telescopic Cylinders are certified by leading international standards:

ISO 9001:2015

Quality management certification.

ISO 14001

Environmental compliance.

CE Certification

Ensures compliance with EU safety directives.

RoHS Compliance

Non-toxic and environmentally safe production.

DNV / GL / BV Approvals

Marine and offshore use certifications.

certificate