Hydraulic cylinder

telescopicwith piston rodsteel

Product Overview
The Two-stage Telescopic Cylinder is a specialized hydraulic cylinder designed with two telescoping stages, allowing long strokes in a compact retracted length. Built with seamless honed tubes and chrome-plated rods for durability, smooth extension and high load-bearing capacity. Ideal for dump trucks, trailers, cranes and heavy machinery requiring long extension with minimal mounting space.

Model & Brand

• Model: Telescopic Type
• Brand: EAST AI

Advantages

• Space-saving design: achieves long strokes with short retracted length
• Sequential extension: controlled, step-by-step movement for stable operation
• High load capacity: built with strong materials to withstand heavy vertical and horizontal loads
• Versatility: suitable for lifting, tilting, pushing and compacting applications
• Durability: manufactured from honed steel tubes and chrome rods for extended service life
• Reduced maintenance: fewer moving components reduce downtime and servicing costs
• Corrosion resistance: chrome-plated rods resist rust and wear in harsh environments
• Customizable options: available in various bore sizes, strokes and mounting configurations

Production Process

• Raw material selection: premium ST52, CK45, 20MnV6 or 42CrMo steels
• Tube honing: internal honing ensures smooth surfaces with Ra ≤ 0.2 μm
• Rod processing: chrome-plated rods are machined, hardened and ground for strength
• Stage machining: precision machining of each telescopic stage for seamless movement
• Welding & Assembly: robotic welding guarantees strong, leak-free joints
• Seal installation: high-performance seals (Parker, Hallite, NOK) prevent oil leakage
• Pressure testing: each cylinder is tested under 1.5 times the rated pressure
• Surface coating: painting, powder coating or phosphating for corrosion protection
• Final inspection: dimensional checks, hardness tests, and cycle testing before shipment

Applications

• Dump trucks & trailers: lifting and tilting of heavy loads
• Cranes & lifting equipment: long extension in limited mounting space
• Agricultural machinery: harvesters, sprayers and grain handling systems
• Mining equipment: haul trucks, loaders and underground lifting devices
• Marine industry: ship deck machinery and offshore hydraulic systems
• Industrial equipment: hydraulic presses, compactors and material handling systems

Product Details
Specification | Details
Product Name: Two-stage Telescopic Cylinder
Bore Size Range: 80 mm – 400 mm
Stroke Length: Up to 6000 mm (customized)
Working Pressure: Up to 300 bar
Material: ST52 / CK45 / 20MnV6 / 42CrMo
Rod Surface: Hard Chrome Plated, Induction Hardened
Number of Stages: Two (sequential extension)
Seal Brand: Parker / Hallite / NOK
Temperature Range: -30°C to +120°C
Mounting Options: Flange, Trunnion, Clevis, Eye Mount
Standards: ISO 6022 / DIN / Custom

Factory Inventory & Quality

• Large stock of honed tubes and chrome rods in multiple sizes
• Pre-machined telescopic stages ready for final assembly
• Semi-finished cylinders available for custom orders
• Monthly output capacity of 12,000+ hydraulic cylinders
• Quality inspection: dimensional accuracy, surface roughness to Ra ≤ 0.2 μm, hardness tests, pressure and cycle testing, ultrasonic welding inspection and salt spray testing

Features / Technical Specifications

• Product Name: Two-stage Telescopic Cylinder
• Bore Size Range: 80 mm – 400 mm
• Stroke Length: Up to 6000 mm (customized)
• Working Pressure: Up to 300 bar
• Material: ST52 / CK45 / 20MnV6 / 42CrMo
• Rod Surface: Hard Chrome Plated, Induction Hardened
• Number of Stages: Two
• Seal Brand: Parker / Hallite / NOK
• Temperature Range: -30°C to +120°C
• Mounting Options: Flange, Trunnion, Clevis, Eye Mount
• Standards: ISO 6022 / DIN / Custom