Hydraulic cylinder

telescopicwith piston rodsteel

Overview
The multi-stage telescopic cylinder delivers long stroke from a compact retracted length via two or more sequential stages. Constructed with seamless honed tubes and induction-hardened, chrome-plated rods, it provides high load capacity, reliable sealing and extended service intervals for hydraulic systems used in mobile and stationary equipment.

Model and Brand

• Model: Multi-stage Type
• Brand: EAST AI

Advantages

• Compact retracted size: saves installation space in confined equipment.
• Extended stroke capability: up to 5–6× the closed length depending on configuration.
• High lifting capacity: suitable for heavy loads in construction, transport and material handling.
• Durability: induction-hardened chrome rods and high-performance seals for wear resistance.
• Customization: available in various bore sizes, strokes and stage counts.
• Leak-minimizing sealing system: reduces downtime and maintenance.
• Corrosion-resistant surface treatments for outdoor use.

Production Process

• Raw material selection: ST52, CK45 or alloy steels sourced for structural strength.
• Tube honing & skiving: internal finish to Ra ≤ 0.2 μm for optimal sealing.
• Rod processing: hard chrome plating and induction hardening for wear and corrosion resistance.
• Stage machining: precision machining of multiple stages for smooth sequential extension.
• Seal assembly: installation of Parker / Hallite / NOK seals.
• Welding & end-cap assembly: structural welding and fit-up for strength and alignment.
• Hydraulic pressure testing: hydrostatic testing at rated and safety test pressures.
• Surface treatment: powder coating, phosphating or painting according to application.
• Final inspection: dimensional, hardness and surface roughness checks before shipment.

Applications

• Construction machinery: dump trucks, tippers, excavators and loaders.
• Mining equipment: lifting systems, underground transport and drilling rigs.
• Agricultural machinery: harvesters, sprayers and tipping trailers.
• Material handling: cranes, lifting tables, forklifts and platforms.
• Logistics & transport: refuse trucks, cargo lifts and hydraulic tailgates.
• Marine & offshore: ship cranes and offshore lifting systems.

Product Details

• Product Name — Multi-Stage Telescopic Cylinder
• Bore Size Range — 50 mm – 400 mm
• Stroke Length — Up to 8000 mm (customized)
• Number of Stages — 2–6 stages
• Working Pressure — Up to 300 bar
• Material — ST52 / CK45 / 42CrMo4
• Rod Surface — Hard chrome plated, induction hardened
• Seal Brand — Parker / Hallite / NOK
• Temperature Range — -30°C to +120°C
• Mounting Options — Trunnion, clevis, flange, eye, lug mounting
• Standards — ISO 6022 / DIN / custom

Factory Inventory & Capacity

• Large stock of honed tubes and chrome-plated rods.
• Semi-finished telescopic stages for customized assembly.
• Ready-to-ship cylinders in common configurations.
• Monthly production capacity exceeding 8,000 hydraulic cylinders.
• Supply chain systems supporting stable global delivery.

Quality Inspection

• Dimensional accuracy: bore and rod sizes checked with micrometer precision.
• Surface roughness: honed tube finish verified to Ra ≤ 0.2 μm.
• Hardness test: rods tested after heat treatment to specified HRC range.
• Welding quality: ultrasonic inspection for weld integrity.
• Hydraulic pressure test: all cylinders tested up to 1.5× working pressure.
• Corrosion resistance: chrome plating tested in salt spray chambers.

Certifications

• ISO 9001:2015
• ISO 14001
• CE Marking
• RoHS Certification
• DNV / GL / BV marine approvals

Technical Specifications

• Product Name — Multi-Stage Telescopic Cylinder
• Bore Size Range — 50 mm – 400 mm
• Stroke Length — Up to 8000 mm (customized)
• Number of Stages — 2–6 stages
• Working Pressure — Up to 300 bar
• Material — ST52 / CK45 / 42CrMo4
• Rod Surface — Hard chrome plated, induction hardened
• Seal Brand — Parker / Hallite / NOK
• Temperature Range — -30°C to +120°C
• Mounting Options — Trunnion, clevis, flange, eye, lug mounting
• Standards — ISO 6022 / DIN / custom