Editorial Technical Reference

Hydraulic Cylinder

This page explains how Hydraulic Cylinder is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A mechanical actuator that converts hydraulic pressure into linear force and motion.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Hydraulic Cylinder

Definition
A hydraulic cylinder is a mechanical component that converts hydraulic fluid pressure into linear force and motion. It is a core element of hydraulic presses and other machinery, generating pressing force through the controlled application of pressurized fluid. The cylinder consists of a cylindrical barrel, a piston, a piston rod, and seals, which together create a sealed chamber where fluid pressure acts on the piston to produce linear movement. This movement is used for compression, forming, lifting, or other applications requiring controlled force and displacement. Hydraulic cylinders are available in a range of configurations to suit different operational requirements. Bore diameters typically range from 25 to 200 mm, with stroke lengths from 50 to 2000 mm, and piston rod diameters from 12 to 100 mm. Operating pressure is generally between 1.0 and 1.6 MPa, while maximum pressure can reach 16 to 35 MPa. Operating temperature should be maintained between -20°C and 80°C to ensure seal integrity. Sealing materials may include NBR (nitrile rubber) for oil applications or PTFE (polytetrafluoroethylene) for high-temperature environments. Cushioning can be adjustable or fixed to reduce end-of-stroke impact, and mounting types include flange or clevis configurations. Port sizes range from G1/4 to G1 inch, and ingress protection ratings vary from IP54 to IP65 depending on the environment. Weight depends on size and stroke, typically between 5 and 150 kg. These parameters are reference values and must be verified against the specific model and application. Standards such as ISO 6020-2, ISO 1629, ISO 228-1, and IEC 60529 are referenced for procurement and verification, but do not imply certification or compliance of any particular product. Always confirm model-specific values and standards with the legal manufacturer or supplier before selection or use.
Working Principle
Hydraulic fluid under pressure enters the cylinder chamber through a port, acting on the piston. The pressure differential across the piston creates a force proportional to the piston area and the fluid pressure. The piston moves linearly along the barrel, transmitting force through the piston rod. Direction of movement is controlled by valve systems that direct fluid flow into either side of the piston. The cylinder's seals prevent leakage and maintain pressure integrity. The force output is determined by the bore diameter and the operating pressure, while the stroke length defines the travel distance. Cushioning mechanisms may be employed to decelerate the piston near the end of stroke, reducing impact and wear.
Common Materials
Carbon Steel, Stainless Steel, Chrome-plated Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Bore Diameter25–200 mmDetermines force outputISO 6020-2
Stroke Length50–2000 mmCustom lengths available
Maximum Pressure16–35 MPaExceeding may cause seal failureISO 6020-2
Piston Rod Diameter12–100 mmAffects buckling strengthISO 6020-2
Operating Temperature-20–80 °COutside range may degrade seals
Sealing MaterialNBR–PTFENBR for oil, PTFE for high tempISO 1629
Cushioning TypeAdjustable–FixedReduces end-of-stroke impact
Mounting TypeFlange–ClevisMust match applicationISO 6020-2
Port SizeG1/4–G1 inchMatch hydraulic systemISO 228-1
Weight5–150 kgDepends on size and stroke
Ingress ProtectionIP54–IP65IP65 for dusty/wet environmentsIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Cylinder Barrel Part
    Contains hydraulic fluid and guides piston movement
  • Piston Part
    Separates pressure chambers and transmits force to rod
  • Piston Rod Part
    Transmits linear force to external load
  • End Caps Part
    Seal cylinder ends and provide mounting points
  • Seals and Gaskets Part
    Prevent hydraulic fluid leakage
  • Cushioning Mechanism Optional
    Decelerates the piston near end of stroke so it does not slam into the end cap.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 300 bar (4500 psi)
flow rate: Dependent on cylinder bore and rod size, typically 5-200 L/min
temperature: -20°C to 120°C
slurry concentration: Not applicable - hydraulic cylinders require clean hydraulic fluid, max particle size 10μm
Media Compatibility
✓ Hydraulic oil (ISO VG 32-68) ✓ Water-glycol fluids ✓ Phosphate ester fluids
Unsuitable: Saltwater or marine environments without special corrosion protection
Sizing Data Required
  • Required force output (kN or lbs)
  • Stroke length (mm or inches)
  • Operating pressure (bar or psi)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal Degradation
Cause: Contamination ingress (particles, water) leading to abrasive wear, chemical incompatibility with hydraulic fluid, or excessive heat causing hardening/cracking.
Rod Scoring/Galling
Cause: Misalignment creating side-loading, inadequate lubrication due to damaged wiper seals, or foreign particle abrasion from contaminated fluid.
Maintenance Indicators
  • External hydraulic fluid leakage around rod seals or cylinder body connections
  • Audible knocking or chattering during operation indicating cavitation or air entrapment
Engineering Tips
  • Implement strict fluid cleanliness protocols (ISO 4406 monitoring) and use high-efficiency filtration to prevent abrasive wear
  • Ensure proper cylinder alignment during installation and use rod protection systems (bellows/covers) to prevent contamination ingress

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 6020-2: Hydraulic fluid power - Mounting dimensions for single rod cylinders, 16 MPa series ANSI/CETOP RP 43P: Hydraulic fluid power - Cylinders - Bore and rod area ratios DIN 24334: Hydraulic cylinders - Piston rods with male thread

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.02 mm
  • Piston rod straightness: 0.1 mm per meter
Quality Inspection
  • Pressure test: 1.5 times maximum working pressure for 2 minutes
  • Hardness test: Brinell or Rockwell on piston rod surface

Manufacturers of Hydraulic Cylinder

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Hydraflu Hydraulic Co.
Shanghai, CN
CE
Listed on the company's own website · profile compiled by CNFX from public sources
Jinan Huachen Industrial Co., Ltd.
Shandong, CN
Founded 199836,000 m²
ISO9001 CE
Listed on the company's own website · profile compiled by CNFX from public sources
Ningbo Saivs Machinery Co., Ltd
Ningbo, Zhejiang, CN
Founded 1989
TS16949
Listed on the company's own website · profile compiled by CNFX from public sources
Beijing IWHR Corporation
Beijing, CN
Also makes: Discharge Gate
Listed on the company's own website · profile compiled by CNFX from public sources
Datong Hoidings Co., Limited
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Flutec Hydraulics
Wuxi, Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Fujian Zhenyuan Hydraulic Equipment Co., Ltd.
Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Hangzhou HZPT Machinery
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Jingyan Hydraulics
Beijing, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Junda Intelligent Equipment
Chongqing, CN
Listed on the company's own website · profile compiled by CNFX from public sources
JW HYDRAULIC LIMITED
Shanghai, CN
Also makes: Power Unit
Listed on the company's own website · profile compiled by CNFX from public sources
Machinesol
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
View All Factories

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the typical bore diameter range for a hydraulic cylinder?

The bore diameter typically ranges from 25 to 200 mm, as listed in the directory. This parameter determines the force output, as force is proportional to the piston area. Confirm the exact bore size for your application with the manufacturer.

What operating pressure should I expect?

The operating pressure is typically between 1.0 and 1.6 MPa, while the maximum pressure can reach 16 to 35 MPa. These values are reference ranges; always verify the pressure ratings for the specific cylinder model and application.

What sealing materials are available?

Sealing materials include NBR (nitrile rubber) for oil applications and PTFE for high-temperature environments. The choice depends on the fluid type and temperature. Refer to ISO 1629 for material classification and confirm with the supplier.

How do I choose the right mounting type?

Mounting types include flange and clevis configurations, as per ISO 6020-2. The selection depends on the application's structural requirements and space constraints. Always match the mounting type to the application and verify with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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