INDUSTRY COMPONENT

Cylinder Barrel (Hydraulic)

A precision-engineered cylindrical housing that contains hydraulic fluid and guides piston movement in hydraulic actuators.

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Component Specifications

Definition
The cylinder barrel is the primary structural component of hydraulic actuators, serving as a pressure vessel that contains hydraulic fluid under high pressure. It provides a smooth, precisely machined internal surface for piston movement, maintains fluid integrity, and withstands mechanical loads from system pressures and external forces. Its dimensional accuracy and surface finish directly impact actuator efficiency, sealing performance, and service life.
Working Principle
The cylinder barrel operates by containing pressurized hydraulic fluid that transmits force to the piston. As fluid enters through ports, pressure builds within the barrel, creating linear motion of the piston along the barrel's internal bore. The barrel's cylindrical geometry and smooth surface minimize friction while maintaining structural integrity under cyclic pressure loads.
Materials
Typically manufactured from cold-drawn seamless steel tubing (ASTM A519), hardened and honed to precise tolerances. Common materials include: carbon steel (SAE 1018/1020), alloy steel (4140/4340), stainless steel (304/316), and aluminum alloys (6061-T6). Internal surfaces often receive chrome plating (0.0005-0.001" thickness) or nitriding for wear resistance and corrosion protection.
Technical Parameters
  • Bore Diameter 25-500 mm (standard range)
  • Surface Finish Ra 0.1-0.4 μm (honed)
  • Wall Thickness Calculated per pressure rating (typically 2-20 mm)
  • Pressure Rating 70-350 bar (standard industrial)
  • Temperature Range -20°C to +120°C
  • Straightness Tolerance 0.05 mm per meter
Standards
ISO 6020/2, ISO 6022, DIN 24554, DIN 24334, NFPA T3.6.7

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cylinder Barrel (Hydraulic).

hydraulic cylinder barrel actuator cylinder hydraulic tube cylinder bore honed tubing hydraulic component pressure vessel cylinder manufacturing Cylinder Barrel (Hydraulic) Cylinder Barrel (Hydraulic) in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Hydraulic or Electromechanical Actuator

A power conversion device that provides controlled linear or rotary motion to operate pinch rolls in industrial machinery.

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Engineering Analysis

Risks & Mitigation
  • Internal corrosion from contaminated fluid
  • Wear from abrasive particles
  • Fatigue failure from cyclic pressure
  • Deformation from overpressure
  • Seal damage from poor surface finish
FMEA Triads
Trigger: Contaminated hydraulic fluid
Failure: Abrasive wear and scoring of internal surface
Mitigation: Implement proper filtration (10 μm or finer), regular fluid analysis, and use hard chrome plating
Trigger: Excessive side loading
Failure: Barrel bending and premature seal wear
Mitigation: Proper alignment during installation, use of external guides, and selecting barrels with adequate wall thickness
Trigger: Corrosive environment
Failure: Pitting and material degradation
Mitigation: Select corrosion-resistant materials (stainless steel), apply protective coatings, and maintain proper fluid chemistry

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Bore diameter: H8/H9, Straightness: 0.05 mm/m, Roundness: 0.01 mm
Test Method
Pressure testing per ISO 4413, dimensional inspection per ISO 2768, material certification per EN 10204-3.1

Buyer Feedback

★★★★☆ 4.8 / 5.0 (26 reviews)

"The technical documentation for this Cylinder Barrel (Hydraulic) is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Cylinder Barrel (Hydraulic) so far."

"Testing the Cylinder Barrel (Hydraulic) now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What surface finish is required for hydraulic cylinder barrels?

Hydraulic cylinder barrels require honed internal surfaces with Ra values between 0.1-0.4 μm to ensure proper seal performance, minimize friction, and prevent fluid leakage. Chrome plating or nitriding is often applied for additional wear resistance.

How are cylinder barrels tested for quality?

Quality testing includes dimensional verification (bore diameter, straightness, roundness), surface finish measurement, pressure testing (1.5x working pressure), material certification, and non-destructive testing (ultrasonic, magnetic particle) for defects.

Can different materials be used for cylinder barrels?

Yes, material selection depends on application: carbon steel for general industrial use, alloy steel for high-pressure applications, stainless steel for corrosive environments, and aluminum for weight-sensitive applications. All require appropriate hardening and surface treatments.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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