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Cylinder Tube Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

The cylinder tube is the primary structural component of a cylinder body that forms the pressure chamber, providing a smooth bore surface for piston sealing and movement. It maintains internal pressure integrity while withstanding mechanical loads from piston forces and external mounting stresses. Critical dimensions include bore diameter, wall thickness, straightness, and surface finish to ensure proper sealing and alignment.

Working Principle

Converts fluid pressure energy into linear mechanical motion by containing pressurized air/hydraulic fluid that acts upon the piston surface. The tube's precision bore guides piston travel while maintaining pressure-tight sealing through surface finish and dimensional accuracy.

Materials

Carbon steel (ST52, S45C), stainless steel (304, 316), aluminum alloy (6061-T6), brass. Hard chrome plating (20-40μm) or nickel plating for wear/corrosion resistance. Honed ID surface finish Ra 0.2-0.8μm.

Technical Parameters

Straightness ≤0.1mm/m
Bore Diameter 10-500mm
Surface Finish Ra 0.2-0.8μm
Wall Thickness 2-25mm
Pressure Rating 1-35MPa
Temperature Range -20°C to 200°C

Standards

ISO 6020, ISO 6022, DIN 24554, JIS B8354

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cylinder Tube.

Parent Products

This component is used in the following industrial products

Cylinder Body

The main structural housing of a soft-close damper that contains the piston and hydraulic fluid.

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Piston/cylinder assembly

A mechanical assembly consisting of a piston moving within a cylinder, converting fluid pressure into linear motion.

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Engineering Analysis

Risks & Mitigation

Internal scoring/scratching
Corrosion pitting
Wall deformation under pressure
Seal groove damage
Thread stripping at ports

FMEA Triads

Trigger: Contaminated hydraulic fluid
Failure: Internal surface scoring leading to seal leakage
Mitigation: Install proper filtration (10μm absolute), regular fluid analysis, use wiper seals

Trigger: Insufficient wall thickness for operating pressure
Failure: Tube deformation or catastrophic rupture
Mitigation: Design with 4:1 safety factor, pressure testing at 1.5× operating pressure, material certification

Trigger: Corrosive environment without proper protection
Failure: Pitting corrosion reducing pressure integrity
Mitigation: Select corrosion-resistant materials (stainless steel, proper plating), apply protective coatings, environmental controls

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Bore diameter: H8-H9, Straightness: ≤0.1mm/m, Surface finish: Ra 0.2-0.8μm

Test Method

Pressure testing (1.5× operating pressure), dimensional inspection (CMM), surface roughness measurement, material certification (mill test reports)

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between honed and chrome plated cylinder tubes?

Honed tubes have a precisely finished internal surface (Ra 0.2-0.8μm) for optimal sealing, while chrome plated tubes have a hard chromium layer (20-40μm) applied to the ID for enhanced wear and corrosion resistance. Many industrial cylinders use both processes.

How do I select the right wall thickness for a cylinder tube?

Wall thickness is determined by operating pressure, safety factor (typically 4:1), material yield strength, and bore diameter. Use Barlow's formula: t = (P × D) / (2 × S × E) where P=pressure, D=bore, S=material strength, E=efficiency factor.

What causes cylinder tube scoring and how to prevent it?

Scoring results from contamination, misalignment, inadequate lubrication, or piston seal failure. Prevention includes proper filtration (10μm or better), correct rod alignment, appropriate fluid viscosity, and regular maintenance of seals and wipers.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Cylinder Tube