Cylinder Barrel/Tube: Bore Diameter 50-500 mm

Component Specifications

Definition

The cylinder barrel, also called cylinder tube, is the primary pressure-containing component in hydraulic and pneumatic actuators. It serves as the cylindrical housing that encloses the piston assembly, maintains fluid pressure integrity, provides precise internal surface for piston sealing and movement, and transfers mechanical loads between mounting points. In lift cylinders, it withstands axial forces from hydraulic pressure while maintaining dimensional stability under varying loads and temperatures.

Working Principle

The cylinder barrel operates by containing pressurized hydraulic fluid or compressed air that acts upon the piston surface. Pressure differential across the piston creates linear force, while the barrel's precision-bored interior provides low-friction guidance for piston movement and maintains seal integrity through smooth surface finish and dimensional accuracy.

Materials

Cold-drawn seamless steel tubing (ASTM A519), honed to Ra 0.2-0.4 μm surface finish; Chrome-plated carbon steel for corrosion resistance; Aluminum alloys (6061-T6) for lightweight applications; Stainless steel (304/316) for corrosive environments

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	200-3000 mm
Bore Diameter	50-500 mm
Surface Finish	Ra 0.2-0.4 μm
Wall Thickness	6-40 mm
Pressure Rating	Up to 350 bar
Roundness Tolerance	IT7-IT8
Straightness Tolerance	0.1 mm/m

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

Standards

ISO 6020-2, DIN 24554, ISO 4394-1, DIN 2391

Parent Products

This component is used in the following industrial products

Lift Cylinder / Actuator

A hydraulic or pneumatic cylinder that provides the linear lifting force for the ladle in the lift and seal mechanism.

View Product Details

Engineering Analysis

Risks & Mitigation

Internal corrosion from contaminated fluid
Wear from abrasive particles
Fatigue cracking at high-cycle applications
Deformation under extreme pressure
Seal groove damage during assembly

FMEA Triads

Trigger: Contaminated hydraulic fluid
Failure: Abrasive wear and scoring of internal surface
Mitigation: Implement proper filtration systems (10 μm or finer), regular fluid analysis, and use of hard-chrome plating

Trigger: Excessive side loading
Failure: Premature wear and binding of piston
Mitigation: Proper cylinder alignment, use of external guides, and selection of appropriate mounting styles

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Bore diameter: H8/H9, Straightness: 0.1 mm/m max, Surface roughness: Ra ≤ 0.4 μm

Test Method

Hydrostatic pressure test per ISO 2944, dimensional verification per ISO 6020-2, surface roughness measurement per ISO 4287

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Cylinder Barrel/Tube

Manufacturer profiles associated with Cylinder Barrel/Tube.

Sourcing Cylinder Barrel/Tube from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

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

Related Components

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Frequently Asked Questions

What surface finish is required for cylinder barrels?

Cylinder barrels require honed interior surfaces with Ra 0.2-0.4 μm finish to ensure proper seal performance and minimize friction during piston movement.

How are cylinder barrels tested for pressure integrity?

Cylinder barrels undergo hydrostatic pressure testing at 1.5 times maximum working pressure, along with dimensional inspection, surface finish measurement, and material certification per ISO 6020 standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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 Barrel/Tube