Structured Manufacturing Data (2026)

Hydraulic Actuator Cylinder

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Hydraulic Actuator Cylinder used in the Basic Metal Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Hydraulic Actuator Cylinder is characterized by the integration of Cylinder Barrel and Piston Assembly. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength alloy steel (cylinder barrel, piston rod) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A hydraulic cylinder that converts hydraulic pressure into linear mechanical force to precisely control the roll gap in a rolling mill.

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Product Specifications

Technical details and manufacturing context for Hydraulic Actuator Cylinder

Definition
A critical component within the Heavy-Duty Rolling Mill Hydraulic Gap Control System, the hydraulic actuator cylinder is responsible for the precise, high-force linear positioning of the work rolls. It directly translates hydraulic pressure from the system's servo valves into controlled mechanical movement, enabling real-time adjustment of the gap between rolls to achieve the desired material thickness and profile during the metal rolling process.
Working Principle
Hydraulic fluid under high pressure, controlled by servo valves, is directed into the cylinder's chamber(s). This pressure acts upon the piston's surface area, generating a linear force (Force = Pressure × Area). The piston rod extends or retracts, moving the attached roll housing or chock to adjust the gap. Position feedback from transducers allows the system's controller to achieve closed-loop, micron-level precision.
Common Materials
High-strength alloy steel (cylinder barrel, piston rod), Ductile iron or forged steel (piston, end caps), Bronze or composite materials (wear rings, bearing strips), Specialized elastomers (seals, wipers)
Technical Parameters
  • Bore diameter and stroke length are primary specifications defining the cylinder's force output and range of motion. (mm) Standard Spec
Components / BOM
  • Cylinder Barrel
    Forms the pressure vessel containing the piston and hydraulic fluid; provides mounting interface.
    Material: High-strength honed alloy steel tube
  • Piston Assembly
    Seals the pressure chambers and transmits force from fluid pressure to the rod.
    Material: Forged steel or ductile iron with bronze wear rings
  • Piston Rod Part
    Transmits the linear force from the piston to the external load (roll chock).
    Material: Hard-chrome plated high-tensile alloy steel
  • Seal Kit Part
    Prevents internal and external leakage of hydraulic fluid and contaminants.
    Material: Polyurethane, Nitrile, or Fluorocarbon elastomers
  • Position Transducer
    Measures the real-time position of the piston rod for closed-loop feedback control.
    Material: Stainless steel housing with electronic components

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hydraulic Actuator Cylinder.

high-strength hydraulic actuator cylinder rolling mill precision roll gap control hydraulic cylinder alloy steel hydraulic actuator metal manufacturing durable hydraulic cylinder for rolling mill applications position transducer equipped hydrauli

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 350 bar (5000 psi)
flow rate: Up to 200 L/min
temperature: -20°C to +120°C
slurry concentration: Not applicable - clean hydraulic oil required
Media Compatibility
✓ Mineral-based hydraulic oil (ISO VG 32-68) ✓ Synthetic ester-based hydraulic fluid ✓ Water-glycol fire-resistant fluid
Unsuitable: High-particulate slurry environments without filtration
Sizing Data Required
  • Required force output (kN)
  • Stroke length (mm)
  • Operating pressure (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal Degradation
Cause: Contamination ingress, thermal cycling, chemical incompatibility, or improper installation leading to fluid leakage and pressure loss.
Rod Scoring/Pitting
Cause: Abrasive particles in hydraulic fluid, inadequate rod wiper seals, or misalignment causing surface damage and seal failure.
Maintenance Indicators
  • Visible hydraulic fluid leakage around rod seals or cylinder body
  • Audible knocking or irregular movement 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 rod alignment and install protective boots/bellows to shield rod surfaces from environmental contaminants

Compliance & Manufacturing Standards

Reference Standards
ISO 6020-2: Hydraulic fluid power - Mounting dimensions for single rod cylinders, 16 MPa series ANSI/(NFPA) T3.6.7 R1-2015: Fluid power - Cylinders - Bore and rod area ratios DIN ISO 3320: Fluid power systems and components - Cylinder bores and piston rod diameters - Metric series
Manufacturing Precision
  • Bore diameter: H8 tolerance (e.g., 100mm bore: +0.054mm/-0mm)
  • Piston rod diameter: f7 tolerance (e.g., 70mm rod: -0.030mm/-0.060mm)
Quality Inspection
  • Pressure test: Hydrostatic test to 1.5x maximum working pressure for 2 minutes
  • Surface finish inspection: Ra ≤ 0.4μm for bore, Ra ≤ 0.2μm for rod sealing surfaces

Factories Producing Hydraulic Actuator Cylinder

Manufacturer profiles with relevant production capability in China

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

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 materials are used in this hydraulic actuator cylinder for durability in metal manufacturing?

Our cylinder uses high-strength alloy steel for the barrel and piston rod, ductile iron or forged steel for pistons and end caps, bronze/composite wear components, and specialized elastomer seals to withstand harsh rolling mill environments.

How does this hydraulic cylinder achieve precise roll gap control in rolling mills?

The cylinder converts hydraulic pressure into linear mechanical force with exceptional accuracy, working with the integrated position transducer to provide real-time feedback for maintaining consistent roll gap dimensions during metal forming operations.

What maintenance is required for the seal components in this hydraulic actuator?

Regular inspection of the seal kit components - including specialized elastomer seals and wipers - is recommended. Replacement intervals depend on operating pressure cycles and environmental conditions, typically outlined in our maintenance schedule for basic metal manufacturing applications.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Basic Metal Manufacturing.

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.

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