---
title: "Hydraulic Actuator Cylinder"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HYDRAULIC_ACTUATOR_CYLINDER"
  data_integrity_hash: "f061e5012b0eb8baf0b03df796d8bf5e"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:HYDRAULIC_ACTUATOR_CYLINDER"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/hydraulic-actuator-cylinder.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/hydraulic-actuator-cylinder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-300 bar"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 350
    unit: "bar"
    consequence: "Yield strength exceedance of cylinder barrel material (ASTM A36 steel, σ_y=250 MPa) causing plastic deformation and seal extrusion"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant particle ingress exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 3μm absolute beta_10≥1000 filter with differential pressure monitoring"
  - node_2:
      trigger: "Piston rod surface roughness degradation below Ra=0.4μm due to abrasive wear"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hard chrome plating (0.05mm thickness) with 65 HRC hardness and weekly profilometer inspection"
bom_nodes:
  cylinder-barrel:
    type: "part"
    urn: "URN:CNFX:ME:CYLINDER_BARREL"
    interface_type: "physical-logic-coupled"
  piston-assembly:
    type: "part"
    urn: "URN:CNFX:ME:PISTON_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  piston-rod:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_ROD"
    interface_type: "physical-logic-coupled"
  seal-kit:
    type: "component"
    urn: "URN:CNFX:ME:SEAL_KIT"
    interface_type: "physical-logic-coupled"
  position-transducer:
    type: "part"
    urn: "URN:CNFX:ME:POSITION_TRANSDUCER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ANSI/(NFPA) T3.6.7 R1-2015: FLUID POWER - CYLINDERS - BORE AND ROD AREA RATIOS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/hydraulic-actuator-cylinder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "392d593686aa2e9b55e32dd419a403d4a9dd2973ea296de40453ce136c1d5580"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Hydraulic Actuator Cylinder

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

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-300 bar**. Failure boundary: **350 bar static pressure or 450 bar dynamic pressure**, Mechanism: **Yield strength exceedance of cylinder barrel material (ASTM A36 steel, σ_y=250 MPa) causing plastic deformation and seal extrusion**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant particle ingress exceeding ISO 4406 18/16/13 cleanliness level | 8 | Spool valve stiction causing position control oscillation ±0.5mm | Install 3μm absolute beta_10≥1000 filter with differential pressure monitoring |
| Piston rod surface roughness degradation below Ra=0.4μm due to abrasive wear | 8 | Rod seal (e.g., Parker Polypak) extrusion failure at 1.5mm radial deflection | Hard chrome plating (0.05mm thickness) with 65 HRC hardness and weekly profilometer inspection |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Cylinder Barrel](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/cylinder-barrel.md) `(Standalone System)`
- [Piston Assembly](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/piston-assembly.md) `(Standalone System)`
- [Position Transducer](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/position-transducer.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Roll Gap Control System**, **High-Pressure Hydraulic Hoses**  
**Downstream Applications**: Steel Sheets, Aluminum Coils, Metal Plates  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in this hydraulic actuator cylinder for durability in metal manufacturing?
**A**: 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.

### Q: How does this hydraulic cylinder achieve precise roll gap control in rolling mills?
**A**: 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.

### Q: What maintenance is required for the seal components in this hydraulic actuator?
**A**: 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.

## 6. Manufacturing Compliance
- ANSI/(NFPA) T3.6.7 R1-2015: FLUID POWER - CYLINDERS - BORE AND ROD AREA RATIOS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Hydraulic Actuator Cylinder](https://cnfx.com/industry/basic-metal-manufacturing/product/hydraulic-actuator-cylinder)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: HYDRAULIC_ACTUATOR_CYLINDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: acab23e8
