---
title: "Large Bore Cylinder/Piston"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LARGE_BORE_CYLINDERPISTON"
  data_integrity_hash: "cfb281ae40069f17110afd5ff47bf46b"
  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:LARGE_BORE_CYLINDERPISTON"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/large-bore-cylinderpiston.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/large-bore-cylinderpiston"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-35 MPa hydraulic, 0.1-1.5 MPa pneumatic"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "Cavitation-induced pitting from pressure drops below fluid vapor pressure, thermal fatigue from cyclic heating above 150°C causing microcracking"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination with 15 μm+ particles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 10 μm absolute filtration with pressure differential monitoring"
  - node_2:
      trigger: "Side loading exceeding 5% of axial force capacity"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate external guide rails with 0.02 mm/m alignment tolerance"
bom_nodes:
  cylinder-barrel:
    type: "part"
    urn: "URN:CNFX:ME:CYLINDER_BARREL"
    interface_type: "physical-logic-coupled"
  piston:
    type: "component"
    urn: "URN:CNFX:ME:PISTON"
    interface_type: "physical-logic-coupled"
  piston-rod:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_ROD"
    interface_type: "physical-logic-coupled"
  end-caps:
    type: "component"
    urn: "URN:CNFX:ME:END_CAPS"
    interface_type: "physical-logic-coupled"
  seals-and-gaskets:
    type: "component"
    urn: "URN:CNFX:ME:SEALS_AND_GASKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/large-bore-cylinderpiston.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "20b4aaed8d984a784898d5ef0bb2791c7e4adb766bdcee701a24cb664fe70baa"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Large Bore Cylinder/Piston

## 1. Technical Definition
A hydraulic or pneumatic component consisting of a cylinder with a large internal diameter and a piston that moves within it to generate linear force and motion.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-35 MPa hydraulic, 0.1-1.5 MPa pneumatic**. Failure boundary: **Cylinder wall stress exceeds 250 MPa yield strength for steel, piston seal temperature exceeds 200°C elastomer degradation threshold**, Mechanism: **Cavitation-induced pitting from pressure drops below fluid vapor pressure, thermal fatigue from cyclic heating above 150°C causing microcracking**.

### 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 |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination with 15 μm+ particles | 8 | Seal extrusion and scoring of cylinder bore surface | Install 10 μm absolute filtration with pressure differential monitoring |
| Side loading exceeding 5% of axial force capacity | 8 | Piston rod bending and premature bushing wear | Integrate external guide rails with 0.02 mm/m alignment tolerance |

## 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)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Pneumatic Compressor System**, **Control Valve Manifold**  
**Downstream Applications**: Construction Equipment Booms, Industrial Presses, Marine Steering Systems  

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

### Q: What are the main applications for large bore cylinders in machinery manufacturing?
**A**: Large bore cylinders are essential for heavy machinery requiring high linear force, such as construction equipment, industrial presses, material handling systems, and manufacturing automation where substantial pushing, pulling, or lifting power is needed.

### Q: How do I choose between chrome-plated steel, cast iron, and aluminum alloy for my cylinder?
**A**: Chrome-plated steel offers superior corrosion resistance and durability for harsh environments. Cast iron provides excellent strength and vibration damping for high-load applications. Aluminum alloy is ideal for weight-sensitive applications where corrosion resistance and moderate strength are priorities.

### Q: What maintenance is required for large bore cylinders to ensure longevity?
**A**: Regular inspection of seals and gaskets for wear, monitoring hydraulic fluid cleanliness, checking for piston rod scoring or corrosion, and ensuring proper alignment during installation. Preventive maintenance schedules should include seal replacement and lubrication as specified by the manufacturer.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Large Bore Cylinder/Piston](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/large-bore-cylinderpiston)**

### 🌐 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**: LARGE_BORE_CYLINDERPISTON | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d0844780
