---
title: "Main Cylinder"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:MAIN_CYLINDER"
  data_integrity_hash: "982e8d2dc65038d29d5c786742d743d1"
  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:MAIN_CYLINDER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/main-cylinder.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/main-cylinder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "150-350 bar"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "bar"
    consequence: "Cavitation-induced pitting from pressure drops below 0.5 bar absolute during retraction cycles, combined with cyclic fatigue at stress concentrations near port connections"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Particulate contamination exceeding ISO 4406 18/16/13 in hydraulic fluid"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install dual 3-micron absolute filters with differential pressure monitoring and automatic bypass at 2 bar ΔP"
  - node_2:
      trigger: "Seal degradation from fluid temperature sustained above 82°C for &gt;100 hours"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate PTFE composite seals with embedded temperature sensors and active cooling loop maintaining 65±5°C"
bom_nodes:
  cylinder-barrel:
    type: "component"
    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/main-cylinder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "a3d9d315e43a20f04a8bd380a4b718e6fc3d1279b05cfaf385455e278536cc43"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Main Cylinder

## 1. Technical Definition
Primary hydraulic actuator that generates the main stamping force in a hydraulic press

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **150-350 bar**. Failure boundary: **450 bar (yield strength of SAE 4140 steel at 150°C)**, Mechanism: **Cavitation-induced pitting from pressure drops below 0.5 bar absolute during retraction cycles, combined with cyclic fatigue at stress concentrations near port connections**.

### 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 |
| :--- | :--- | :--- | :--- |
| Particulate contamination exceeding ISO 4406 18/16/13 in hydraulic fluid | 8 | Spool valve sticking causing asymmetric cylinder extension | Install dual 3-micron absolute filters with differential pressure monitoring and automatic bypass at 2 bar ΔP |
| Seal degradation from fluid temperature sustained above 82°C for &gt;100 hours | 8 | Internal leakage reducing force output by &gt;15% at 300 bar | Integrate PTFE composite seals with embedded temperature sensors and active cooling loop maintaining 65±5°C |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Hydraulic Fluid Filtration System**, **Hydraulic Press Control System**  
**Downstream Applications**: Automotive Body Panels, Aerospace Structural Components, Industrial Metal Stampings  

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

### Q: What materials are used in your main cylinders for durability?
**A**: Our main cylinders are constructed from high-strength alloy steel with chromium-plated surfaces and bronze bushings to withstand extreme pressures and reduce wear in hydraulic press applications.

### Q: How does the main cylinder generate stamping force in hydraulic presses?
**A**: The main cylinder acts as the primary hydraulic actuator, converting hydraulic pressure into linear mechanical force through its piston and rod assembly to deliver the precise stamping force required for metal forming operations.

### Q: What maintenance is required for main cylinders in industrial presses?
**A**: Regular inspection of seals, gaskets, and bronze bushings is essential. Proper lubrication and monitoring of hydraulic fluid quality help maintain optimal performance and extend the cylinder's service life in machinery applications.

## 6. Manufacturing Compliance

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Main Cylinder](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/main-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**: MAIN_CYLINDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b2c485d2
