---
title: "Piston/Rotor Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PISTONROTOR_ASSEMBLY"
  data_integrity_hash: "57be1391a4d1802eb9ace3d299b6ed47"
  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:PISTONROTOR_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pistonrotor-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pistonrotor-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-35 MPa (1-350 bar)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "High-cycle fatigue failure due to cyclic stress exceeding material endurance limit (σ_e = 0.5σ_UTS) at 10^7 cycles, accelerated by thermal expansion mismatch (Δα = 23×10^-6 K^-1) between piston/cylinder materials"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Insufficient lubrication film thickness (h_min &lt; 1 μm) at 3000 rpm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.05 MPa minimum pressure and 40 μm filtration"
  - node_2:
      trigger: "Compression ratio exceeding 15:1 at 100°C inlet temperature"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Knock sensor with 2 ms response time controlling variable valve timing"
bom_nodes:
  piston:
    type: "part"
    urn: "URN:CNFX:ME:PISTON"
    interface_type: "physical-logic-coupled"
  piston-rings:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_RINGS"
    interface_type: "physical-logic-coupled"
  connecting-rod:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTING_ROD"
    interface_type: "physical-logic-coupled"
  wrist-pin-piston-pin:
    type: "component"
    urn: "URN:CNFX:ME:WRIST_PIN_PISTON_PIN"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.1-1967 (R2009) (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 7190:2001 (INTERFERENCE FITS - CALCULATION AND DESIGN RULES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pistonrotor-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "5ab290f3ea80ec6da6ba9a5392677b125c5f556c75e1d196924b909a1c1f36ea"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Piston/Rotor Assembly

## 1. Technical Definition
The reciprocating or rotating component assembly that compresses air within an air compressor cylinder.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-35 MPa (1-350 bar)**. Failure boundary: **Yield strength threshold: 250 MPa for aluminum alloys, 450 MPa for steel alloys at 150°C**, Mechanism: **High-cycle fatigue failure due to cyclic stress exceeding material endurance limit (σ_e = 0.5σ_UTS) at 10^7 cycles, accelerated by thermal expansion mismatch (Δα = 23×10^-6 K^-1) between piston/cylinder materials**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Insufficient lubrication film thickness (h_min &lt; 1 μm) at 3000 rpm | 8 | Boundary lubrication regime leading to adhesive wear (μ &gt; 0.3) | Forced lubrication system with 0.05 MPa minimum pressure and 40 μm filtration |
| Compression ratio exceeding 15:1 at 100°C inlet temperature | 8 | Detonation-induced piston ring fracture at 5 kHz vibration frequency | Knock sensor with 2 ms response time controlling variable valve timing |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Piston](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/piston.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Air Compressor Cylinder**, **Compressor Lubrication System**, **Compressed Air Dryer**  
**Downstream Applications**: Compressed Air Systems, Pneumatic Tools, Industrial Automation Equipment  

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

### Q: What materials are used in piston/rotor assemblies for air compressors?
**A**: Our piston/rotor assemblies are manufactured from high-quality materials including cast iron for durability, aluminum alloy for lightweight performance, and steel for maximum strength in demanding industrial applications.

### Q: What components are included in a complete piston/rotor assembly?
**A**: A complete assembly includes the piston, piston rings for sealing, connecting rod for motion transfer, and wrist pin (piston pin) for secure connection between piston and connecting rod.

### Q: How does the piston/rotor assembly function in an air compressor?
**A**: The assembly reciprocates or rotates within the compressor cylinder, creating compression by reducing air volume. This process generates pressurized air for various industrial machinery and equipment applications.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)
- ANSI B4.1-1967 (R2009) (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)
- DIN 7190:2001 (INTERFERENCE FITS - CALCULATION AND DESIGN RULES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Piston/Rotor Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pistonrotor-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PISTONROTOR_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 08b002fe
