---
title: "Shaft Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SHAFT_ASSEMBLY"
  data_integrity_hash: "1343c42534e215fb09ff803e8d5e0933"
  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:SHAFT_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/shaft-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/shaft-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-15000 rpm at 10^-6 to 10^-3 mbar vacuum pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 18000
    unit: "rpm"
    consequence: "Resonance-induced fatigue fracture at natural frequency nodes or bearing seizure from lubricant breakdown at 120°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm/m during assembly"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser alignment during installation with &lt;0.02 mm/m tolerance and dynamic balancing to G2.5 grade"
  - node_2:
      trigger: "Inadequate lubrication film thickness &lt;1 μm at Hertzian contact points"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced oil circulation system maintaining 0.5-1.0 bar pressure and 40-60°C oil temperature"
bom_nodes:
  shaft-body:
    type: "component"
    urn: "URN:CNFX:ME:SHAFT_BODY"
    interface_type: "physical-logic-coupled"
  keyway:
    type: "component"
    urn: "URN:CNFX:ME:KEYWAY"
    interface_type: "physical-logic-coupled"
  bearing-journals:
    type: "component"
    urn: "URN:CNFX:ME:BEARING_JOURNALS"
    interface_type: "physical-logic-coupled"
  seal-surface:
    type: "component"
    urn: "URN:CNFX:ME:SEAL_SURFACE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-1:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/shaft-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d60b80085290128abc67c82f0f89e6191034e9cb044abd0748e24b2cd1c890ad"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Shaft Assembly

## 1. Technical Definition
A rotating mechanical component that transmits torque and supports rotating elements within a vacuum pump/motor system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-15000 rpm at 10^-6 to 10^-3 mbar vacuum pressure**. Failure boundary: **Critical speed exceeding 1.2×first natural frequency (e.g., 18000 rpm for 15000 rpm design) or radial deflection &gt;50 μm**, Mechanism: **Resonance-induced fatigue fracture at natural frequency nodes or bearing seizure from lubricant breakdown at 120°C**.

### 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 |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.05 mm/m during assembly | 8 | Whirling vibration amplitude &gt;100 μm at 0.8×operating speed | Laser alignment during installation with &lt;0.02 mm/m tolerance and dynamic balancing to G2.5 grade |
| Inadequate lubrication film thickness &lt;1 μm at Hertzian contact points | 8 | Bearing temperature rise &gt;40°C above ambient within 30 minutes | Forced oil circulation system maintaining 0.5-1.0 bar pressure and 40-60°C oil temperature |

## 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**: **Balancing Machine**, **Dynamic Testing Rig**, **Laser Alignment System**  
**Downstream Applications**: Industrial Vacuum Pumps, High-Speed Electric Motors, Turbomolecular Pumps  

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

### Q: What materials are available for this shaft assembly?
**A**: Our shaft assemblies are manufactured from high-grade Stainless Steel or Alloy Steel, selected for durability, corrosion resistance, and strength in demanding industrial environments.

### Q: What are the key components of this shaft assembly?
**A**: The assembly includes a Shaft Body, precision-machined Keyway for secure coupling, Bearing Journals for smooth rotation support, and a Seal Surface to maintain system integrity in vacuum applications.

### Q: What is the primary function of this shaft assembly?
**A**: This rotating mechanical component transmits torque and provides critical support for rotating elements within vacuum pump and motor systems, ensuring reliable operation in machinery and equipment.

## 6. Manufacturing Compliance
- ISO 286-1:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)
- ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Shaft Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/shaft-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**: SHAFT_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8c4bc201
