---
title: "Shaft Coupling / Adapter"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SHAFT_COUPLING_ADAPTER"
  data_integrity_hash: "8cf384682239697ffcdf0a8200db4a8b"
  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_COUPLING_ADAPTER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/shaft-coupling-adapter.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/shaft-coupling-adapter"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0-6000 N·m torque transmission, 0-6000 rpm rotational speed, ±3° angular misalignment, ±2 mm parallel misalignment, ±1 mm axial misalignment"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "MPa"
    consequence: "Fatigue failure from cyclic torsional loading (Goodman diagram), fretting wear at contact surfaces due to micro-motion, resonance at critical speed (natural frequency = 150 Hz), stress concentration at keyways (stress concentration factor Kt=2.5)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Torsional vibration exceeding 0.5 rad/s² at 2× operating frequency"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dynamic balancing to ISO 1940 G2.5 grade, finite element analysis for stress optimization, shot peening surface treatment (0.2 mm depth)"
  - node_2:
      trigger: "Lubrication starvation (oil film thickness &lt;5 μm)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system (0.5 L/min flow rate), PTFE coating (50 μm thickness), labyrinth seal design (0.1 mm clearance)"
bom_nodes:
  coupling_hub:
    type: "part"
    urn: "URN:CNFX:ME:COUPLING_HUB"
    interface_type: "physical-logic-coupled"
  fastening_bolts:
    type: "component"
    urn: "URN:CNFX:ME:FASTENING_BOLTS"
    interface_type: "physical-logic-coupled"
  key:
    type: "component"
    urn: "URN:CNFX:ME:KEY"
    interface_type: "physical-logic-coupled"
  flexible_element:
    type: "component"
    urn: "URN:CNFX:ME:FLEXIBLE_ELEMENT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/shaft-coupling-adapter.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "abccdb1d0732850d83a30b54651e3c8e87839c110564ebb2ecf3c362f36b8f3f"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Shaft Coupling / Adapter

## 1. Technical Definition
A mechanical component that connects two rotating shafts to transmit torque while accommodating misalignment.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-6000 N·m torque transmission, 0-6000 rpm rotational speed, ±3° angular misalignment, ±2 mm parallel misalignment, ±1 mm axial misalignment**. Failure boundary: **Yield strength of coupling material (e.g., 450 MPa for steel), 1.5× rated torque for overload, 7000 rpm for centrifugal force failure, ±5° angular misalignment, ±3 mm parallel misalignment**, Mechanism: **Fatigue failure from cyclic torsional loading (Goodman diagram), fretting wear at contact surfaces due to micro-motion, resonance at critical speed (natural frequency = 150 Hz), stress concentration at keyways (stress concentration factor Kt=2.5)**.

### 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 |
| :--- | :--- | :--- | :--- |
| Torsional vibration exceeding 0.5 rad/s² at 2× operating frequency | 8 | Fatigue crack initiation at keyway root radius (0.5 mm) | Dynamic balancing to ISO 1940 G2.5 grade, finite element analysis for stress optimization, shot peening surface treatment (0.2 mm depth) |
| Lubrication starvation (oil film thickness &lt;5 μm) | 8 | Galling and adhesive wear at spline interface | Forced lubrication system (0.5 L/min flow rate), PTFE coating (50 μm thickness), labyrinth seal design (0.1 mm clearance) |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Lathe**, **Gear Hobbing Machine**, **Dynamic Balancing Machine**  
**Downstream Applications**: Industrial Pumps, Conveyor Systems, Electric Motors  

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

### Q: What materials are available for shaft couplings and adapters?
**A**: Our shaft couplings and adapters are manufactured in steel, stainless steel, and aluminum alloy to suit various industrial applications and environmental conditions.

### Q: How do shaft couplings accommodate misalignment between rotating shafts?
**A**: Shaft couplings use flexible elements and specific designs to tolerate angular, parallel, and axial misalignment, protecting machinery from stress and wear while maintaining torque transmission.

### Q: What specifications should I consider when selecting a shaft coupling?
**A**: Key specifications include bore diameter (mm), maximum RPM, misalignment tolerance (degrees/mm), and torque capacity (Nm) to ensure compatibility with your machinery's requirements.

## 6. Manufacturing Compliance
- ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Shaft Coupling / Adapter](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/shaft-coupling-adapter)**

### 🌐 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_COUPLING_ADAPTER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a732250c
