---
title: "Coupling Hub"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:COUPLING_HUB"
  data_integrity_hash: "86ad64773156268b5324db9b3b37767d"
  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:COUPLING_HUB"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/coupling-hub.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/coupling-hub"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-15000 N·m torque transmission, -40°C to 120°C ambient temperature, 0-6000 RPM rotational speed"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "MPa"
    consequence: "Fatigue failure from cyclic torsional loading exceeding material endurance limit (S-N curve), fretting corrosion at shaft-hub interface due to micro-motion under alternating torque, stress concentration at keyway corners exceeding yield strength"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm/mm angular or 0.1 mm parallel offset"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision machining of shaft and hub to H7/h6 tolerance, laser alignment during installation, flexible coupling design with angular compensation"
  - node_2:
      trigger: "Over-torque exceeding 1.5x rated capacity for 10+ cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Torque limiter integration, shear pin design with 1.25x safety factor, real-time torque monitoring with 90% load threshold alarm"
bom_nodes:
  bore:
    type: "component"
    urn: "URN:CNFX:ME:BORE"
    interface_type: "physical-logic-coupled"
  keyway:
    type: "component"
    urn: "URN:CNFX:ME:KEYWAY"
    interface_type: "physical-logic-coupled"
  flange-face:
    type: "component"
    urn: "URN:CNFX:ME:FLANGE_FACE"
    interface_type: "physical-logic-coupled"
  pilot-diameter:
    type: "component"
    urn: "URN:CNFX:ME:PILOT_DIAMETER"
    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/coupling-hub.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "34f564beb746b09090dcdc1fae97b546930562bf9b2aa2a9beef68e0d31f28c1"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Coupling Hub

## 1. Technical Definition
The central connecting element of a shaft coupling that mounts directly onto the shaft ends to transmit torque between rotating components.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-15000 N·m torque transmission, -40°C to 120°C ambient temperature, 0-6000 RPM rotational speed**. Failure boundary: **Shear stress exceeding 450 MPa in hub material, interference fit slippage at 0.15 mm radial displacement, torsional deflection exceeding 0.5 degrees per meter**, Mechanism: **Fatigue failure from cyclic torsional loading exceeding material endurance limit (S-N curve), fretting corrosion at shaft-hub interface due to micro-motion under alternating torque, stress concentration at keyway corners exceeding yield strength**.

### 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/mm angular or 0.1 mm parallel offset | 8 | Accelerated wear at hub bore, vibration-induced fatigue cracking | Precision machining of shaft and hub to H7/h6 tolerance, laser alignment during installation, flexible coupling design with angular compensation |
| Over-torque exceeding 1.5x rated capacity for 10+ cycles | 8 | Plastic deformation of keyway, shear failure of mounting bolts | Torque limiter integration, shear pin design with 1.25x safety factor, real-time torque monitoring with 90% load threshold alarm |

## 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**: **CNC Lathe**, **Heat Treatment Furnace**, **Coordinate Measuring Machine**  
**Downstream Applications**: Industrial Pumps, Conveyor Systems, Agricultural Machinery  

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

### Q: What materials are available for coupling hubs?
**A**: Our coupling hubs are manufactured in carbon steel, alloy steel, and stainless steel to suit different industrial environments and strength requirements.

### Q: How does a coupling hub transmit torque?
**A**: The coupling hub mounts directly onto shaft ends and uses its flange face, keyway, and pilot diameter to securely connect rotating components and transmit torque efficiently.

### Q: What specifications should I consider when selecting a coupling hub?
**A**: Key specifications include bore size, flange face dimensions, keyway measurements, and pilot diameter to ensure proper fit and torque transmission for your machinery.

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

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

### 🌐 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**: COUPLING_HUB | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: dada8d21
