---
title: "Flywheel"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FLYWHEEL"
  data_integrity_hash: "c0f051917e2afbdca25c13156bd3fbbd"
  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:FLYWHEEL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/flywheel.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/flywheel"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1000-15000 RPM"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 800
    unit: "MPa"
    consequence: "Centrifugal stress exceeding material yield strength due to rotational inertia"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Bearing lubrication degradation below 0.1 mm oil film thickness"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hydrodynamic bearing design with 0.15 mm minimum oil film thickness"
  - node_2:
      trigger: "Material fatigue crack propagation at 10^7 stress cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forged steel construction with 1000 MPa ultimate tensile strength"
bom_nodes:
  flywheel-hub:
    type: "component"
    urn: "URN:CNFX:ME:FLYWHEEL_HUB"
    interface_type: "physical-logic-coupled"
  flywheel-rim:
    type: "component"
    urn: "URN:CNFX:ME:FLYWHEEL_RIM"
    interface_type: "physical-logic-coupled"
  keyway:
    type: "component"
    urn: "URN:CNFX:ME:KEYWAY"
    interface_type: "physical-logic-coupled"
  bolt-holes:
    type: "component"
    urn: "URN:CNFX:ME:BOLT_HOLES"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1940-1:2003 - MECHANICAL VIBRATION - BALANCE QUALITY REQUIREMENTS FOR ROTORS IN A CONSTANT (RIGID) STATE"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/AGMA 2000-A88 - GEAR CLASSIFICATION AND INSPECTION HANDBOOK (FOR FLYWHEELS WITH GEAR TEETH)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 740-1:2016 - FLYWHEELS FOR INTERNAL COMBUSTION ENGINES - DIMENSIONS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/flywheel.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "1b9cff0c1c834ec8f64af5b010bef8d30b2298b055f0064225d2a2ede33bb977"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Flywheel

## 1. Technical Definition
A rotating mechanical device that stores rotational energy to maintain consistent motion and momentum in machinery.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1000-15000 RPM**. Failure boundary: **Tensile stress exceeding 800 MPa at 16000 RPM**, Mechanism: **Centrifugal stress exceeding material yield strength due to rotational inertia**.

### 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 |
| :--- | :--- | :--- | :--- |
| Bearing lubrication degradation below 0.1 mm oil film thickness | 8 | Rotational imbalance exceeding 0.05 mm displacement | Hydrodynamic bearing design with 0.15 mm minimum oil film thickness |
| Material fatigue crack propagation at 10^7 stress cycles | 8 | Flywheel fracture at 12000 RPM | Forged steel construction with 1000 MPa ultimate tensile strength |

## 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**: **Electric Motor**, **Variable Frequency Drive**, **Cooling System**  
**Downstream Applications**: Industrial Pumps, Power Generators, Automotive Transmissions  

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

### Q: What are the main differences between cast iron, cast steel, and forged steel flywheels?
**A**: Cast iron flywheels offer good vibration damping and cost-effectiveness for standard applications. Cast steel provides higher strength and impact resistance. Forged steel delivers superior durability, fatigue resistance, and performance for high-stress, heavy-duty machinery.

### Q: How does a flywheel maintain consistent motion in machinery?
**A**: A flywheel stores rotational kinetic energy during periods of excess power and releases it during power dips, smoothing out speed fluctuations. This inertia helps maintain consistent momentum, reduce vibrations, and improve efficiency in engines, presses, and other rotating equipment.

### Q: What should I consider when specifying bolt holes and keyway dimensions on a flywheel?
**A**: Bolt hole patterns must match your shaft coupling specifications for secure mounting, considering torque loads and safety factors. Keyway dimensions (width, depth, length) must correspond precisely to the shaft key to prevent slippage and ensure reliable power transmission. Always consult engineering standards.

## 6. Manufacturing Compliance
- ISO 1940-1:2003 - MECHANICAL VIBRATION - BALANCE QUALITY REQUIREMENTS FOR ROTORS IN A CONSTANT (RIGID) STATE
- ANSI/AGMA 2000-A88 - GEAR CLASSIFICATION AND INSPECTION HANDBOOK (FOR FLYWHEELS WITH GEAR TEETH)
- DIN 740-1:2016 - FLYWHEELS FOR INTERNAL COMBUSTION ENGINES - DIMENSIONS

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

### 🌐 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**: FLYWHEEL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 6d2e06e9
