---
title: "Drum Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DRUM_ASSEMBLY"
  data_integrity_hash: "2d0b720aa885a47306069aaf52db41f3"
  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:DRUM_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drum-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drum-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kN cable tension, 0-60 rpm rotation, -40°C to 85°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 180
    unit: "kN"
    consequence: "Plastic deformation occurs when applied stress exceeds material yield strength (σ_y = 355 MPa for S355 structural steel), governed by Hooke's Law (σ = Eε) and Tresca yield criterion; bearing failure follows Hertzian contact stress theory with maximum shear stress τ_max = 0.3p_0 exceeding material fatigue limit"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cable misalignment angle exceeding 3° during spooling"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install helical groove guide system with 0.5 mm precision laser alignment sensors"
  - node_2:
      trigger: "Corrosion pitting depth exceeding 0.8 mm in marine environments"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Apply 300 μm zinc-nickel electroplating coating with 100 μm epoxy topcoat"
bom_nodes:
  drum-cylinder:
    type: "part"
    urn: "URN:CNFX:ME:DRUM_CYLINDER"
    interface_type: "physical-logic-coupled"
  end-flanges:
    type: "component"
    urn: "URN:CNFX:ME:END_FLANGES"
    interface_type: "physical-logic-coupled"
  shaft:
    type: "component"
    urn: "URN:CNFX:ME:SHAFT"
    interface_type: "physical-logic-coupled"
  bearings:
    type: "part"
    urn: "URN:CNFX:ME:BEARINGS"
    interface_type: "physical-logic-coupled"
  mounting-brackets:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKETS"
    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/drum-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "71380feeb552fd5aca60755230df1d7a3038409378b9bf35c71a0ec5bea0eefa"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Drum Assembly

## 1. Technical Definition
The rotating cylindrical component of a constant tension winch that stores and releases cable or rope.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kN cable tension, 0-60 rpm rotation, -40°C to 85°C ambient temperature**. Failure boundary: **Cable tension exceeding 180 kN causes permanent drum deformation, rotational speed exceeding 75 rpm induces centrifugal force &gt;2.5g leading to bearing seizure, temperature exceeding 120°C reduces steel yield strength below 250 MPa**, Mechanism: **Plastic deformation occurs when applied stress exceeds material yield strength (σ_y = 355 MPa for S355 structural steel), governed by Hooke's Law (σ = Eε) and Tresca yield criterion; bearing failure follows Hertzian contact stress theory with maximum shear stress τ_max = 0.3p_0 exceeding material fatigue limit**.

### 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 |
| :--- | :--- | :--- | :--- |
| Cable misalignment angle exceeding 3° during spooling | 8 | Concentrated stress concentration at drum flange interface (K_t = 2.8) | Install helical groove guide system with 0.5 mm precision laser alignment sensors |
| Corrosion pitting depth exceeding 0.8 mm in marine environments | 8 | Stress corrosion cracking initiating at pit root (da/dt = 1.2×10^-8 m/s in 3.5% NaCl) | Apply 300 μm zinc-nickel electroplating coating with 100 μm epoxy topcoat |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Cable Tension Control System**, **Cable Spooling Mechanism**, **Industrial Braking System**  
**Downstream Applications**: Marine Mooring Systems, Offshore Anchor Handling Equipment, Construction Hoisting Machinery  

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

### Q: What materials are available for drum assemblies in constant tension winches?
**A**: Our drum assemblies are manufactured from high-grade carbon steel, corrosion-resistant stainless steel, or lightweight aluminum alloy to meet various industrial requirements.

### Q: What components are included in a complete drum assembly BOM?
**A**: A complete bill of materials includes bearings, drum cylinder, end flanges, mounting brackets, and shaft for proper installation and operation.

### Q: How does the drum assembly function in machinery equipment?
**A**: The rotating cylindrical drum stores and releases cable or rope under constant tension, ensuring smooth operation in winching and lifting applications.

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

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

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

> **Reference ID**: DRUM_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d9500fa0
