---
title: "Drum or Sheave"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DRUM_OR_SHEAVE"
  data_integrity_hash: "4119bd3199fe6b6bf59589ec42245ba5"
  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_OR_SHEAVE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drum-or-sheave.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drum-or-sheave"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kN rope tension, 0-100 rpm rotational speed, 0-60°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 steel), rope detachment results from centrifugal force exceeding rope-drum friction coefficient (μ = 0.15), thermal softening follows Arrhenius-type temperature dependence"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Rope misalignment exceeding 3° from drum groove centerline"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install laser-guided rope alignment system with 0.1° angular resolution"
  - node_2:
      trigger: "Corrosive environment with chloride concentration &gt; 500 ppm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Apply hot-dip galvanizing with 85 μm zinc coating thickness"
bom_nodes:
  groove:
    type: "component"
    urn: "URN:CNFX:ME:GROOVE"
    interface_type: "physical-logic-coupled"
  flange:
    type: "component"
    urn: "URN:CNFX:ME:FLANGE"
    interface_type: "physical-logic-coupled"
  hub:
    type: "part"
    urn: "URN:CNFX:ME:HUB"
    interface_type: "physical-logic-coupled"
  bearing-surface:
    type: "component"
    urn: "URN:CNFX:ME:BEARING_SURFACE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 2408:2017 (STEEL WIRE ROPES FOR GENERAL PURPOSES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drum-or-sheave.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "540bcf9679771a2e7c06db257989cc4ecc54d663a2d1abdb2cb7b3c39d927998"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Drum or Sheave

## 1. Technical Definition
A cylindrical component in a hoist unit that winds or guides the lifting rope/cable.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kN rope tension, 0-100 rpm rotational speed, 0-60°C ambient temperature**. Failure boundary: **Rope tension exceeding 180 kN causes permanent deformation, rotational speed exceeding 120 rpm induces centrifugal rope detachment, temperature exceeding 80°C reduces yield strength by 30%**, Mechanism: **Plastic deformation occurs when applied stress exceeds material yield strength (σ_y = 355 MPa for S355 steel), rope detachment results from centrifugal force exceeding rope-drum friction coefficient (μ = 0.15), thermal softening follows Arrhenius-type temperature dependence**.

### 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 |
| :--- | :--- | :--- | :--- |
| Rope misalignment exceeding 3° from drum groove centerline | 8 | Accelerated groove wear rate exceeding 0.5 mm/1000 cycles | Install laser-guided rope alignment system with 0.1° angular resolution |
| Corrosive environment with chloride concentration &gt; 500 ppm | 8 | Pitting corrosion depth &gt; 2 mm within 6 months | Apply hot-dip galvanizing with 85 μm zinc coating thickness |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wire Rope Tensioning System**, **Lubrication System**, **Load Monitoring Device**  
**Downstream Applications**: Overhead Cranes, Construction Hoists, Mining Winches  

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

### Q: What materials are best for heavy-duty hoist drums or sheaves?
**A**: Cast steel offers excellent durability for standard loads, forged steel provides superior strength for heavy-duty applications, and ductile iron balances strength with cost-effectiveness for moderate use.

### Q: How does the groove design affect rope or cable performance?
**A**: Properly machined grooves reduce wear on ropes/cables by providing consistent contact surfaces, preventing slippage and extending both component lifespans in hoisting operations.

### Q: What maintenance is required for drum or sheave bearing surfaces?
**A**: Regular lubrication and inspection for scoring or wear are essential. Bearing surfaces should be kept clean and free of debris to ensure smooth rotation and prevent premature failure in machinery.

## 6. Manufacturing Compliance
- ISO 2408:2017 (STEEL WIRE ROPES FOR GENERAL PURPOSES)

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

### 🌐 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**: DRUM_OR_SHEAVE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 526afc59
