---
title: "Sheave"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SHEAVE"
  data_integrity_hash: "b091fad6829eb27b7d1e25ce0c1958ab"
  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:SHEAVE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sheave.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/sheave"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-200 kN dynamic load, 0-15 m/s line speed, -40°C to 120°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 6
    unit: "mm"
    consequence: "Abrasive wear from wire rope contact following Archard's wear equation (K=1.5×10⁻⁷), fatigue crack propagation from cyclic bending stresses exceeding 350 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.5° between sheave and wire rope path"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser-aligned mounting system with 0.1° precision and real-time monitoring"
  - node_2:
      trigger: "Insufficient lubrication causing coefficient of friction &gt;0.15 at bearing interface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Automatic grease injection system triggered at 0.12 friction coefficient"
bom_nodes:
  sheave-wheel:
    type: "component"
    urn: "URN:CNFX:ME:SHEAVE_WHEEL"
    interface_type: "physical-logic-coupled"
  bearing-assembly:
    type: "part"
    urn: "URN:CNFX:ME:BEARING_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  grease-seals:
    type: "component"
    urn: "URN:CNFX:ME:GREASE_SEALS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 4183:1995 - BELT DRIVES - CLASSICAL AND NARROW V-BELTS - GROOVED PULLEYS (SYSTEM BASED ON DATUM WIDTH)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sheave.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "a6bfc1d4008760cd488e4ff670ba80fe57a9dd82b575b66b1b59bb45ca81eb9d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Sheave

## 1. Technical Definition
A grooved wheel used in crown blocks to guide and support the drilling line.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-200 kN dynamic load, 0-15 m/s line speed, -40°C to 120°C ambient temperature**. Failure boundary: **Groove wear depth exceeding 6 mm, surface hardness dropping below 55 HRC, bearing temperature exceeding 150°C**, Mechanism: **Abrasive wear from wire rope contact following Archard's wear equation (K=1.5×10⁻⁷), fatigue crack propagation from cyclic bending stresses exceeding 350 MPa**.

### 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 0.5° between sheave and wire rope path | 8 | Accelerated asymmetric groove wear causing wire rope derailment | Laser-aligned mounting system with 0.1° precision and real-time monitoring |
| Insufficient lubrication causing coefficient of friction &gt;0.15 at bearing interface | 8 | Seizure of sheave rotation leading to wire rope abrasion and tensile overload | Automatic grease injection system triggered at 0.12 friction coefficient |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Bearing Assembly](https://cnfx.com/llms/industry/furniture-manufacturing/product/bearing-assembly.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Crown Block Assembly**, **Drilling Line**, **Wire Rope Tensioning System**  
**Downstream Applications**: Oil Wells, Natural Gas Wells, Geothermal Wells  

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

### Q: What materials are used in this sheave construction?
**A**: This sheave is constructed from high-grade alloy steel, providing superior strength and durability for demanding machinery and equipment manufacturing applications.

### Q: How does the bearing assembly affect sheave performance?
**A**: The precision bearing assembly ensures smooth rotation under heavy loads, reduces friction, and extends service life when properly maintained with the integrated grease seals.

### Q: What applications is this sheave designed for?
**A**: This grooved wheel sheave is specifically engineered for use in crown blocks to guide and support drilling lines in industrial machinery, drilling rigs, and heavy equipment systems.

## 6. Manufacturing Compliance
- ISO 4183:1995 - BELT DRIVES - CLASSICAL AND NARROW V-BELTS - GROOVED PULLEYS (SYSTEM BASED ON DATUM WIDTH)

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SHEAVE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: cccaac97
