---
title: "Sheave Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SHEAVE_ASSEMBLY"
  data_integrity_hash: "7c6d375fe8f2f28733dbe2bc1ed2870f"
  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_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sheave-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/sheave-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kN dynamic load, 0-1000 rpm rotational speed, -40°C to 120°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.2
    unit: "mm"
    consequence: "Hertzian contact stress exceeding material yield strength (σ_y = 450 MPa for forged steel) causes plastic deformation; abrasive wear coefficient (K_ab = 2.5×10^-7 mm³/N·m) governs material removal; thermal expansion mismatch (Δα = 11×10^-6 K^-1) between steel and bronze bushings"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.15° between sheave axis and cable direction"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser-aligned mounting fixtures with 0.02° tolerance, real-time optical alignment monitoring"
  - node_2:
      trigger: "Lubricant film thickness reduction below 0.8 μm (Stribeck curve boundary lubrication regime)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.2 MPa minimum pressure, viscosity monitoring at 40°C (ISO VG 320)"
bom_nodes:
  sheave-wheel:
    type: "part"
    urn: "URN:CNFX:ME:SHEAVE_WHEEL"
    interface_type: "physical-logic-coupled"
  sheave-shaft:
    type: "component"
    urn: "URN:CNFX:ME:SHEAVE_SHAFT"
    interface_type: "physical-logic-coupled"
  bearing-assembly:
    type: "part"
    urn: "URN:CNFX:ME:BEARING_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  mounting-framebracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FRAMEBRACKET"
    interface_type: "physical-logic-coupled"
  grease-fitting:
    type: "component"
    urn: "URN:CNFX:ME:GREASE_FITTING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 4183:1995 - BELT DRIVES - CLASSICAL AND NARROW V-BELTS - GROOVED PULLEYS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sheave-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3a5cf2a1409022692ded8b4f57a8ba7d6536b500cf1473fbb8832f6871c44f13"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Sheave Assembly

## 1. Technical Definition
A mechanical assembly consisting of one or more sheaves (pulleys) mounted on a common shaft or frame, designed to guide and support cables or ropes in lifting and hoisting systems.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kN dynamic load, 0-1000 rpm rotational speed, -40°C to 120°C ambient temperature**. Failure boundary: **Sheave groove wear depth exceeding 3.2 mm (12.5% of original groove radius), bearing temperature exceeding 150°C, cable contact pressure exceeding 350 MPa**, Mechanism: **Hertzian contact stress exceeding material yield strength (σ_y = 450 MPa for forged steel) causes plastic deformation; abrasive wear coefficient (K_ab = 2.5×10^-7 mm³/N·m) governs material removal; thermal expansion mismatch (Δα = 11×10^-6 K^-1) between steel and bronze bushings**.

### 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 0.15° between sheave axis and cable direction | 8 | Accelerated asymmetric groove wear (2.8× normal rate), cable strand deformation | Laser-aligned mounting fixtures with 0.02° tolerance, real-time optical alignment monitoring |
| Lubricant film thickness reduction below 0.8 μm (Stribeck curve boundary lubrication regime) | 8 | Boundary lubrication metal-to-metal contact, bearing temperature rise at 15°C/min | Forced lubrication system with 0.2 MPa minimum pressure, viscosity monitoring at 40°C (ISO VG 320) |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wire Rope Tensioning System**, **Cable Lubrication System**, **Load Monitoring Device**  
**Downstream Applications**: Overhead Crane Systems, Elevator Hoisting Mechanisms, Marine Winch Assemblies  

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

### Q: What materials are used in your sheave assemblies?
**A**: Our sheave assemblies are manufactured from premium alloy steel or high-strength cast iron, selected for durability and load-bearing capacity in demanding industrial environments.

### Q: What maintenance does a sheave assembly require?
**A**: Regular lubrication through the grease fitting and periodic inspection of the bearing assembly and sheave wheel for wear are recommended to ensure optimal performance and longevity.

### Q: Can your sheave assemblies handle heavy lifting applications?
**A**: Yes, our assemblies are engineered for heavy-duty lifting and hoisting systems, with robust components like the mounting frame/bracket and sheave shaft designed to withstand significant loads.

## 6. Manufacturing Compliance
- ISO 4183:1995 - BELT DRIVES - CLASSICAL AND NARROW V-BELTS - GROOVED PULLEYS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Sheave Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/sheave-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**: SHEAVE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 7c213d39
