---
title: "Sheaves / Pulleys"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SHEAVES_PULLEYS"
  data_integrity_hash: "fcb46ad9788b4e08411dfe553c0e97ea"
  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:SHEAVES_PULLEYS"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sheaves-pulleys.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/sheaves-pulleys"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kN dynamic load, 0-3000 rpm rotational speed, -40°C to 120°C temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "°C"
    consequence: "Abrasive wear from cable friction (Archard's wear equation), fatigue crack propagation from cyclic bending stresses (Paris' law), plastic deformation from overload exceeding yield strength (Hooke's law)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.5° angular deviation"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser-aligned mounting with 0.1° tolerance and real-time alignment monitoring"
  - node_2:
      trigger: "Lubrication film breakdown at boundary layer (λ &lt; 1)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system maintaining 2.5 μm oil film thickness with viscosity monitoring"
bom_nodes:
  groove:
    type: "component"
    urn: "URN:CNFX:ME:GROOVE"
    interface_type: "physical-logic-coupled"
  hub:
    type: "part"
    urn: "URN:CNFX:ME:HUB"
    interface_type: "physical-logic-coupled"
  bearingbushing:
    type: "component"
    urn: "URN:CNFX:ME:BEARINGBUSHING"
    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/sheaves-pulleys.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "53023ffa17229767aba250414493b28f68fc7ac0da53e1a6e3b83f6e55477572"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Sheaves / Pulleys

## 1. Technical Definition
Grooved wheels used to guide and support cables, ropes, or belts in hoisting systems.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kN dynamic load, 0-3000 rpm rotational speed, -40°C to 120°C temperature**. Failure boundary: **Groove wear depth exceeding 15% of cable diameter, bearing temperature exceeding 150°C, surface hardness dropping below 45 HRC**, Mechanism: **Abrasive wear from cable friction (Archard's wear equation), fatigue crack propagation from cyclic bending stresses (Paris' law), plastic deformation from overload exceeding yield strength (Hooke's law)**.

### 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° angular deviation | 8 | Accelerated asymmetric groove wear and cable derailment | Laser-aligned mounting with 0.1° tolerance and real-time alignment monitoring |
| Lubrication film breakdown at boundary layer (λ &lt; 1) | 8 | Metal-to-metal contact causing adhesive wear and seizure | Forced lubrication system maintaining 2.5 μm oil film thickness with viscosity monitoring |

## 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**, **Belt Conveyor Drive Unit**, **Cable Lubrication System**  
**Downstream Applications**: Construction Hoists, Mining Elevators, Marine Winches  

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

### Q: What materials are best for sheaves in corrosive environments?
**A**: Polymer composite sheaves offer excellent corrosion resistance and are ideal for marine, chemical, or outdoor applications where moisture and chemicals are present.

### Q: How do I choose between cast iron and steel sheaves?
**A**: Cast iron provides good wear resistance and vibration damping at lower cost, while steel offers higher strength and durability for heavy-duty applications with extreme loads.

### Q: What maintenance do sheave bearings require?
**A**: Regular lubrication and inspection for wear are essential. Sealed bearings reduce maintenance, while bushings may require more frequent lubrication depending on load and operating conditions.

## 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: Sheaves / Pulleys](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/sheaves-pulleys)**

### 🌐 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**: SHEAVES_PULLEYS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9a5baef0
