---
title: "Jib Tip Sheave Assembly"
industry: "Other Transport Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:JIB_TIP_SHEAVE_ASSEMBLY"
  data_integrity_hash: "768fb2fb633b09010420e150fee6b47e"
  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:JIB_TIP_SHEAVE_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/other-transport-equipment-manufacturing/product/jib-tip-sheave-assembly.md"
  official_resource_url: "https://cnfx.com/industry/other-transport-equipment-manufacturing/product/jib-tip-sheave-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kN rope tension, -40°C to +80°C ambient temperature, 0-100% relative humidity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.5
    unit: "mm"
    consequence: "Contact fatigue (Hertzian stress exceeding 1500 MPa) in bearing raceways, abrasive wear (Archard's wear coefficient K=5×10⁻⁷) from rope friction, stress corrosion cracking in high-humidity chloride environments"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment-induced cyclic bending moment exceeding 1200 N·m"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision laser alignment during installation with 0.1 mm tolerance, finite element analysis-optimized shaft geometry with 2.5 safety factor"
  - node_2:
      trigger: "Saltwater ingress exceeding 3% chloride concentration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Marine-grade 316L stainless steel construction with 25 µm electroless nickel plating, labyrinth seal design with IP67 rating"
bom_nodes:
  sheave-pulley:
    type: "part"
    urn: "URN:CNFX:ME:SHEAVE_PULLEY"
    interface_type: "physical-logic-coupled"
  sheave-pin-axle:
    type: "component"
    urn: "URN:CNFX:ME:SHEAVE_PIN_AXLE"
    interface_type: "physical-logic-coupled"
  side-plates-housing:
    type: "component"
    urn: "URN:CNFX:ME:SIDE_PLATES_HOUSING"
    interface_type: "physical-logic-coupled"
  bearings-bushings-or-roller-bearings:
    type: "component"
    urn: "URN:CNFX:ME:BEARINGS_BUSHINGS_OR_ROLLER_BEARINGS"
    interface_type: "physical-logic-coupled"
  lubrication-fitting:
    type: "component"
    urn: "URN:CNFX:ME:LUBRICATION_FITTING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 4301-1:2016 CRANES - CLASSIFICATION"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B30.5-2018 MOBILE AND LOCOMOTIVE CRANES"
    scope: "Verified Engineering Specification"
  - standard: "DIN 15020-1:1974 CRANES - PRINCIPLES RELATING TO ROPE DRIVES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/other-transport-equipment-manufacturing/product/jib-tip-sheave-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "423b99700dc0b3ede92c6fd5817378781673f4813b536e3de44ad547bc09fd13"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Jib Tip Sheave Assembly

## 1. Technical Definition
A pulley assembly mounted at the tip of a luffing jib for guiding and supporting hoist ropes or cables.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kN rope tension, -40°C to +80°C ambient temperature, 0-100% relative humidity**. Failure boundary: **Sheave bearing seizure at 0.5 mm radial play, rope groove wear depth exceeding 15% of rope diameter, structural crack initiation at 250 MPa stress intensity factor K₁c**, Mechanism: **Contact fatigue (Hertzian stress exceeding 1500 MPa) in bearing raceways, abrasive wear (Archard's wear coefficient K=5×10⁻⁷) from rope friction, stress corrosion cracking in high-humidity chloride environments**.

### 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-induced cyclic bending moment exceeding 1200 N·m | 8 | Sheave shaft fatigue fracture at fillet radius | Precision laser alignment during installation with 0.1 mm tolerance, finite element analysis-optimized shaft geometry with 2.5 safety factor |
| Saltwater ingress exceeding 3% chloride concentration | 8 | Corrosion pitting on sheave groove surface (ASTM G48 Method A) | Marine-grade 316L stainless steel construction with 25 µm electroless nickel plating, labyrinth seal design with IP67 rating |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Sheave (Pulley)](https://cnfx.com/llms/industry/other-transport-equipment-manufacturing/product/sheave-pulley.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wire Rope Tensioning System**, **Crane Control Console**, **Load Monitoring System**  
**Downstream Applications**: Tower Cranes, Mobile Cranes, Shipyard Gantry Cranes  

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

### Q: What materials are used in this jib tip sheave assembly?
**A**: This assembly is constructed from durable alloy steel and high-strength cast steel components for maximum load capacity and longevity in demanding industrial applications.

### Q: How does the jib tip sheave assembly function in transport equipment?
**A**: Mounted at the tip of a luffing jib, it guides and supports hoist ropes or cables, ensuring smooth cable movement and proper load distribution during lifting operations.

### Q: What maintenance does this sheave assembly require?
**A**: Regular lubrication via the integrated fitting and inspection of bearings, sheave pin, and side plates are essential to maintain optimal performance and prevent premature wear.

## 6. Manufacturing Compliance
- ISO 4301-1:2016 CRANES - CLASSIFICATION
- ANSI/ASME B30.5-2018 MOBILE AND LOCOMOTIVE CRANES
- DIN 15020-1:1974 CRANES - PRINCIPLES RELATING TO ROPE DRIVES

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Jib Tip Sheave Assembly](https://cnfx.com/industry/other-transport-equipment-manufacturing/product/jib-tip-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**: JIB_TIP_SHEAVE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 2eb1b268
