---
title: "Jib Foot Connection"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:JIB_FOOT_CONNECTION"
  data_integrity_hash: "f98c663abfe11a7744ba26f9ccb894f1"
  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_FOOT_CONNECTION"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/jib-foot-connection.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/jib-foot-connection"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-120 MPa compressive stress, -40°C to 80°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "High-cycle fatigue from cyclic bending moments during load swings, stress concentration at weld toe regions (Kt=3.2), fretting corrosion at bolted interfaces"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment-induced bending moment (5° angular deviation)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser-aligned mounting surfaces with 0.1mm flatness tolerance, tapered roller bearings with C/P ratio &gt; 2.5"
  - node_2:
      trigger: "Corrosion fatigue in marine environments (chloride concentration &gt; 500 mg/m²·day)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Duplex stainless steel (UNS S31803) construction with 22% Cr minimum, cathodic protection at -850 mV vs Ag/AgCl reference"
bom_nodes:
  connection-plates:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTION_PLATES"
    interface_type: "physical-logic-coupled"
  connection-pin:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTION_PIN"
    interface_type: "physical-logic-coupled"
  bushingbearing:
    type: "component"
    urn: "URN:CNFX:ME:BUSHINGBEARING"
    interface_type: "physical-logic-coupled"
  boltsnuts:
    type: "component"
    urn: "URN:CNFX:ME:BOLTSNUTS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/jib-foot-connection.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "0675e4c9b828f1a27729f0422f990e3f8d5309ccd99d6306ca2f823bc29e6cb2"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Jib Foot Connection

## 1. Technical Definition
Structural component that connects the jib (boom) to the crane's rotating platform or pedestal.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-120 MPa compressive stress, -40°C to 80°C operating temperature**. Failure boundary: **Yield strength exceedance at 250 MPa (ASTM A572 Grade 50 steel), fatigue crack initiation at 10⁶ cycles under 150 MPa alternating stress**, Mechanism: **High-cycle fatigue from cyclic bending moments during load swings, stress concentration at weld toe regions (Kt=3.2), fretting corrosion at bolted interfaces**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Misalignment-induced bending moment (5° angular deviation) | 8 | Premature bearing raceway spalling (ISO 15243:2017 mode 2) | Laser-aligned mounting surfaces with 0.1mm flatness tolerance, tapered roller bearings with C/P ratio &gt; 2.5 |
| Corrosion fatigue in marine environments (chloride concentration &gt; 500 mg/m²·day) | 8 | Stress corrosion cracking at HAZ regions (NACE MR0175/ISO 15156 violation) | Duplex stainless steel (UNS S31803) construction with 22% Cr minimum, cathodic protection at -850 mV vs Ag/AgCl reference |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Shot Blasting Equipment**  
**Downstream Applications**: Tower Cranes, Mobile Cranes, Offshore Cranes  

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

### Q: What materials are used in jib foot connections for maximum durability?
**A**: Jib foot connections are typically manufactured from high-strength steel or alloy steel to withstand extreme loads and harsh industrial environments, ensuring long-term structural integrity.

### Q: How does the jib foot connection affect crane stability and performance?
**A**: The jib foot connection securely links the boom to the rotating platform, distributing operational stresses evenly. Proper design minimizes deflection and maintains precise alignment for safe, efficient lifting.

### Q: What maintenance is required for jib foot connection components?
**A**: Regular inspection of bolts/nuts, bushings/bearings, and connection pins is essential. Lubricate bearings as specified, check for wear or corrosion, and replace components per manufacturer guidelines to prevent failure.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Jib Foot Connection](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/jib-foot-connection)**

### 🌐 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**: JIB_FOOT_CONNECTION | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 884b9ec4
