---
title: "Pivot Housing"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PIVOT_HOUSING"
  data_integrity_hash: "4977dc72593e6a49fd8a3fa92dabef23"
  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:PIVOT_HOUSING"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pivot-housing.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pivot-housing"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 kNÂ·m torque, -40Â°C to 120Â°C temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 180
    unit: "kNÂ"
    consequence: "Plastic deformation due to torsional stress exceeding ASTM A36 steel yield strength of 250 MPa, or thermal expansion coefficient mismatch (steel Î±=11.5Ã—10â»â¶/Â°C vs bearing Î±=23Ã—10â»â¶/Â°C) causing binding"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosive environment with chloride concentration exceeding 500 ppm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "316L stainless steel construction with post-weld heat treatment at 1050Â°C for 2 hours"
  - node_2:
      trigger: "Cyclic loading at 5-15 Hz frequency matching natural frequency of 12 Hz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Damping ratio increased to 0.15 through constrained layer viscoelastic inserts"
bom_nodes:
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B4.1-1967 (R2019) (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 7184-1:2018 (TOLERANCES FOR BEARINGS - PART 1: GENERAL PRINCIPLES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pivot-housing.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "fdd2055ee9b72e3c3ab9ab5cfefc3b054a803bc5473bcd8d8e43fb606fd078f3"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Pivot Housing

## 1. Technical Definition
A structural component that houses and supports the pivot mechanism within the Boom Base Section.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 kNÂ·m torque, -40Â°C to 120Â°C temperature**. Failure boundary: **Material yield strength exceeded at 180 kNÂ·m torque or 150Â°C thermal expansion exceeding 0.5 mm clearance**, Mechanism: **Plastic deformation due to torsional stress exceeding ASTM A36 steel yield strength of 250 MPa, or thermal expansion coefficient mismatch (steel Î±=11.5Ã—10â»â¶/Â°C vs bearing Î±=23Ã—10â»â¶/Â°C) causing binding**.

### 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 |
| :--- | :--- | :--- | :--- |
| Corrosive environment with chloride concentration exceeding 500 ppm | 8 | Stress corrosion cracking initiating at weld seams | 316L stainless steel construction with post-weld heat treatment at 1050Â°C for 2 hours |
| Cyclic loading at 5-15 Hz frequency matching natural frequency of 12 Hz | 8 | Resonance-induced fatigue fracture at stress concentration points | Damping ratio increased to 0.15 through constrained layer viscoelastic inserts |

## 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**, **Industrial Shot Blasting Machine**  
**Downstream Applications**: Excavator Boom Assembly, Crane Boom Assembly, Aerial Work Platform Boom Assembly  

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

### Q: What is the primary function of a pivot housing in machinery?
**A**: The pivot housing serves as a structural component that securely houses and supports the pivot mechanism within the Boom Base Section, enabling controlled rotational movement while maintaining stability under heavy loads.

### Q: Why is cast steel used for pivot housing construction?
**A**: Cast steel provides exceptional strength, durability, and impact resistance required for heavy machinery applications. It withstands continuous stress, vibration, and environmental factors while maintaining dimensional stability.

### Q: How does the mounting flange integrate with the pivot housing?
**A**: The mounting flange is a critical component of the pivot housing assembly that provides secure attachment points for connecting to other structural elements, ensuring proper alignment and load distribution throughout the machinery system.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)
- ANSI/ASME B4.1-1967 (R2019) (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)
- DIN 7184-1:2018 (TOLERANCES FOR BEARINGS - PART 1: GENERAL PRINCIPLES)

---
### ðŸ› ï¸ Engineering Resource Access
ðŸ”— **[Full Specification: Pivot Housing](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pivot-housing)**

### ðŸŒ Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **1** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PIVOT_HOUSING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: e27abb31
