---
title: "Swing Bearing"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SWING_BEARING"
  data_integrity_hash: "f51ad80bdd37f069bda8a3d946093e22"
  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:SWING_BEARING"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/swing-bearing.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/swing-bearing"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Axial load: 200-800 kN, Radial load: 50-200 kN, Rotational speed: 0.5-3 rpm, Temperature: -40°C to +80°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1500
    unit: "MPa"
    consequence: "Surface-initiated fatigue (pitting) due to Hertzian contact stress cycles exceeding material endurance limit, Lubrication starvation causing adhesive wear through boundary layer breakdown"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (particles &gt;15 μm) into bearing clearance"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triple-labyrinth seal with grease purge ports at 90° intervals"
  - node_2:
      trigger: "Uneven foundation settlement causing chassis distortion &gt;0.1°"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Spherical seat mounting with ±2° self-alignment capability"
bom_nodes:
  inner-ring:
    type: "component"
    urn: "URN:CNFX:ME:INNER_RING"
    interface_type: "physical-logic-coupled"
  outer-ring:
    type: "component"
    urn: "URN:CNFX:ME:OUTER_RING"
    interface_type: "physical-logic-coupled"
  rolling-elements:
    type: "component"
    urn: "URN:CNFX:ME:ROLLING_ELEMENTS"
    interface_type: "physical-logic-coupled"
  gear-teeth:
    type: "component"
    urn: "URN:CNFX:ME:GEAR_TEETH"
    interface_type: "physical-logic-coupled"
  seals:
    type: "component"
    urn: "URN:CNFX:ME:SEALS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1132-1:2000 ROLLING BEARINGS - TOLERANCES - PART 1: TERMS AND DEFINITIONS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ABMA 20-1996 RADIAL BEARINGS OF BALL, CYLINDRICAL ROLLER AND SPHERICAL ROLLER TYPES - METRIC DESIGN"
    scope: "Verified Engineering Specification"
  - standard: "DIN 620-1:2012 ROLLING BEARINGS - TOLERANCES - PART 1: TOLERANCES FOR RADIAL BEARINGS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/swing-bearing.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3401aa809b6603f9192e1fccf43da0d139494a9371d654ee6617cf2065d7ccdb"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Swing Bearing

## 1. Technical Definition
A large-diameter bearing that enables the upper structure of a crawler excavator to rotate relative to the undercarriage.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Axial load: 200-800 kN, Radial load: 50-200 kN, Rotational speed: 0.5-3 rpm, Temperature: -40°C to +80°C**. Failure boundary: **Contact stress exceeds 1500 MPa in raceways, Lubricant film thickness drops below 0.5 μm, Radial clearance exceeds 0.3 mm**, Mechanism: **Surface-initiated fatigue (pitting) due to Hertzian contact stress cycles exceeding material endurance limit, Lubrication starvation causing adhesive wear through boundary layer breakdown**.

### 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 |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (particles &gt;15 μm) into bearing clearance | 8 | Three-body abrasion creating micro-spalling on raceways | Triple-labyrinth seal with grease purge ports at 90° intervals |
| Uneven foundation settlement causing chassis distortion &gt;0.1° | 8 | Edge loading producing Brinell indentations on ball tracks | Spherical seat mounting with ±2° self-alignment capability |

## 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**: **Hydraulic Power Unit**, **Bearing Induction Heater**, **Torque Wrench Set**  
**Downstream Applications**: Crawler Excavator, Mining Shovel, Offshore Crane  

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

### Q: What is the primary function of a swing bearing in crawler excavators?
**A**: The swing bearing enables the upper structure (house) of a crawler excavator to rotate 360° relative to the undercarriage, allowing precise positioning of the boom and attachment during excavation operations.

### Q: What materials are used in manufacturing swing bearings for heavy machinery?
**A**: Swing bearings are typically constructed from high-carbon chromium bearing steel for the rolling elements and alloy steel for the inner/outer rings and gear teeth, providing exceptional strength, wear resistance, and durability under extreme loads.

### Q: How often should swing bearings be inspected and maintained?
**A**: Regular inspection every 250-500 operating hours is recommended, with thorough maintenance including lubrication, seal checks, and bolt torque verification every 1,000-2,000 hours to prevent premature failure and ensure optimal performance.

## 6. Manufacturing Compliance
- ISO 1132-1:2000 ROLLING BEARINGS - TOLERANCES - PART 1: TERMS AND DEFINITIONS
- ANSI/ABMA 20-1996 RADIAL BEARINGS OF BALL, CYLINDRICAL ROLLER AND SPHERICAL ROLLER TYPES - METRIC DESIGN
- DIN 620-1:2012 ROLLING BEARINGS - TOLERANCES - PART 1: TOLERANCES FOR RADIAL BEARINGS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Swing Bearing](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/swing-bearing)**

### 🌐 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**: SWING_BEARING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 49de00e7
