---
title: "Slewing Ring Bearing"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SLEWING_RING_BEARING"
  data_integrity_hash: "e4e74851f3344598e0b0bad14062a2d5"
  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:SLEWING_RING_BEARING"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/slewing-ring-bearing.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/slewing-ring-bearing"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Axial load: 50-5000 kN, Radial load: 20-2000 kN, Moment load: 10-1000 kN·m, Rotational speed: 0.1-30 rpm"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1800
    unit: "MPa"
    consequence: "Hertzian contact fatigue from cyclic loading exceeding material endurance limit (typically 1000-1200 MPa for bearing steel), Lubrication starvation leading to adhesive wear (metal-to-metal contact), Thermal expansion mismatch causing raceway distortion"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (particles &gt; 10 μm) into rolling contact zone"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triple-lip sealing with labyrinth design and positive pressure purge system"
  - node_2:
      trigger: "Misalignment exceeding 0.05° per meter of diameter"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Crowned roller profile with 15-25 μm crown height and self-aligning design"
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"
  cagespacer:
    type: "component"
    urn: "URN:CNFX:ME:CAGESPACER"
    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 7:2015 - SHAFT AND HOUSING FITS FOR METRIC RADIAL BALL AND ROLLER BEARINGS"
    scope: "Verified Engineering Specification"
  - standard: "DIN 5412-1:2016 - ROLLING BEARINGS - TAPERED ROLLER BEARINGS - BOUNDARY DIMENSIONS AND SERIES DESIGNATIONS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/slewing-ring-bearing.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "62928699588a74c77b922a79dc58fa35eca45b728bd765406e8f53dc985b7e10"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Slewing Ring Bearing

## 1. Technical Definition
A large-diameter bearing that supports axial, radial, and moment loads while enabling rotational movement between two structures.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Axial load: 50-5000 kN, Radial load: 20-2000 kN, Moment load: 10-1000 kN·m, Rotational speed: 0.1-30 rpm**. Failure boundary: **Contact stress exceeds 1800 MPa (Hertzian stress limit for hardened steel), Lubricant film thickness &lt; 0.1 μm (boundary lubrication threshold), Temperature &gt; 120°C (lubricant breakdown point)**, Mechanism: **Hertzian contact fatigue from cyclic loading exceeding material endurance limit (typically 1000-1200 MPa for bearing steel), Lubrication starvation leading to adhesive wear (metal-to-metal contact), Thermal expansion mismatch causing raceway distortion**.

### 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 |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (particles &gt; 10 μm) into rolling contact zone | 8 | Indentation fatigue and spalling on raceways | Triple-lip sealing with labyrinth design and positive pressure purge system |
| Misalignment exceeding 0.05° per meter of diameter | 8 | Edge loading and premature wear concentration | Crowned roller profile with 15-25 μm crown height and self-aligning design |

## 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**, **Induction Hardening Machine**, **Coordinate Measuring Machine**  
**Downstream Applications**: Wind Turbine Nacelles, Excavator Turntables, Radar Antenna Mounts  

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

### Q: What types of loads can slewing ring bearings handle?
**A**: Slewing ring bearings are designed to simultaneously support axial (thrust), radial, and moment (tilting) loads while enabling smooth rotational movement between connected structures.

### Q: What materials are used in slewing ring bearing construction?
**A**: These bearings are typically manufactured from high-strength alloy steel or specialized bearing steel for the rings, with rolling elements made from hardened steel, and may include cages/spacers and seals for protection.

### Q: What are the main components of a slewing ring bearing?
**A**: Key components include the inner ring, outer ring, rolling elements (balls or rollers), cage or spacer to maintain element spacing, and seals to prevent contamination and retain lubrication.

## 6. Manufacturing Compliance
- ISO 1132-1:2000 - ROLLING BEARINGS - TOLERANCES - PART 1: TERMS AND DEFINITIONS
- ANSI/ABMA 7:2015 - SHAFT AND HOUSING FITS FOR METRIC RADIAL BALL AND ROLLER BEARINGS
- DIN 5412-1:2016 - ROLLING BEARINGS - TAPERED ROLLER BEARINGS - BOUNDARY DIMENSIONS AND SERIES DESIGNATIONS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Slewing Ring Bearing](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/slewing-ring-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**: SLEWING_RING_BEARING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b64d5cb2
