---
title: "Slewing Bearing (Ring)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SLEWING_BEARING_RING"
  data_integrity_hash: "d3ca4dc403c0dd4122a85e4a67c5fe69"
  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_BEARING_RING"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/slewing-bearing-ring.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/slewing-bearing-ring"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Contact stress 1500-2500 MPa, rotational speed 0.1-30 rpm, axial load 50-5000 kN, radial load 20-2000 kN"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3000
    unit: "MPa"
    consequence: "Subsurface shear stress exceeding material yield strength (τ_max &gt; 0.3σ_y) initiates fatigue cracks at 45° to surface following Lundberg-Palmgren theory"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant particle &gt;15 μm diameter entering raceway"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triple-labyrinth seal with 0.05 mm clearance and positive pressure grease purge at 0.2 bar"
  - node_2:
      trigger: "Misalignment exceeding 0.001 rad causing edge loading"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Spherical seat mounting with 0.5° angular compensation and laser-aligned installation to 0.0005 rad tolerance"
bom_nodes:
  raceway:
    type: "component"
    urn: "URN:CNFX:ME:RACEWAY"
    interface_type: "physical-logic-coupled"
  mounting-holes:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_HOLES"
    interface_type: "physical-logic-coupled"
  sealing-groove:
    type: "component"
    urn: "URN:CNFX:ME:SEALING_GROOVE"
    interface_type: "physical-logic-coupled"
  gear-teeth-if-applicable:
    type: "component"
    urn: "URN:CNFX:ME:GEAR_TEETH_IF_APPLICABLE"
    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 7-1995 - SHAFT AND HOUSING FITS FOR METRIC RADIAL BALL AND ROLLER BEARINGS (EXCEPT TAPERED ROLLER BEARINGS) CONFORMING TO BASIC BOUNDARY PLANS"
    scope: "Verified Engineering Specification"
  - standard: "DIN 5412-1:2016-12 - ROLLING BEARINGS - SLEWING BEARINGS - PART 1: GENERAL PRINCIPLES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/slewing-bearing-ring.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ea811c2309a2b663041804904b52159159cc98e6857e8c26611060c136d97402"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Slewing Bearing (Ring)

## 1. Technical Definition
The stationary or rotating ring component of a slewing bearing that provides the raceway for rolling elements.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Contact stress 1500-2500 MPa, rotational speed 0.1-30 rpm, axial load 50-5000 kN, radial load 20-2000 kN**. Failure boundary: **Hertzian contact stress exceeding 3000 MPa causes plastic deformation, Brinell hardness drop below 300 HB initiates spalling**, Mechanism: **Subsurface shear stress exceeding material yield strength (τ_max &gt; 0.3σ_y) initiates fatigue cracks at 45° to surface following Lundberg-Palmgren theory**.

### 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 particle &gt;15 μm diameter entering raceway | 8 | Indentation-induced stress concentration exceeding 2.5× nominal contact stress | Triple-labyrinth seal with 0.05 mm clearance and positive pressure grease purge at 0.2 bar |
| Misalignment exceeding 0.001 rad causing edge loading | 8 | Stress concentration factor of 3.2 at raceway edge, localized temperature rise to 150°C | Spherical seat mounting with 0.5° angular compensation and laser-aligned installation to 0.0005 rad tolerance |

## 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 Turning Center**, **Gear Hobbing Machine**, **Induction Hardening Machine**  
**Downstream Applications**: Wind Turbine Yaw Systems, Excavator Swing Mechanisms, Medical CT Scanner Gantries  

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

### Q: What materials are commonly used for slewing bearing rings?
**A**: Slewing bearing rings are typically manufactured from high-strength alloy steels such as 42CrMo4 or 50Mn, which provide excellent durability and load-bearing capacity for industrial applications.

### Q: What are the key components of a slewing bearing ring?
**A**: Key components include the raceway for rolling elements, mounting holes for secure installation, sealing grooves for protection, and optional gear teeth for rotational drive systems in machinery.

### Q: How do I select the right slewing bearing ring for my equipment?
**A**: Consider load capacity requirements, rotational speed, environmental conditions, and whether you need integrated gear teeth. Consult specifications for materials like 42CrMo4 or 50Mn steel based on your application's demands.

## 6. Manufacturing Compliance
- ISO 1132-1:2000 - ROLLING BEARINGS - TOLERANCES - PART 1: TERMS AND DEFINITIONS
- ANSI/ABMA 7-1995 - SHAFT AND HOUSING FITS FOR METRIC RADIAL BALL AND ROLLER BEARINGS (EXCEPT TAPERED ROLLER BEARINGS) CONFORMING TO BASIC BOUNDARY PLANS
- DIN 5412-1:2016-12 - ROLLING BEARINGS - SLEWING BEARINGS - PART 1: GENERAL PRINCIPLES

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

### 🌐 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**: SLEWING_BEARING_RING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d5df7cfb
