---
title: "Spherical Roller Bearings"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SPHERICAL_ROLLER_BEARINGS"
  data_integrity_hash: "6495c8d6de1fadbc7d3d7dcacb04ba7c"
  source_authority: "https://cnfx.com"
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source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:SPHERICAL_ROLLER_BEARINGS"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/spherical-roller-bearings.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/spherical-roller-bearings"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Radial load capacity: 50-500 kN, Speed limit: 3000-15000 rpm, Temperature range: -30°C to +120°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.2
    unit: "GPa"
    consequence: "Hertzian contact fatigue from cyclic subsurface shear stresses exceeding material endurance limit (approximately 1.8 GPa for bearing steel), Cage instability due to centrifugal forces exceeding cage pocket retention force, Boundary lubrication regime transition when Λ ratio (film thickness/surface roughness) &lt; 1"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.5° angular deviation from shaft axis"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated spherical outer ring design with self-aligning capability up to ±2°, Precision ground raceways with controlled crowning profile"
  - node_2:
      trigger: "Contaminant ingress (hard particles &gt; 15 μm) into lubricant"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triple-lip contact seals with 0.05 mm radial interference, Labyrinth grease retention systems, Forced lubrication filtration to ISO 4406 16/14/11 cleanliness"
bom_nodes:
  inner-ring:
    type: "component"
    urn: "URN:CNFX:ME:INNER_RING"
    interface_type: "physical-logic-coupled"
  outer-ring:
    type: "part"
    urn: "URN:CNFX:ME:OUTER_RING"
    interface_type: "physical-logic-coupled"
  spherical-rollers:
    type: "component"
    urn: "URN:CNFX:ME:SPHERICAL_ROLLERS"
    interface_type: "physical-logic-coupled"
  cage-retainer:
    type: "component"
    urn: "URN:CNFX:ME:CAGE_RETAINER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 15:2011 (DIMENSIONAL TOLERANCES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ABMA 11:2014 (LOAD RATINGS AND FATIGUE LIFE)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 620-2:1995 (BOUNDARY DIMENSIONS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/spherical-roller-bearings.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "fc058a650cd71bbb4c086ed236b2122c741c511ae45eb7d27cdf9c23f96d86fd"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Spherical Roller Bearings

## 1. Technical Definition
A type of rolling-element bearing designed to accommodate misalignment and heavy radial loads.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Radial load capacity: 50-500 kN, Speed limit: 3000-15000 rpm, Temperature range: -30°C to +120°C**. Failure boundary: **Contact stress exceeds 4.2 GPa (Hertzian stress limit), Cage acceleration surpasses 1500 m/s², Lubricant film thickness drops below 0.1 μm**, Mechanism: **Hertzian contact fatigue from cyclic subsurface shear stresses exceeding material endurance limit (approximately 1.8 GPa for bearing steel), Cage instability due to centrifugal forces exceeding cage pocket retention force, Boundary lubrication regime transition when Λ ratio (film thickness/surface roughness) &lt; 1**.

### 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 |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.5° angular deviation from shaft axis | 8 | Edge loading causing localized contact stress concentration at roller ends | Integrated spherical outer ring design with self-aligning capability up to ±2°, Precision ground raceways with controlled crowning profile |
| Contaminant ingress (hard particles &gt; 15 μm) into lubricant | 8 | Indentation fatigue initiating surface-origin spalling at raceway contact zones | Triple-lip contact seals with 0.05 mm radial interference, Labyrinth grease retention systems, Forced lubrication filtration to ISO 4406 16/14/11 cleanliness |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Outer Ring](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/outer-ring.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Bearing Heater**, **Hydraulic Press**, **Industrial Lubrication System**  
**Downstream Applications**: Industrial Gearboxes, Heavy-Duty Conveyors, Mining Equipment  

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

### Q: What are the main advantages of spherical roller bearings in machinery manufacturing?
**A**: Spherical roller bearings are designed to accommodate shaft misalignment and handle heavy radial loads, making them ideal for industrial machinery where alignment precision varies and high load capacity is required.

### Q: What materials are commonly used in spherical roller bearing construction?
**A**: These bearings typically use high-carbon chromium bearing steel (like GCr15/52100) for optimal hardness and durability, and case-hardened steel (such as 8620) for components requiring toughness and wear resistance.

### Q: What are the key components in a spherical roller bearing assembly?
**A**: The main components include the inner ring, outer ring, spherical rollers, and cage (retainer). The spherical rollers allow for misalignment accommodation while the cage maintains proper roller spacing and alignment.

## 6. Manufacturing Compliance
- ISO 15:2011 (DIMENSIONAL TOLERANCES)
- ANSI/ABMA 11:2014 (LOAD RATINGS AND FATIGUE LIFE)
- DIN 620-2:1995 (BOUNDARY DIMENSIONS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Spherical Roller Bearings](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/spherical-roller-bearings)**

### 🌐 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**: SPHERICAL_ROLLER_BEARINGS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: ad110f8e
