---
title: "Precision Bearings"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PRECISION_BEARINGS"
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source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PRECISION_BEARINGS"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/precision-bearings.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/precision-bearings"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-15000 rpm rotational speed, -40°C to 150°C temperature, 0.1-100 kN radial load, 0.01-10 kN axial load"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.2
    unit: "GPa"
    consequence: "Hertzian contact fatigue from cyclic loading exceeding material endurance limit (1.1 GPa for AISI 52100 steel), lubricant starvation leading to adhesive wear (Archard wear coefficient &gt;1×10⁻⁴ mm³/N·m), thermal expansion mismatch causing brinelling (differential expansion coefficient &gt;2×10⁻⁶/°C)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (particle size &gt;5 μm) exceeding ISO 4406 cleanliness code 16/14/11"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral labyrinth seals with 0.05 mm clearance and positive pressure purge system at 0.2 bar above ambient"
  - node_2:
      trigger: "Misalignment exceeding 0.001 rad (angular) or 0.1 mm (parallel) per 100 mm shaft length"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Self-aligning spherical roller design with ±2° angular compliance and crowned roller profiles (logarithmic profile with 0.0005 mm/mm crowning)"
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"
  cage:
    type: "component"
    urn: "URN:CNFX:ME:CAGE"
    interface_type: "physical-logic-coupled"
  sealsshields:
    type: "component"
    urn: "URN:CNFX:ME:SEALSSHIELDS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 492:2014 (ROLLING BEARINGS - RADIAL BEARINGS - TOLERANCES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/precision-bearings.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
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  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Precision Bearings

## 1. Technical Definition
High-accuracy rolling elements designed to support radial and axial loads with minimal friction in rotating machinery.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-15000 rpm rotational speed, -40°C to 150°C temperature, 0.1-100 kN radial load, 0.01-10 kN axial load**. Failure boundary: **Contact stress exceeds 4.2 GPa (Hertzian stress limit for bearing steel), lubricant film thickness drops below 0.1 μm (boundary lubrication threshold), temperature surpasses 200°C (tempering temperature of bearing steel)**, Mechanism: **Hertzian contact fatigue from cyclic loading exceeding material endurance limit (1.1 GPa for AISI 52100 steel), lubricant starvation leading to adhesive wear (Archard wear coefficient &gt;1×10⁻⁴ mm³/N·m), thermal expansion mismatch causing brinelling (differential expansion coefficient &gt;2×10⁻⁶/°C)**.

### 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 (particle size &gt;5 μm) exceeding ISO 4406 cleanliness code 16/14/11 | 8 | Three-body abrasive wear increasing surface roughness Ra &gt;0.4 μm | Integral labyrinth seals with 0.05 mm clearance and positive pressure purge system at 0.2 bar above ambient |
| Misalignment exceeding 0.001 rad (angular) or 0.1 mm (parallel) per 100 mm shaft length | 8 | Edge loading creating localized stress concentration factor Kt &gt;3 | Self-aligning spherical roller design with ±2° angular compliance and crowned roller profiles (logarithmic profile with 0.0005 mm/mm crowning) |

## 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 Grinding Machine**, **Heat Treatment Furnace**, **Surface Finish Inspection System**  
**Downstream Applications**: Industrial Gearboxes, Electric Motors, Machine Tool Spindles  

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

### Q: What are the main advantages of using ceramic silicon nitride in precision bearings?
**A**: Ceramic silicon nitride bearings offer superior corrosion resistance, can operate at higher temperatures than steel bearings, provide electrical insulation, and have lower density for reduced centrifugal forces at high speeds.

### Q: How do precision bearings differ from standard bearings in machinery applications?
**A**: Precision bearings have tighter tolerances, superior surface finishes, and more consistent geometry for reduced vibration and noise, enabling higher rotational accuracy and longer service life in demanding machinery applications.

### Q: What maintenance considerations are important for precision bearing longevity?
**A**: Proper lubrication with compatible greases, contamination prevention through effective seals/shields, correct mounting to avoid brinelling, and regular vibration monitoring are crucial for maximizing precision bearing service life.

## 6. Manufacturing Compliance
- ISO 492:2014 (ROLLING BEARINGS - RADIAL BEARINGS - TOLERANCES)

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

### 🌐 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**: PRECISION_BEARINGS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 1666ee36
