---
title: "Eccentric Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ECCENTRIC_ASSEMBLY"
  data_integrity_hash: "85b7306787a10fbf53e631dde81a82fd"
  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:ECCENTRIC_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/eccentric-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/eccentric-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-0.5 mm eccentric throw at 300-1200 rpm, generating 50-250 kN crushing force"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.8
    unit: "mm"
    consequence: "Hertzian contact stress exceeding 800 MPa at eccentric bushing-shaft interface causes adhesive wear and fatigue spalling"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Insufficient lubrication film thickness &lt;5 μm at eccentric bushing interface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.3 MPa pressure and 40 μm filtration"
  - node_2:
      trigger: "Cyclic bending stress exceeding 350 MPa at main shaft fillet radius"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Shaft design with 5 mm minimum fillet radius and shot peening to induce 400 MPa compressive residual stress"
bom_nodes:
  eccentric-bushing:
    type: "component"
    urn: "URN:CNFX:ME:ECCENTRIC_BUSHING"
    interface_type: "physical-logic-coupled"
  main-shaft:
    type: "component"
    urn: "URN:CNFX:ME:MAIN_SHAFT"
    interface_type: "physical-logic-coupled"
  eccentric-sleeve:
    type: "component"
    urn: "URN:CNFX:ME:ECCENTRIC_SLEEVE"
    interface_type: "physical-logic-coupled"
  thrust-bearing:
    type: "part"
    urn: "URN:CNFX:ME:THRUST_BEARING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (LIMITS AND FITS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.2-1978 (PREFERRED METRIC LIMITS AND FITS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/eccentric-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "caa112794c443f72570d0e5a71b06b6a7ee1c838052a202254cd6a0344b0a220"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Eccentric Assembly

## 1. Technical Definition
The rotating mechanism that generates the crushing motion in a cone crusher

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-0.5 mm eccentric throw at 300-1200 rpm, generating 50-250 kN crushing force**. Failure boundary: **Eccentric bushing wear exceeding 0.8 mm clearance or main shaft deflection &gt;0.15 mm at 100 kN load**, Mechanism: **Hertzian contact stress exceeding 800 MPa at eccentric bushing-shaft interface causes adhesive wear and fatigue spalling**.

### 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 |
| :--- | :--- | :--- | :--- |
| Insufficient lubrication film thickness &lt;5 μm at eccentric bushing interface | 8 | Boundary lubrication leading to adhesive wear and seizure | Forced lubrication system with 0.3 MPa pressure and 40 μm filtration |
| Cyclic bending stress exceeding 350 MPa at main shaft fillet radius | 8 | Fatigue crack initiation at stress concentration points | Shaft design with 5 mm minimum fillet radius and shot peening to induce 400 MPa compressive residual stress |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Lubrication System**, **Vibration Monitoring System**  
**Downstream Applications**: Crushed Stone Aggregate, Mineral Ore Concentrate, Recycled Concrete Aggregate  

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

### Q: What is the primary function of an eccentric assembly in cone crushers?
**A**: The eccentric assembly generates the gyrating crushing motion in cone crushers by rotating eccentrically around the main shaft, creating the compressive force needed to crush materials.

### Q: Why is alloy steel used for eccentric assembly components?
**A**: Alloy steel provides exceptional strength, wear resistance, and durability to withstand the high stress, abrasion, and impact forces experienced during crushing operations.

### Q: How often should eccentric assembly components be inspected or replaced?
**A**: Regular inspection should occur during routine maintenance (typically every 500-1000 operating hours), with replacement needed when wear exceeds manufacturer specifications or performance declines.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (LIMITS AND FITS)
- ANSI B4.2-1978 (PREFERRED METRIC LIMITS AND FITS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Eccentric Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/eccentric-assembly)**

### 🌐 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**: ECCENTRIC_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9f7744d5
