---
title: "Eccentric Shaft"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ECCENTRIC_SHAFT"
  data_integrity_hash: "1013c9468e5e5d5edbe33f89c910088b"
  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_SHAFT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/eccentric-shaft.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/eccentric-shaft"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-1200 RPM at 50-200 kN eccentric force"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 7
    unit: "cycles"
    consequence: "High-cycle fatigue from cyclic bending stresses exceeding 0.45σ_yield due to offset mass rotation"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Inadequate lubrication causing boundary lubrication regime"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.15 MPa minimum pressure and 40°C temperature control"
  - node_2:
      trigger: "Material defect exceeding 0.5 mm inclusion size at stress concentration zones"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Ultrasonic testing at 5 MHz frequency with 0.2 mm defect detection threshold"
bom_nodes:
  eccentric-section:
    type: "component"
    urn: "URN:CNFX:ME:ECCENTRIC_SECTION"
    interface_type: "physical-logic-coupled"
  bearing-journals:
    type: "component"
    urn: "URN:CNFX:ME:BEARING_JOURNALS"
    interface_type: "physical-logic-coupled"
  pulleydrive-keyway:
    type: "component"
    urn: "URN:CNFX:ME:PULLEYDRIVE_KEYWAY"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/eccentric-shaft.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ce03f769094c2cbb33630b497326359ec11c5af39fc3230615d43e66cd995b9f"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Eccentric Shaft

## 1. Technical Definition
A rotating shaft with an offset center of mass that converts rotary motion into reciprocating motion in a jaw crusher.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-1200 RPM at 50-200 kN eccentric force**. Failure boundary: **Fatigue failure at 10^7 cycles with 350 MPa alternating stress amplitude**, Mechanism: **High-cycle fatigue from cyclic bending stresses exceeding 0.45σ_yield due to offset mass rotation**.

### 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 |
| :--- | :--- | :--- | :--- |
| Inadequate lubrication causing boundary lubrication regime | 8 | Adhesive wear at journal bearings exceeding 0.1 mm clearance | Forced lubrication system with 0.15 MPa minimum pressure and 40°C temperature control |
| Material defect exceeding 0.5 mm inclusion size at stress concentration zones | 8 | Crack initiation at fillet radii propagating beyond 2 mm depth | Ultrasonic testing at 5 MHz frequency with 0.2 mm defect detection threshold |

## 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**: **Jaw Crusher Frame Assembly**, **Hydraulic Power Unit**, **Vibration Monitoring System**  
**Downstream Applications**: Crushed Stone Aggregate, Recycled Concrete Material, Mineral Ore Concentrate  

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

### Q: What materials are used in manufacturing eccentric shafts for jaw crushers?
**A**: Our eccentric shafts are manufactured from high-quality forged alloy steel, providing superior strength, durability, and resistance to wear and fatigue in demanding machinery applications.

### Q: How does an eccentric shaft convert rotary motion to reciprocating motion in a jaw crusher?
**A**: The eccentric shaft's offset center of mass creates an unbalanced rotation that drives the movable jaw in a reciprocating motion, enabling the crushing action against the fixed jaw to process materials.

### Q: What maintenance is required for eccentric shafts in heavy machinery?
**A**: Regular inspection of bearing journals for wear, lubrication of bearings, monitoring of vibration levels, and checking keyway integrity are essential maintenance practices to ensure optimal performance and longevity.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS - LIMITS AND FITS)
- ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: ECCENTRIC_SHAFT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9040a375
