---
title: "Rod Shaft"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ROD_SHAFT"
  data_integrity_hash: "fa2f7b2525f3e499ece7133e363dbda0"
  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:ROD_SHAFT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rod-shaft.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/rod-shaft"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-350 MPa tensile stress, -40°C to 150°C temperature, 0.1-3.0 m/s linear velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "MPa"
    consequence: "High-cycle fatigue from cyclic loading exceeding 280 MPa stress amplitude, yielding from tensile stress surpassing 450 MPa yield strength, Euler buckling from compressive loads exceeding 785 kN critical load"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Surface roughness exceeding Ra 0.4 μm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement hard chrome plating with 0.02-0.04 mm thickness and Ra 0.2 μm surface finish, apply shot peening with 0.15-0.25 mm Almen intensity"
  - node_2:
      trigger: "Misalignment exceeding 0.05 mm/mm angular deviation"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install spherical rod eyes with ±3° angular compensation, incorporate linear guide bearings with 0.01 mm/m straightness tolerance"
bom_nodes:
  threaded-end:
    type: "component"
    urn: "URN:CNFX:ME:THREADED_END"
    interface_type: "physical-logic-coupled"
  chrome-plating:
    type: "component"
    urn: "URN:CNFX:ME:CHROME_PLATING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 - CYLINDRICAL FITS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rod-shaft.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3c35fd843b480f1a28d9d176bfb01b32f31309016da864acdb83f0018dfa4e2a"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Rod Shaft

## 1. Technical Definition
The cylindrical structural component that transmits force and motion in a hydraulic cylinder piston rod assembly.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-350 MPa tensile stress, -40°C to 150°C temperature, 0.1-3.0 m/s linear velocity**. Failure boundary: **Yield strength threshold at 450 MPa (AISI 4140 steel), fatigue limit at 280 MPa for 10⁷ cycles, buckling critical load at 785 kN for L/D=10**, Mechanism: **High-cycle fatigue from cyclic loading exceeding 280 MPa stress amplitude, yielding from tensile stress surpassing 450 MPa yield strength, Euler buckling from compressive loads exceeding 785 kN critical load**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Surface roughness exceeding Ra 0.4 μm | 8 | Premature fatigue crack initiation at stress concentrators | Implement hard chrome plating with 0.02-0.04 mm thickness and Ra 0.2 μm surface finish, apply shot peening with 0.15-0.25 mm Almen intensity |
| Misalignment exceeding 0.05 mm/mm angular deviation | 8 | Bending stress concentration at rod-gland interface | Install spherical rod eyes with ±3° angular compensation, incorporate linear guide bearings with 0.01 mm/m straightness 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 Lathe**, **Surface Grinder**, **Hardening Furnace**  
**Downstream Applications**: Hydraulic Cylinders, Construction Equipment, Industrial Presses  

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

### Q: What are the benefits of chrome plating on rod shafts?
**A**: Chrome plating provides superior corrosion resistance, reduces friction for smoother operation, extends service life, and enhances wear resistance in demanding industrial environments.

### Q: Can rod shafts be customized with different thread specifications?
**A**: Yes, our rod shafts can be manufactured with various thread types, sizes, and tolerances to match specific hydraulic cylinder assembly requirements and OEM specifications.

### Q: What maintenance is required for chrome-plated rod shafts?
**A**: Minimal maintenance is needed. Regular inspection for surface damage, keeping rods clean from contaminants, and proper seal compatibility will ensure optimal performance and longevity.

## 6. Manufacturing Compliance
- ISO 286-2:2010 - CYLINDRICAL FITS

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **2** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: ROD_SHAFT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 11260e3b
