---
title: "Linear Rail"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LINEAR_RAIL"
  data_integrity_hash: "be186bf8e19096d1d51875c0b94d24e2"
  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:LINEAR_RAIL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/linear-rail.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/linear-rail"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-100 m/s linear velocity, -20°C to 80°C ambient temperature, 0.5-50 kN dynamic load capacity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 2.5
    unit: "GPa"
    consequence: "Subsurface fatigue cracking due to cyclic Hertzian contact stress exceeding material endurance limit (approximately 1.8 GPa for GCr15 bearing steel), leading to spalling and loss of geometric accuracy"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant particle ingress (ISO 4406 cleanliness class &gt; 16/14/11)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral wiper seals with 0.05 mm interference fit, positive pressure labyrinth seals with 0.3 bar differential"
  - node_2:
      trigger: "Thermal expansion mismatch between rail (steel, α=11.5×10⁻⁶/K) and mounting surface (aluminum, α=23×10⁻⁶/K)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Thermal compensation slots at 150 mm intervals, controlled preload at 0.003×C dynamic load"
bom_nodes:
  rail:
    type: "component"
    urn: "URN:CNFX:ME:RAIL"
    interface_type: "physical-logic-coupled"
  carriage-sliderblock:
    type: "part"
    urn: "URN:CNFX:ME:CARRIAGE_SLIDERBLOCK"
    interface_type: "physical-logic-coupled"
  ball-bearings:
    type: "component"
    urn: "URN:CNFX:ME:BALL_BEARINGS"
    interface_type: "physical-logic-coupled"
  end-seal-wiper:
    type: "component"
    urn: "URN:CNFX:ME:END_SEAL_WIPER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 3408-1:2006 (BALL SCREWS - PART 1: VOCABULARY AND DESIGNATION)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B5.48-1977 (BALL AND ROLLER SLIDES - LINEAR MOTION ROLLING BEARINGS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 645-1:1987 (LINEAR BALL BEARINGS - PART 1: DIMENSIONS AND TOLERANCES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/linear-rail.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "5629462047eddde4b57c99e3f5935d0090e707140264d2ef471760aa68d06224"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Linear Rail

## 1. Technical Definition
A precision linear motion component that provides rigid guidance and support for moving carriages or sliders along a straight path.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 m/s linear velocity, -20°C to 80°C ambient temperature, 0.5-50 kN dynamic load capacity**. Failure boundary: **Hertzian contact stress exceeding 2.5 GPa at ball/rail interface, surface roughness Ra &gt; 0.8 μm, lubrication film thickness &lt; 0.1 μm**, Mechanism: **Subsurface fatigue cracking due to cyclic Hertzian contact stress exceeding material endurance limit (approximately 1.8 GPa for GCr15 bearing steel), leading to spalling and loss of geometric accuracy**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant particle ingress (ISO 4406 cleanliness class &gt; 16/14/11) | 8 | Three-body abrasive wear at ball/rail interface, increasing rolling resistance by &gt;15% | Integral wiper seals with 0.05 mm interference fit, positive pressure labyrinth seals with 0.3 bar differential |
| Thermal expansion mismatch between rail (steel, α=11.5×10⁻⁶/K) and mounting surface (aluminum, α=23×10⁻⁶/K) | 8 | Rail bowing exceeding 0.02 mm/m at ΔT=30°C, causing carriage binding | Thermal compensation slots at 150 mm intervals, controlled preload at 0.003×C dynamic load |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Carriage (Slider/Block)](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/carriage-sliderblock.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Linear Motor**, **Ball Screw Assembly**, **CNC Controller**  
**Downstream Applications**: CNC Machining Centers, 3D Printers, Automated Assembly Lines  

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

### Q: What materials are used in your linear rails and what are their advantages?
**A**: Our linear rails are manufactured from Hardened Carbon Chrome Steel (SUJ2/52100) for superior wear resistance and load capacity, or Stainless Steel (SUS440C) for corrosion resistance in harsh environments.

### Q: How does the ball bearing system in linear rails improve performance?
**A**: The precision ball bearings in our linear rails provide smooth, low-friction motion with high rigidity and accuracy, reducing maintenance needs and extending service life in demanding machinery applications.

### Q: What maintenance is required for linear rails in industrial equipment?
**A**: Regular cleaning of rails and carriages, lubrication of ball bearings, and inspection of end seals/wipers are recommended. Our hardened steel construction minimizes wear, but periodic alignment checks ensure optimal performance.

## 6. Manufacturing Compliance
- ISO 3408-1:2006 (BALL SCREWS - PART 1: VOCABULARY AND DESIGNATION)
- ANSI B5.48-1977 (BALL AND ROLLER SLIDES - LINEAR MOTION ROLLING BEARINGS)
- DIN 645-1:1987 (LINEAR BALL BEARINGS - PART 1: DIMENSIONS AND TOLERANCES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Linear Rail](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/linear-rail)**

### 🌐 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**: LINEAR_RAIL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 90d671e0
