---
title: "Lead Screw / Rack"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LEAD_SCREW_RACK"
  data_integrity_hash: "35767329c00cb7378b0cae9b8585f6bb"
  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:LEAD_SCREW_RACK"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/lead-screw-rack.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/lead-screw-rack"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-100 kN axial load, 0.01-2.0 m/s linear velocity, -40°C to 120°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 110
    unit: "kN"
    consequence: "Plastic deformation from combined bending-torsion stress (σ_vM &gt; 0.8σ_yield), pitting fatigue at 10^7 cycles (ISO 3408-5), stick-slip friction at &lt;0.05 lubrication film ratio"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm/mm over 300 mm length"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral mounting surfaces with 0.02 mm flatness tolerance and preloaded angular contact bearings"
  - node_2:
      trigger: "Contaminant ingress (ISO 4406 &gt; 18/16/13)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "IP67-rated bellows seals with 0.3 MPa purge pressure and magnetic particle filters"
bom_nodes:
  threads:
    type: "component"
    urn: "URN:CNFX:ME:THREADS"
    interface_type: "physical-logic-coupled"
  shaftbody:
    type: "component"
    urn: "URN:CNFX:ME:SHAFTBODY"
    interface_type: "physical-logic-coupled"
  end-machining:
    type: "component"
    urn: "URN:CNFX:ME:END_MACHINING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/lead-screw-rack.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "cfac6633126d69de901fca8b5cfe04bb47ae02d6303893e6a468e2d027140b29"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Lead Screw / Rack

## 1. Technical Definition
A mechanical component that converts rotational motion into linear motion for precise depth positioning.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 kN axial load, 0.01-2.0 m/s linear velocity, -40°C to 120°C ambient temperature**. Failure boundary: **Buckling at 110 kN (Euler critical load), Hertzian contact stress exceeding 1.2 GPa at ball-screw interface, thermal expansion exceeding 12 μm/m·K differential**, Mechanism: **Plastic deformation from combined bending-torsion stress (σ_vM &gt; 0.8σ_yield), pitting fatigue at 10^7 cycles (ISO 3408-5), stick-slip friction at &lt;0.05 lubrication film ratio**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.05 mm/mm over 300 mm length | 8 | Accelerated wear at nut flange interface (wear rate &gt; 0.01 mm/10^6 cycles) | Integral mounting surfaces with 0.02 mm flatness tolerance and preloaded angular contact bearings |
| Contaminant ingress (ISO 4406 &gt; 18/16/13) | 8 | Abrasive wear increasing coefficient of friction to &gt;0.15 | IP67-rated bellows seals with 0.3 MPa purge pressure and magnetic particle filters |

## 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 Machining Center**, **Coordinate Measuring Machine**, **Industrial Lubrication System**  
**Downstream Applications**: 3D Printers, CNC Machine Tools, Industrial Robots  

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

### Q: What are the main applications of lead screws and racks in machinery manufacturing?
**A**: Lead screws and racks are essential for precision linear motion in CNC machines, 3D printers, automated assembly lines, and positioning systems where accurate depth control is required.

### Q: How do I choose between steel, stainless steel, and brass materials for my application?
**A**: Steel offers high strength for heavy loads, stainless steel provides corrosion resistance for harsh environments, and brass offers excellent wear resistance and smooth operation with lower maintenance requirements.

### Q: What specifications should I consider when ordering custom lead screws?
**A**: Key specifications include thread pitch, diameter, length, material grade, tolerance levels, end machining requirements, and load capacity to ensure compatibility with your machinery's performance needs.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Lead Screw / Rack](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/lead-screw-rack)**

### 🌐 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**: LEAD_SCREW_RACK | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f13468b6
