---
title: "Nut"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:NUT"
  data_integrity_hash: "bf30db26931c0a23ebc490267c996264"
  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:NUT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/nut.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/nut"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-5.0 m/s linear velocity, 0.01-0.05 mm backlash tolerance, 20-120°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 5.5
    unit: "m"
    consequence: "Hertzian contact stress exceeding material yield strength (SAE 52100 steel: 1.72 GPa ultimate tensile strength), ball skidding due to centrifugal forces at high DN values (&gt;70,000 mm-rpm), lubricant breakdown at &gt;120°C (ISO VG 32 mineral oil flash point)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (ISO 4406: &gt;18/16/13 particle count) into ball track"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral wiper seals with &lt;10 μm exclusion rating, positive pressure purge system at 0.2 bar above ambient"
  - node_2:
      trigger: "Preload loss due to thermal cycling (ΔT &gt;80°C) causing differential expansion"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Matched coefficient of thermal expansion materials (nut: 11.5×10⁻⁶/°C aluminum, screw: 11.7×10⁻⁶/°C steel), temperature-compensated preload adjustment mechanism"
bom_nodes:
  ball-return-system:
    type: "part"
    urn: "URN:CNFX:ME:BALL_RETURN_SYSTEM"
    interface_type: "physical-logic-coupled"
  thread-profile:
    type: "component"
    urn: "URN:CNFX:ME:THREAD_PROFILE"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
  sealswipers:
    type: "component"
    urn: "URN:CNFX:ME:SEALSWIPERS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/nut.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c422edfd054b650a9a01eb8a67d9fe4dabee1cc80cd0356734f0eb82e08e8ada"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Nut

## 1. Technical Definition
A mechanical component that converts rotary motion into linear motion in ball screw/lead screw assemblies.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-5.0 m/s linear velocity, 0.01-0.05 mm backlash tolerance, 20-120°C operating temperature**. Failure boundary: **Ball recirculation failure at &gt;5.5 m/s linear velocity, thread deformation at &gt;150 MPa contact stress, thermal expansion mismatch at &gt;130°C differential temperature**, Mechanism: **Hertzian contact stress exceeding material yield strength (SAE 52100 steel: 1.72 GPa ultimate tensile strength), ball skidding due to centrifugal forces at high DN values (&gt;70,000 mm-rpm), lubricant breakdown at &gt;120°C (ISO VG 32 mineral oil flash point)**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (ISO 4406: &gt;18/16/13 particle count) into ball track | 8 | Abrasive wear causing &gt;0.1 mm backlash increase per 100 km travel | Integral wiper seals with &lt;10 μm exclusion rating, positive pressure purge system at 0.2 bar above ambient |
| Preload loss due to thermal cycling (ΔT &gt;80°C) causing differential expansion | 8 | Positional accuracy degradation &gt;±15 μm over 300 mm travel | Matched coefficient of thermal expansion materials (nut: 11.5×10⁻⁶/°C aluminum, screw: 11.7×10⁻⁶/°C steel), temperature-compensated preload adjustment mechanism |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Ball Return System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ball-return-system.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Lathe**, **Thread Rolling Machine**, **Heat Treatment Furnace**  
**Downstream Applications**: CNC Machine Tools, Industrial Robots, Aerospace Actuators  

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

### Q: What materials are available for these nuts and which is best for my application?
**A**: Our nuts come in steel (high strength, durability), bronze (self-lubricating, wear resistance), and plastic (lightweight, corrosion-resistant). Steel is ideal for heavy-duty machinery, bronze for high-wear applications, and plastic for corrosive environments or where weight reduction is critical.

### Q: How do I maintain and extend the lifespan of a ball screw nut?
**A**: Regular lubrication is essential. Use appropriate grease or oil based on material and operating conditions. Keep seals/wipers clean to prevent contamination. Monitor for backlash or unusual noise, which indicates wear. Follow manufacturer torque specifications during installation.

### Q: Can these nuts be customized for specific machinery requirements?
**A**: Yes, we offer customization options including specific thread profiles, mounting flange configurations, specialized seals/wipers for harsh environments, and integration with custom ball return systems. Provide your machinery specs for tailored solutions.

## 6. Manufacturing Compliance

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

### 🌐 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**: NUT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 18fc9c6b
