---
title: "Ball Nut"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BALL_NUT"
  data_integrity_hash: "92c8a2bb443de1ba5f6e784024c48bfb"
  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:BALL_NUT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ball-nut.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ball-nut"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Axial load 0.5-15 kN, rotational speed 100-3000 rpm, temperature -20°C to 80°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.5
    unit: "GPa"
    consequence: "Hertzian contact fatigue from cyclic loading exceeding material endurance limit (SAE 52100 steel: 1.2 GPa), ball skidding due to insufficient preload, lubricant film breakdown at λ ratio &lt;1"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (ISO 4406: &gt;18/16/13 particle count)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral wiper seals with 0.5 μm filtration, positive pressure purge system at 0.1 bar"
  - node_2:
      trigger: "Thermal expansion mismatch (Δα=12×10⁻⁶/°C between nut and screw)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Temperature-compensating preload mechanism with Invar spacers (α=1.2×10⁻⁶/°C)"
bom_nodes:
  nut-body:
    type: "component"
    urn: "URN:CNFX:ME:NUT_BODY"
    interface_type: "physical-logic-coupled"
  recirculation-system:
    type: "part"
    urn: "URN:CNFX:ME:RECIRCULATION_SYSTEM"
    interface_type: "physical-logic-coupled"
  sealswipers:
    type: "component"
    urn: "URN:CNFX:ME:SEALSWIPERS"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    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/ASME B5.48-1977 (BALL SCREWS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 69051-1:2018 (BALL SCREW DRIVES - PART 1: GENERAL CHARACTERISTICS, ACCEPTANCE CONDITIONS, DESIGNATION)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ball-nut.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "a6727ee9178cd8e74e3289419a7914280d9f9fb98e4eec06e1bad9de230eb6d5"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Ball Nut

## 1. Technical Definition
A precision mechanical component that houses and guides the recirculating balls in a ball screw assembly, converting rotary motion into linear motion.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Axial load 0.5-15 kN, rotational speed 100-3000 rpm, temperature -20°C to 80°C**. Failure boundary: **Ball track Hertzian contact stress exceeding 3.5 GPa, ball recirculation velocity surpassing 4 m/s, axial clearance exceeding 15 μm**, Mechanism: **Hertzian contact fatigue from cyclic loading exceeding material endurance limit (SAE 52100 steel: 1.2 GPa), ball skidding due to insufficient preload, lubricant film breakdown at λ ratio &lt;1**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (ISO 4406: &gt;18/16/13 particle count) | 8 | Abrasive wear on ball tracks increasing axial backlash to &gt;20 μm | Integral wiper seals with 0.5 μm filtration, positive pressure purge system at 0.1 bar |
| Thermal expansion mismatch (Δα=12×10⁻⁶/°C between nut and screw) | 8 | Preload loss below 2% of dynamic load rating causing positioning error &gt;10 μm/300mm | Temperature-compensating preload mechanism with Invar spacers (α=1.2×10⁻⁶/°C) |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Grinding Machine**, **Coordinate Measuring Machine**, **Industrial Washer**  
**Downstream Applications**: CNC Machine Tools, Industrial Robots, Aerospace Actuators  

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

### Q: What materials are ball nuts typically made from?
**A**: Ball nuts are commonly manufactured from carbon steel, alloy steel, or stainless steel, chosen based on the required strength, corrosion resistance, and application environment in machinery.

### Q: What are the main components of a ball nut assembly?
**A**: A ball nut assembly consists of the nut body, a recirculation system for the balls, seals or wipers to retain lubrication and exclude contaminants, and often a mounting flange for secure installation.

### Q: How does a ball nut function in a ball screw system?
**A**: The ball nut houses and guides recirculating balls within a ball screw assembly. As the screw rotates, the balls roll along the helical raceway, converting the rotary motion of the screw into precise linear motion of the nut.

## 6. Manufacturing Compliance
- ISO 3408-1:2006 (BALL SCREWS - PART 1: VOCABULARY AND DESIGNATION)
- ANSI/ASME B5.48-1977 (BALL SCREWS)
- DIN 69051-1:2018 (BALL SCREW DRIVES - PART 1: GENERAL CHARACTERISTICS, ACCEPTANCE CONDITIONS, DESIGNATION)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Ball Nut](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ball-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**: BALL_NUT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: bec5334c
