---
title: "Recirculating Ball Nut"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:RECIRCULATING_BALL_NUT"
  data_integrity_hash: "23e5880e253a888e1fa6f34876da8fe8"
  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:RECIRCULATING_BALL_NUT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/recirculating-ball-nut.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/recirculating-ball-nut"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 m/s linear velocity, 0.1-10 kN axial load, -20°C to 120°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 58
    unit: "HRC"
    consequence: "Surface pitting fatigue due to Hertzian contact stress exceeding 2.1 GPa, ball skidding at acceleration &gt; 5 m/s² causing adhesive wear, thermal expansion mismatch between ball (steel, α=11×10⁻⁶/°C) and nut (aluminum, α=23×10⁻⁶/°C) above 100°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (ISO 4406:2017 Class 19/17/14 or worse) into ball circuit"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral labyrinth seals with 0.05 mm radial clearance and positive-pressure grease purge system"
  - node_2:
      trigger: "Axial preload loss due to mounting surface flatness deviation &gt; 0.01 mm/100 mm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dual preload adjustment mechanism with 0.001 mm resolution and strain gauge monitoring"
bom_nodes:
  nut-body:
    type: "component"
    urn: "URN:CNFX:ME:NUT_BODY"
    interface_type: "physical-logic-coupled"
  ball-return-tubedeflector:
    type: "component"
    urn: "URN:CNFX:ME:BALL_RETURN_TUBEDEFLECTOR"
    interface_type: "physical-logic-coupled"
  ball-bearings:
    type: "component"
    urn: "URN:CNFX:ME:BALL_BEARINGS"
    interface_type: "physical-logic-coupled"
  wiperseal:
    type: "component"
    urn: "URN:CNFX:ME:WIPERSEAL"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 3408-1:2006 (BALL SCREWS - PART 1: VOCABULARY AND DESIGNATION)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 69051-1:2018 (BALL SCREW DRIVES - PART 1: GENERAL SPECIFICATIONS AND ACCEPTANCE CONDITIONS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B5.48-1977 (BALL SCREWS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/recirculating-ball-nut.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "f331f83b854c1a7c3c5c601fffcb795b9bfa7ec05c2218c6f39fdec0abb6d000"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Recirculating Ball Nut

## 1. Technical Definition
A precision mechanical component that converts rotary motion into linear motion with minimal friction using recirculating ball bearings.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 m/s linear velocity, 0.1-10 kN axial load, -20°C to 120°C operating temperature**. Failure boundary: **Ball track surface hardness drops below 58 HRC, ball diameter wear exceeds 0.01 mm, preload torque exceeds 150% of nominal value**, Mechanism: **Surface pitting fatigue due to Hertzian contact stress exceeding 2.1 GPa, ball skidding at acceleration &gt; 5 m/s² causing adhesive wear, thermal expansion mismatch between ball (steel, α=11×10⁻⁶/°C) and nut (aluminum, α=23×10⁻⁶/°C) above 100°C**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (ISO 4406:2017 Class 19/17/14 or worse) into ball circuit | 8 | Three-body abrasive wear causing ball track scoring and increased rolling resistance | Integral labyrinth seals with 0.05 mm radial clearance and positive-pressure grease purge system |
| Axial preload loss due to mounting surface flatness deviation &gt; 0.01 mm/100 mm | 8 | Backlash exceeding 0.005 mm causing positioning error and impact loading | Dual preload adjustment mechanism with 0.001 mm resolution and strain gauge monitoring |

## 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 Washer and Degreaser**  
**Downstream Applications**: CNC Machine Tools, Industrial Robots, Precision Linear Actuators  

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

### Q: What are the main advantages of recirculating ball nuts over other linear motion components?
**A**: Recirculating ball nuts offer superior precision, minimal friction, high efficiency, and long service life compared to alternatives like acme screws or plain bearings, making them ideal for precision machinery applications.

### Q: What materials are commonly used in recirculating ball nut construction?
**A**: Common materials include bearing steel (GCr15/52100) for ball bearings, case-hardened steel for the nut body, and stainless steel for corrosion resistance. Ball return tubes are typically made from hardened steel or polymer composites.

### Q: How do I maintain and extend the lifespan of a recirculating ball nut?
**A**: Regular lubrication with appropriate grease, keeping wipers/seals clean and intact, preventing contamination from debris, and avoiding overload conditions will maximize performance and extend the operational lifespan of recirculating ball nuts.

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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Recirculating Ball Nut](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/recirculating-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**: RECIRCULATING_BALL_NUT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8e757fa7
