---
title: "Drive Nut or Motor Coupling"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DRIVE_NUT_OR_MOTOR_COUPLING"
  data_integrity_hash: "867ee541277fb9fbc5e56618bea27eb7"
  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:DRIVE_NUT_OR_MOTOR_COUPLING"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-nut-or-motor-coupling.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drive-nut-or-motor-coupling"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-15 N·m torque transmission, -40°C to 120°C temperature range, 0.01-0.05 mm radial misalignment tolerance"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 400
    unit: "MPa"
    consequence: "Fatigue failure due to cyclic torsional loading exceeding material endurance limit (typically 0.4×ultimate tensile strength), fretting corrosion at spline interfaces from micromotion under load, resonance-induced stress amplification at critical speed (ω_c = √(k/J) where k=stiffness, J=polar moment of inertia)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm parallel offset or 0.5° angular misalignment"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser alignment during installation with 0.01 mm tolerance, flexible disc coupling design with 0.15° angular compensation"
  - node_2:
      trigger: "Torque overload exceeding 1.5× rated capacity for &gt;10 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Torque limiter with mechanical fuse set at 1.3× rated torque, finite element analysis optimization of fillet radius (r/d≥0.06)"
bom_nodes:
  coupling-hub:
    type: "part"
    urn: "URN:CNFX:ME:COUPLING_HUB"
    interface_type: "physical-logic-coupled"
  flexible-element:
    type: "component"
    urn: "URN:CNFX:ME:FLEXIBLE_ELEMENT"
    interface_type: "physical-logic-coupled"
  threaded-insert:
    type: "component"
    urn: "URN:CNFX:ME:THREADED_INSERT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-nut-or-motor-coupling.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "e08f8518415653263d4e6d4782a7ae3a4e12ed471383808619c642661802c5e8"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Drive Nut or Motor Coupling

## 1. Technical Definition
A mechanical component that transmits torque from the motor to the lead screw or directly connects the motor shaft to the drive mechanism in a positioning stage platform.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-15 N·m torque transmission, -40°C to 120°C temperature range, 0.01-0.05 mm radial misalignment tolerance**. Failure boundary: **Shear stress exceeds 400 MPa for steel alloys (yield strength), torsional deflection exceeds 0.1° per 100 mm length, vibration amplitude exceeds 25 μm RMS at 1000 Hz**, Mechanism: **Fatigue failure due to cyclic torsional loading exceeding material endurance limit (typically 0.4×ultimate tensile strength), fretting corrosion at spline interfaces from micromotion under load, resonance-induced stress amplification at critical speed (ω_c = √(k/J) where k=stiffness, J=polar moment of inertia)**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.05 mm parallel offset or 0.5° angular misalignment | 8 | Premature bearing wear with vibration increase of 3× baseline within 100 operating hours | Laser alignment during installation with 0.01 mm tolerance, flexible disc coupling design with 0.15° angular compensation |
| Torque overload exceeding 1.5× rated capacity for &gt;10 cycles | 8 | Shear failure at keyway stress concentration (K_t=2.5) with crack initiation at 45° to shaft axis | Torque limiter with mechanical fuse set at 1.3× rated torque, finite element analysis optimization of fillet radius (r/d≥0.06) |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Industrial Heat Treatment Furnace**  
**Downstream Applications**: Linear Positioning Stages, Precision Gantry Systems, Automated Assembly Equipment  

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

### Q: What is the primary function of a drive nut or motor coupling in machinery?
**A**: It transmits torque from the motor to the lead screw or directly connects the motor shaft to the drive mechanism in positioning stage platforms, ensuring precise motion control.

### Q: Which materials are commonly used for drive nut/motor couplings and why?
**A**: Stainless steel for corrosion resistance and strength, aluminum alloy for lightweight applications, and engineering plastic for vibration damping and electrical insulation.

### Q: What are the key components in a drive nut/motor coupling assembly?
**A**: The main components are the coupling hub (connects to shafts), flexible element (absorbs misalignment and vibration), and threaded insert (for secure mounting and torque transmission).

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

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

### 🌐 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**: DRIVE_NUT_OR_MOTOR_COUPLING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8438f632
