---
title: "Unwind Spindle / Mandrel"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:UNWIND_SPINDLE_MANDREL"
  data_integrity_hash: "e3d8f3a058c320dbe63925524205d91e"
  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:UNWIND_SPINDLE_MANDREL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/unwind-spindle-mandrel.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/unwind-spindle-mandrel"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-1500 rpm rotational speed, 50-200 N·m torque, 0.02-0.05 mm radial runout tolerance"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1800
    unit: "rpm"
    consequence: "Fatigue failure from cyclic bending stress exceeding endurance limit (σ_e=0.5σ_ut for steel), torsional resonance at critical speed ω_c=√(k/J) where k=shaft stiffness, J=polar moment, bearing seizure from thermal expansion ΔL=αLΔT exceeding clearance"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Radial load &gt; bearing dynamic load rating C=15 kN from misaligned roll mounting"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision tapered roller bearings with C=25 kN rating, laser alignment to &lt;0.05 mm/m, real-time vibration monitoring with FFT analysis"
  - node_2:
      trigger: "Surface hardness &lt;60 HRC at shaft-roll interface causing abrasive wear rate &gt;0.01 mm/1000 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Case hardening to 62-64 HRC depth 1.5 mm, diamond-like carbon coating Ra&lt;0.4 μm, infrared temperature monitoring at interface"
bom_nodes:
  shaft-body:
    type: "component"
    urn: "URN:CNFX:ME:SHAFT_BODY"
    interface_type: "physical-logic-coupled"
  chuck-or-locking-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:CHUCK_OR_LOCKING_MECHANISM"
    interface_type: "physical-logic-coupled"
  bearings:
    type: "part"
    urn: "URN:CNFX:ME:BEARINGS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B5.45-1972 (SPINDLES AND NOSE TOOLING FOR MACHINE TOOLS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/unwind-spindle-mandrel.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "e58d4e75d07cb9cc171d46e890c3a7c1fd7a93a017181ad7b89fc4247b69df29"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Unwind Spindle / Mandrel

## 1. Technical Definition
A rotating shaft or mandrel that holds and supports the roll of packaging material during the unwinding process in a dispenser.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-1500 rpm rotational speed, 50-200 N·m torque, 0.02-0.05 mm radial runout tolerance**. Failure boundary: **Exceeds 1800 rpm causing centrifugal force &gt; material yield strength, torque &gt;250 N·m causing shaft shear stress &gt;415 MPa (steel), runout &gt;0.1 mm causing dynamic imbalance &gt;ISO G6.3 grade**, Mechanism: **Fatigue failure from cyclic bending stress exceeding endurance limit (σ_e=0.5σ_ut for steel), torsional resonance at critical speed ω_c=√(k/J) where k=shaft stiffness, J=polar moment, bearing seizure from thermal expansion ΔL=αLΔT exceeding clearance**.

### 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 |
| :--- | :--- | :--- | :--- |
| Radial load &gt; bearing dynamic load rating C=15 kN from misaligned roll mounting | 8 | Bearing race spalling and increased vibration &gt;2.5 mm/s RMS | Precision tapered roller bearings with C=25 kN rating, laser alignment to &lt;0.05 mm/m, real-time vibration monitoring with FFT analysis |
| Surface hardness &lt;60 HRC at shaft-roll interface causing abrasive wear rate &gt;0.01 mm/1000 cycles | 8 | Material slippage and tension loss &gt;20% nominal web tension | Case hardening to 62-64 HRC depth 1.5 mm, diamond-like carbon coating Ra&lt;0.4 μm, infrared temperature monitoring at interface |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Chuck or Locking Mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/chuck-or-locking-mechanism.md) `(Standalone System)`
- [Bearings](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bearings.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Web Tension Control System**, **Roll Stand or Unwind Frame**, **Web Guiding System**  
**Downstream Applications**: Packaged Food Products, Pharmaceutical Blister Packs, Printed Labels  

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

### Q: What materials are available for the unwind spindle?
**A**: Our unwind spindles are manufactured from high-grade alloy steel or corrosion-resistant stainless steel, depending on application requirements.

### Q: How does the locking mechanism secure the material roll?
**A**: The chuck or locking mechanism provides positive grip on the roll core, preventing slippage during high-speed unwinding operations.

### Q: What bearing types are used in these spindles?
**A**: We use precision industrial bearings designed for radial and axial loads to ensure smooth rotation and minimal vibration during operation.

## 6. Manufacturing Compliance
- ISO 1940-1:2003 (BALANCE QUALITY REQUIREMENTS FOR ROTORS)
- ANSI B5.45-1972 (SPINDLES AND NOSE TOOLING FOR MACHINE TOOLS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Unwind Spindle / Mandrel](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/unwind-spindle-mandrel)**

### 🌐 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**: UNWIND_SPINDLE_MANDREL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b00a585d
