---
title: "Chuck or Locking Mechanism"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CHUCK_OR_LOCKING_MECHANISM"
  data_integrity_hash: "2a571e706d07d47464e58b31f0a3f95e"
  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:CHUCK_OR_LOCKING_MECHANISM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/chuck-or-locking-mechanism.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/chuck-or-locking-mechanism"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 kN clamping force, 0.1-0.5 mm radial runout tolerance, -20°C to 120°C operating temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.3
    unit: "kN"
    consequence: "Yield strength of AISI 4140 steel (415 MPa) exceeded due to cyclic loading, thermal expansion coefficient mismatch (11.7×10⁻⁶/°C for steel vs 23×10⁻⁶/°C for aluminum) causing binding"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic pressure drop below 7 bar due to seal degradation"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dual redundant hydraulic circuits with pressure sensors and automatic switchover at 8 bar threshold"
  - node_2:
      trigger: "Accumulated wear particles exceeding 0.05 mm³/cm² in locking mechanism interface"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hard chrome plating (0.05 mm thickness) on contact surfaces with integrated particle flushing channels"
bom_nodes:
  gripping-jawssegments:
    type: "component"
    urn: "URN:CNFX:ME:GRIPPING_JAWSSEGMENTS"
    interface_type: "physical-logic-coupled"
  actuation-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATION_MECHANISM"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
  locking-pinmechanism:
    type: "component"
    urn: "URN:CNFX:ME:LOCKING_PINMECHANISM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 12164-1:2001 (TOOL HOLDERS FOR MACHINING CENTRES - SHANKS AND RETENTION KNOBS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B5.50-1994 (SPECIFICATIONS FOR SPINDLE NOSES AND TOOL SHANKS FOR MACHINE TOOLS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 69893-1:2009 (TOOL HOLDERS FOR MACHINING CENTRES - SHANKS AND RETENTION KNOBS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/chuck-or-locking-mechanism.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3ee7eaff1daca663a98b84491b2a644f8dd8ea31212d721f60896cbbe12e589b"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Chuck or Locking Mechanism

## 1. Technical Definition
A mechanical device that securely holds and releases materials on an unwind spindle or mandrel during processing operations.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 kN clamping force, 0.1-0.5 mm radial runout tolerance, -20°C to 120°C operating temperature**. Failure boundary: **Clamping force drops below 0.3 kN, radial runout exceeds 0.8 mm, temperature exceeds 150°C**, Mechanism: **Yield strength of AISI 4140 steel (415 MPa) exceeded due to cyclic loading, thermal expansion coefficient mismatch (11.7×10⁻⁶/°C for steel vs 23×10⁻⁶/°C for aluminum) causing binding**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic pressure drop below 7 bar due to seal degradation | 8 | Insufficient clamping force causing material slippage on mandrel | Dual redundant hydraulic circuits with pressure sensors and automatic switchover at 8 bar threshold |
| Accumulated wear particles exceeding 0.05 mm³/cm² in locking mechanism interface | 8 | Increased friction leading to binding during release cycle | Hard chrome plating (0.05 mm thickness) on contact surfaces with integrated particle flushing channels |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Unwind Spindle**, **Material Tension Controller**, **Web Guiding System**  
**Downstream Applications**: Rolled Paper Products, Plastic Films, Textile Fabrics  

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

### Q: What materials are used in this chuck or locking mechanism?
**A**: This mechanism is constructed from durable materials including alloy steel, hardened tool steel, and aluminum alloy to ensure strength and longevity in industrial environments.

### Q: How does the actuation mechanism work in this chuck?
**A**: The actuation mechanism engages the gripping jaws or segments to securely hold materials on the unwind spindle or mandrel, then releases them when processing is complete.

### Q: What are the main components in the BOM for this locking mechanism?
**A**: The bill of materials includes the actuation mechanism, gripping jaws/segments, locking pin/mechanism, and mounting flange for secure installation on machinery.

## 6. Manufacturing Compliance
- ISO 12164-1:2001 (TOOL HOLDERS FOR MACHINING CENTRES - SHANKS AND RETENTION KNOBS)
- ANSI B5.50-1994 (SPECIFICATIONS FOR SPINDLE NOSES AND TOOL SHANKS FOR MACHINE TOOLS)
- DIN 69893-1:2009 (TOOL HOLDERS FOR MACHINING CENTRES - SHANKS AND RETENTION KNOBS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Chuck or Locking Mechanism](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/chuck-or-locking-mechanism)**

### 🌐 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**: CHUCK_OR_LOCKING_MECHANISM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: eb2bde0e
