---
title: "Last Holder"
industry: "Leather and Related Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LAST_HOLDER"
  data_integrity_hash: "3c4ed43f22b595afc3acb87b1a5931af"
  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:LAST_HOLDER"
  data_source_uri: "https://cnfx.com/llms/industry/leather-and-related-product-manufacturing/product/last-holder.md"
  official_resource_url: "https://cnfx.com/industry/leather-and-related-product-manufacturing/product/last-holder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-25 NÂ·m clamping torque, 0.05-0.15 mm positional tolerance"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 12
    unit: "NÂ"
    consequence: "Clamping surface wear exceeding 0.1 mm depth reduces friction coefficient from Î¼=0.35 to Î¼&lt;0.25, causing slippage under 12 NÂ·m force"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic loading at 5 Hz frequency exceeding 10â¶ cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Redesign with fillet radius Râ‰¥3 mm and shot peening to induce 400 MPa compressive residual stress"
  - node_2:
      trigger: "Contaminant particle accumulation &gt;50 Î¼m thickness on clamping surfaces"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate pneumatic purge system with 0.5 bar pressure and HEPA filtration at intake"
bom_nodes:
  clamping-jaw:
    type: "component"
    urn: "URN:CNFX:ME:CLAMPING_JAW"
    interface_type: "physical-logic-coupled"
  actuation-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATION_MECHANISM"
    interface_type: "physical-logic-coupled"
  mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/leather-and-related-product-manufacturing/product/last-holder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "aba9acb7a2371e232cf5f8ccfc8458ea6068bc342f27e8933e3aa1598750a8db"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Last Holder

## 1. Technical Definition
A clamping mechanism that securely holds the shoe last in position during the upper stretching process.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-25 NÂ·m clamping torque, 0.05-0.15 mm positional tolerance**. Failure boundary: **Clamping force drops below 12 NÂ·m or positional deviation exceeds 0.2 mm**, Mechanism: **Clamping surface wear exceeding 0.1 mm depth reduces friction coefficient from Î¼=0.35 to Î¼&lt;0.25, causing slippage under 12 NÂ·m force**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cyclic loading at 5 Hz frequency exceeding 10â¶ cycles | 8 | Clamping jaw fatigue fracture at stress concentration points | Redesign with fillet radius Râ‰¥3 mm and shot peening to induce 400 MPa compressive residual stress |
| Contaminant particle accumulation &gt;50 Î¼m thickness on clamping surfaces | 8 | Inconsistent clamping force distribution causing last rotation &gt;2Â° | Integrate pneumatic purge system with 0.5 bar pressure and HEPA filtration at intake |

## 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**: **Upper Stretching Machine**, **Shoe Lasting Machine**, **Industrial Air Compressor**  
**Downstream Applications**: Leather Dress Shoes, Synthetic Athletic Footwear, Custom Orthopedic Shoes  

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

### Q: What materials are used in the Last Holder construction?
**A**: The Last Holder is constructed from high-grade Carbon Steel and Alloy Steel components, providing exceptional durability and resistance to wear during repeated use in leather manufacturing environments.

### Q: How does the Last Holder improve shoe manufacturing efficiency?
**A**: The clamping mechanism securely holds shoe lasts in precise positions during upper stretching, reducing setup time, minimizing errors, and ensuring consistent quality across production batches.

### Q: What maintenance does the Last Holder require?
**A**: Regular inspection of the actuation mechanism and clamping jaws is recommended. The carbon steel construction requires minimal maintenance beyond occasional lubrication and cleaning to remove leather residue.

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

---
### ðŸ› ï¸ Engineering Resource Access
ðŸ”— **[Full Specification: Last Holder](https://cnfx.com/industry/leather-and-related-product-manufacturing/product/last-holder)**

### ðŸŒ 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**: LAST_HOLDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a8f7e0f2
