---
title: "Tool Holder"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TOOL_HOLDER"
  data_integrity_hash: "6f3ed363bc5d1ada71636012081e7d56"
  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:TOOL_HOLDER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/tool-holder.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/tool-holder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Clamping force: 500-5000 N, Taper tolerance: AT3 grade (radial runout ≤ 3 μm), Temperature: -20°C to 150°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "N"
    consequence: "Hysteresis loss in collet elastic deformation exceeding 0.2% strain limit, Differential thermal expansion between steel holder (α=11.5×10⁻⁶/°C) and carbide tool (α=4.5×10⁻⁶/°C) at ΔT&gt;30°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic torsional loading exceeding 250 N·m at 2000+ RPM"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened taper surfaces (60+ HRC) with TiN coating (3-5 μm thickness)"
  - node_2:
      trigger: "Coolant ingress with chloride concentration &gt;500 ppm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Corrosion-resistant steel (AISI 440C) with passivation layer"
bom_nodes:
  taper-shank:
    type: "component"
    urn: "URN:CNFX:ME:TAPER_SHANK"
    interface_type: "physical-logic-coupled"
  clamping-mechanism-e-g-collet-nut-clamping-screw:
    type: "component"
    urn: "URN:CNFX:ME:CLAMPING_MECHANISM_E_G_COLLET_NUT_CLAMPING_SCREW"
    interface_type: "physical-logic-coupled"
  body:
    type: "component"
    urn: "URN:CNFX:ME:BODY"
    interface_type: "physical-logic-coupled"
  pull-stud-retention-knob:
    type: "component"
    urn: "URN:CNFX:ME:PULL_STUD_RETENTION_KNOB"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 26622-1:2008 (MODULAR TOOLING SYSTEMS FOR MACHINE TOOLS - TOOL HOLDERS WITH CYLINDRICAL SHANK)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B5.50-1994 (TOOL SHANKS FOR CUTTING TOOLS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/tool-holder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "84c9e6b9d9ef6f66e7cc57e36ed8569c9088ef7983c7c80801a25c925b21694d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Tool Holder

## 1. Technical Definition
A mechanical component that securely clamps and positions cutting tools within a cutting head assembly.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Clamping force: 500-5000 N, Taper tolerance: AT3 grade (radial runout ≤ 3 μm), Temperature: -20°C to 150°C**. Failure boundary: **Clamping force &lt; 450 N (tool slippage), Radial runout &gt; 5 μm (vibration-induced failure), Temperature &gt; 180°C (thermal expansion mismatch)**, Mechanism: **Hysteresis loss in collet elastic deformation exceeding 0.2% strain limit, Differential thermal expansion between steel holder (α=11.5×10⁻⁶/°C) and carbide tool (α=4.5×10⁻⁶/°C) at ΔT&gt;30°C**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cyclic torsional loading exceeding 250 N·m at 2000+ RPM | 8 | Taper interface fretting wear with &gt;50 μm material loss | Hardened taper surfaces (60+ HRC) with TiN coating (3-5 μm thickness) |
| Coolant ingress with chloride concentration &gt;500 ppm | 8 | Stress corrosion cracking at collet slit stress concentrators (Kt=3.2) | Corrosion-resistant steel (AISI 440C) with passivation layer |

## 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**, **Tool Grinding Machine**, **Coordinate Measuring Machine**  
**Downstream Applications**: Automotive Engine Components, Aerospace Structural Parts, Medical Device Implants  

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

### Q: What materials are used in these tool holders and why?
**A**: Our tool holders are manufactured from alloy steel and carbide. Alloy steel provides excellent strength and durability for the body and clamping components, while carbide offers superior wear resistance for high-precision applications in machinery manufacturing.

### Q: How does the clamping mechanism ensure tool security?
**A**: The clamping mechanism, including collet nuts and clamping screws, applies uniform pressure to securely hold cutting tools in place. This prevents tool slippage during operation and maintains precise positioning within the cutting head assembly for consistent machining results.

### Q: What is the purpose of the pull-stud/retention knob in tool holders?
**A**: The pull-stud or retention knob provides secure attachment to the machine spindle, ensuring the tool holder remains firmly in place during high-speed operations. This component is critical for maintaining tool stability and preventing accidents in machinery manufacturing applications.

## 6. Manufacturing Compliance
- ISO 26622-1:2008 (MODULAR TOOLING SYSTEMS FOR MACHINE TOOLS - TOOL HOLDERS WITH CYLINDRICAL SHANK)
- ANSI B5.50-1994 (TOOL SHANKS FOR CUTTING TOOLS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Tool Holder](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/tool-holder)**

### 🌐 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**: TOOL_HOLDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f3aa182e
