---
title: "Attachment interface"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ATTACHMENT_INTERFACE"
  data_integrity_hash: "4cf971abe86c7f9a37994c80a2858e27"
  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:ATTACHMENT_INTERFACE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/attachment-interface.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/attachment-interface"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-35 MPa hydraulic pressure, -40°C to 85°C ambient temperature, 0.5-2.0 mm mating surface tolerance"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 40
    unit: "MPa"
    consequence: "Seal failure due to extrusion at 40 MPa pressure differential (Young's modulus 7 MPa for HNBR seals), thermal contraction mismatch between steel interface (α=11.5×10⁻⁶/°C) and aluminum attachment (α=23.1×10⁻⁶/°C) causing 0.3 mm displacement at -45°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination with 15 μm particles exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate 10 μm absolute filtration with 0.5 bar differential pressure monitoring and automatic bypass at 1.0 bar ΔP"
  - node_2:
      trigger: "Cyclic bending moment of 8500 N·m at 0.5 Hz frequency exceeding yield strength of SAE 1045 steel (415 MPa)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement forged SAE 4340 steel interface with shot peening to 0.4 mm Almen intensity and compressive residual stress of -600 MPa"
bom_nodes:
  mounting-plate:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_PLATE"
    interface_type: "physical-logic-coupled"
  hydraulic-quick-connect-couplings:
    type: "part"
    urn: "URN:CNFX:ME:HYDRAULIC_QUICK_CONNECT_COUPLINGS"
    interface_type: "physical-logic-coupled"
  electrical-connector-block:
    type: "component"
    urn: "URN:CNFX:ME:ELECTRICAL_CONNECTOR_BLOCK"
    interface_type: "physical-logic-coupled"
  locking-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:LOCKING_MECHANISM"
    interface_type: "physical-logic-coupled"
  alignment-pins:
    type: "component"
    urn: "URN:CNFX:ME:ALIGNMENT_PINS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 7184-1:2018-12 (TOLERANCES FOR PLAIN BEARINGS - PART 1: TOLERANCES FOR METALLIC PLAIN BEARINGS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/attachment-interface.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ebf59306934907cb3f26b53bab233d1b774fe3b1e64ebe57f3c995229703f0a6"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Attachment interface

## 1. Technical Definition
The standardized connection point on a heavy forklift that enables the mounting and operation of various attachments.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-35 MPa hydraulic pressure, -40°C to 85°C ambient temperature, 0.5-2.0 mm mating surface tolerance**. Failure boundary: **Hydraulic pressure exceeding 40 MPa causes seal extrusion, temperature below -45°C embrittles O-rings, mating surface gap exceeding 2.5 mm causes hydraulic fluid leakage exceeding 5 mL/min**, Mechanism: **Seal failure due to extrusion at 40 MPa pressure differential (Young's modulus 7 MPa for HNBR seals), thermal contraction mismatch between steel interface (α=11.5×10⁻⁶/°C) and aluminum attachment (α=23.1×10⁻⁶/°C) causing 0.3 mm displacement at -45°C**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination with 15 μm particles exceeding ISO 4406 18/16/13 cleanliness level | 8 | Spool valve sticking causing 500 ms response delay and 20% pressure drop | Integrate 10 μm absolute filtration with 0.5 bar differential pressure monitoring and automatic bypass at 1.0 bar ΔP |
| Cyclic bending moment of 8500 N·m at 0.5 Hz frequency exceeding yield strength of SAE 1045 steel (415 MPa) | 8 | Interface plate fatigue cracking initiating at stress concentration factor Kt=3.2 fillet radius | Implement forged SAE 4340 steel interface with shot peening to 0.4 mm Almen intensity and compressive residual stress of -600 MPa |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Hydraulic quick-connect couplings](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-quick-connect-couplings.md) `(Standalone System)`
- [Locking mechanism](https://cnfx.com/llms/industry/fabricated-metal-product-manufacturing/product/locking-mechanism.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Heavy Forklift**, **Hydraulic Power Unit**, **Attachment Control System**  
**Downstream Applications**: Palletized Loads, Bulk Material Handling, Specialized Material Transport  

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

### Q: What materials are used in heavy forklift attachment interfaces?
**A**: Our attachment interfaces are constructed from high-strength steel and hardened alloy steel for maximum durability and load-bearing capacity in industrial environments.

### Q: How does the locking mechanism ensure attachment security?
**A**: The integrated locking mechanism provides positive engagement with attachments, preventing accidental disconnection during operation while allowing quick changeovers when needed.

### Q: What attachments can connect to this standardized interface?
**A**: This interface supports various forklift attachments including clamps, rotators, side shifters, and specialized tools through its universal mounting plate and hydraulic/electrical connections.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)
- ANSI B4.1-1967 (PREFERRED LIMITS AND FITS FOR CYLINDRICAL PARTS)
- DIN 7184-1:2018-12 (TOLERANCES FOR PLAIN BEARINGS - PART 1: TOLERANCES FOR METALLIC PLAIN BEARINGS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Attachment interface](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/attachment-interface)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: ATTACHMENT_INTERFACE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: db2204a0
