EN 4008-007:2011

Overview

EN 4008-007:2011 is a European Standard developed by CEN that specifies the product requirements for the positioner used with the M22520/2-01 crimping tool, a critical device for crimping electrical contacts in aerospace applications. This standard is part of the Aerospace series focused on electrical and optical connection elements, particularly crimping tools and their associated accessories. It outlines the dimensions, materials, mechanical features, and marking requirements essential to ensure compatibility and performance when crimping electrical contacts conforming to EN 4008-002.

This standard supersedes EN 4008-007:2006 and was adopted nationally by members of the CEN committee to harmonize quality and safety in aerospace electrical connection tooling.

Key Topics

• Scope and Application: Defines the characteristics of the positioner accessory for the M22520/2-01 crimping tool, used specifically for aerospace electrical contacts.

• Design and Construction:

  • Secure attachment through two bayonet locks and an internal spring-loaded locator.
  • Locator depression specified at 0.79 mm under a precise force (9 ± 4.5 N) to ensure accurate contact positioning.
  • Maximum mass limited to 30 grams with precise dimensional tolerances (± 0.25 mm).

• Materials and Surface Treatment:

  • Body constructed from aluminium alloy, finished in blue color.
  • Ferrule made of stainless steel for durability.

• Marking and Identification:

  • Clear markings required including manufacturer’s name, part number, and standard reference (EN4008-007 or EN4008-007A).
  • Markings help ensure traceability and correct use with the M22520/2-01 basic tool.

• Normative References:

  • Cross-references important aerospace standards such as EN 2591-100 (test methods), EN 4008-001 (technical specifications), EN 4008-002 (product standards for crimping tools), and MIL–C-22520/2-01 (US military specification for crimping tools).

Applications

This standard plays a crucial role in the aerospace industry where electrical contacts and wire terminations must meet stringent reliability and safety requirements. The positioner ensures the M22520/2-01 crimping tool functions precisely, facilitating:

• Assembly of aerospace wiring harnesses.
• Termination of electrical contacts on wires conforming to aerospace specifications.
• Maintenance and repair operations where certified tooling is mandatory.
• Quality control checks ensuring that crimped connections meet exact dimensional and performance criteria.

Using a standardized positioner extends the life of tooling, improves consistency in crimping results, and reduces the risk of electrical connection failures under harsh aerospace environments.

Related Standards

To fully comply with aerospace electrical connection requirements, EN 4008-007:2011 should be used in conjunction with:

• EN 4008-001 - Technical specifications for crimping tools and accessories.
• EN 4008-002 - Product standards specifying the types of electrical contacts to be crimped.
• EN 2591-100 - Test methods applicable for aerospace electrical and optical connection elements.
• MIL–C-22520/2-01 - US Department of Defense specification for hand crimping tools used with the positioner.

Together, these standards establish a comprehensive framework for the design, manufacturing, testing, and use of crimping tools and their accessories in aerospace electrical systems.

Keywords: EN 4008-007:2011, aerospace crimping tools, electrical contacts, positioner, M22520/2-01 crimping tool, aerospace standards, wire termination, electrical connection elements, crimp tool accessories, CEN standard.