SIST EN 3426:2009

Aerospace series - Groove dimensions for axial mounting external type retaining rings

This standard defines the dimensions of grooves for axial mounting, external type, retaining rings.

Luft-und Raumfahrt - Nuten für axial auf Wellen montierbare Sicherungsringe Maße

Diese Norm legt die Maße von Nuten für axial auf Wellen montierbare Sicherungsringe fest.

Série aérospatiale - Dimensions des gorges pour anneaux d'arrêt, type extérieur, à montage axial

Aeronavtika - Mere zarez za zunanje varovalne obroče z radialno namestitvijo

General Information

• Status: Published
• Publication Date: 25-Jun-2009
• ICS: 49.030.99 - Other fasteners
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-May-2009
• Due Date: 03-Aug-2009
• Completion Date: 26-Jun-2009
• Ref Project: EN 3426:2006 - Aerospace series - Groove dimensions for axial mounting external type retaining rings

Overview

EN 3426:2006 is a European aerospace series standard published by CEN (prepared by AECMA‑STAN) that defines groove dimensions for axial mounting, external type retaining rings. The document specifies the geometry and dimensional tolerances required for shaft grooves that accept external axial retaining rings - a critical interface in many aerospace shaft and bearing assemblies. The standard includes a reference figure (showing a square and sharp edge on the bearing side) and a comprehensive table of nominal sizes and related dimensional data.

Key Topics

• Scope: Groove dimensions for axial mounting, external type, retaining rings (external retaining rings on shafts).
• Dimensional data: Table 1 provides nominal diameter codes and key groove parameters (D1, a, D2, M, b, N, R) in millimetres.
• Tolerancing: Notes specify tolerance classes (H11, H12, H13) and when to apply them:
  • H11 when axial load may act in both directions.
  • H13 when axial load acts in one direction only.
• Configuration requirement: Figure 1 identifies the required groove profile detail such as a square/sharp edge on the bearing side.
• Designation: Example format - EN3426-022 (standard number + diameter code from Table 1).

Applications

EN 3426:2006 is directly applicable to the design, manufacture and inspection of shaft grooves used with external axial retaining rings in aerospace and other high-reliability industries. Typical uses include:

• Securing bearings, gears, collars and components on shafts in engines, gearboxes, actuators and landing‑gear linkages.
• Component design and tolerance specification for OEMs and tiered suppliers manufacturing retaining rings and mating shaft parts.
• Quality control and acceptance inspection criteria in production and maintenance of aerospace mechanical assemblies.

Who would use this standard

• Design and mechanical engineers specifying shaft/groove interfaces and selecting retaining rings.
• Manufacturing engineers and machinists producing grooves to aerospace tolerances.
• Suppliers of retaining rings and fasteners who need to match groove geometry.
• Quality assurance and maintenance teams performing inspection and conformity checks.

Related Standards

EN 3426 is part of the aerospace series of fastening/retention standards prepared under AECMA/CEN. Users should consult other aerospace fastener and shaft‑interface standards, national adoptions, and manufacturer specifications for complementary tolerance, material and performance requirements.

Keywords: EN 3426, retaining rings, axial mounting, groove dimensions, external retaining ring, aerospace standard, shaft grooves, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DPHVWLWYLMRLuft-und Raumfahrt - Nuten für axial auf Wellen montierbare Sicherungsringe MaßeSérie aérospatiale - Dimensions des gorges pour anneaux d'arrêt, type extérieur, à montage axialAerospace series - Groove dimensions for axial mounting external type retaining rings49.030.99Drugi vezni elementiOther fastenersICS:Ta slovenski standard je istoveten z:EN 3426:2006SIST EN 3426:2009en,de01-september-2009SIST EN 3426:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3426June 2006ICS 49.030.99 English VersionAerospace series - Groove dimensions for axial mountingexternal type retaining ringsSérie aérospatiale - Dimensions des gorges pour anneauxd'arrêt, type extérieur, à montage axialLuft-und Raumfahrt - Nuten für axial auf Wellenmontierbare Sicherungsringe MaßeThis European Standard was approved by CEN on 20 April 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3426:2006: ESIST EN 3426:2009
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