Aerospace series - Rings retaining, external, axial mounting, steel, phosphated

This European Standard defines the characteristics of axial mounting external retaining rings, in steel, phosphated, for aerospace applications.
The phosphating restricts the use at temperatures not exceeding 200 °C.

Luft- und Raumfahrt - Sicherungsringe, axial auf Wellen montierbar, aus Stahl, phosphatiert

Diese Norm legt die Merkmale von axial auf Wellen montierbaren Sicherungsringen aus Stahl mit
Phosphatbeschichtung zur Anwendung in der Luft- und Raumfahrt fest.
Die Phosphatbeschichtung beschränkt die Verwendung auf Temperaturen von nicht mehr als 200 °C.

Série aérospatiale - Anneaux d’arrêt, à montage axial, type extérieur, en acier, phosphatés

La présente Norme Européenne définit les caractéristiques des anneaux d’arrêt, à montage axial, type extérieur, en acier, phosphatés pour applications aérospatiales.
La phosphatation limite l’utilisation à des températures ne dépassant pas 200 °C.

Aeronavtika - Varnostni obroči za zunanjo osno pritrditev, jekleni, fosfatirani

Ta standard določa lastnosti jeklenih fosfatiranih varnostnih obročev za zunanjo osno pritrditev v okrogle odprtine za uporabo v aeronavtiki. Fosfatiranje omejuje uporabo na temperature, ki ne presegajo 200 °C.

General Information

Status
Published
Publication Date
27-Mar-2012
ICS
49.030.50 - Washers and other locking elements
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
23-Mar-2012
Due Date
28-May-2012
Completion Date
28-Mar-2012
Ref Project
EN 3384:2012 - Aerospace series - Rings retaining, external, axial mounting, steel, phosphated

Overview

SIST EN 3384:2012 is a European Standard developed by the European Committee for Standardization (CEN) that specifies the characteristics and requirements for axial mounting external retaining rings made of steel with phosphated surface treatment, specifically designed for aerospace applications. These retaining rings are critical components used to axially secure bearings, gears, and other machine parts on shafts, ensuring reliable mechanical fixation in aerospace assemblies.

The phosphating treatment provides corrosion resistance but limits the use of these retaining rings to environments where temperatures do not exceed 200 °C. This standard harmonizes dimensions, materials, surface treatments, and technical specifications to facilitate interchangeability and ensure consistent performance across the aerospace industry.

Key Topics

  • Scope and Application
    SIST EN 3384:2012 covers axial mounting external retaining rings in phosphated steel tailored for aerospace uses. It sets dimensional, material, and surface treatment requirements for retaining rings that mount externally on shafts and hold components in place axially.

  • Material Specifications
    Retaining rings must be manufactured from spring steel with specified hardness values:

    • Diameter codes 008 to 038: 480–530 HV
    • Diameter codes 040 to 165: 440–510 HV

  • Surface Treatment
    Rings undergo phosphate coating according to EN 2793, class A, providing corrosion resistance. After phosphating, rings must be protected with grease or oil during storage.

  • Dimensional Requirements
    Detailed dimensional tables and figures specify parameters such as ring diameter, thickness, groove dimensions, and mass, ensuring compatibility and secure fit on shafts following aerospace industry norms.

  • Designation and Marking
    The standard defines a clear system to designate retaining rings based on the EN standard number and diameter code (e.g., EN 3384 – 016), facilitating identification, procurement, and traceability. Marking complies with EN 2424 guidelines, ensuring consistent product labeling.

  • Supporting Standards
    EN 3384 references related standards for groove dimensions (EN 3426), technical specifications for retaining rings (EN 3380), and product marking (EN 2424) to provide a complete regulatory framework.

Applications

  • Aerospace Industry
    These retaining rings are extensively used in aerospace component assemblies including engine parts, landing gear, actuators, and control systems requiring axial fixation of components on shafts.

  • Precision Mechanical Assemblies
    Their standardized dimensions and material properties make them ideal for critical, high-reliability aerospace mechanisms where secure axial mounting is vital.

  • Temperature-Restricted Environments
    With a temperature limit of 200 °C due to phosphating, these rings suit aircraft components exposed to moderate thermal conditions but not high-temperature engine zones.

  • Corrosion Resistance Requirement
    Phosphated surface treatment ensures enhanced resistance against corrosion, critical for aerospace applications exposed to varying atmospheric conditions.

Related Standards

  • EN 3380: Aerospace series - Rings retaining - Technical specification
    Provides comprehensive technical specifications applicable to various types of aerospace retaining rings.

  • EN 3426: Aerospace series - Groove dimensions for axial mounting external retaining rings
    Specifies precise groove size requirements to ensure proper installation and retention of retaining rings.

  • EN 2424: Aerospace series - Marking of aerospace products
    Defines marking procedures for aerospace components to support part identification and traceability.

  • EN 2793: Phosphate coatings - Specifications
    Details the class A phosphate treatment relevant to the surface protection of steel retaining rings.

For aerospace manufacturers, engineers, and quality assurance specialists, adherence to SIST EN 3384:2012 ensures that axial mounting external retaining rings meet stringent quality, performance, and safety requirements. This standard facilitates international compatibility, reduces part variability, and supports the reliable functioning of aerospace systems.

Frequently Asked Questions

SIST EN 3384:2012 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Rings retaining, external, axial mounting, steel, phosphated". This standard covers: This European Standard defines the characteristics of axial mounting external retaining rings, in steel, phosphated, for aerospace applications. The phosphating restricts the use at temperatures not exceeding 200 °C.

This European Standard defines the characteristics of axial mounting external retaining rings, in steel, phosphated, for aerospace applications. The phosphating restricts the use at temperatures not exceeding 200 °C.

SIST EN 3384:2012 is classified under the following ICS (International Classification for Standards) categories: 49.030.50 - Washers and other locking elements. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 3384:2012 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Sicherungsringe, axial auf Wellen montierbar, aus Stahl, phosphatiertSérie aérospatiale - Anneaux d’arrêt, à montage axial, type extérieur, en acier, phosphatésAerospace series - Rings retaining, external, axial mounting, steel, phosphated49.030.50Podložke in drugi blokirni elementiWashers and other locking elementsICS:Ta slovenski standard je istoveten z:EN 3384:2012SIST EN 3384:2012en01-maj-2012SIST EN 3384:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3384
March 2012 ICS 49.030.50 English Version
Aerospace series - Rings retaining, external, axial mounting, steel, phosphated
Série aérospatiale - Anneaux d'arrêt, à montage axial, type extérieur, en acier, phosphatés
Luft- und Raumfahrt - Sicherungsringe, axial auf Wellen montierbar, aus Stahl, phosphatiert This European Standard was approved by CEN on 24 September 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3384:2012: ESIST EN 3384:2012
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...