Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance - Dimensions and loads

This standard specifies the characteristics of self-aligning double row ball bearings with flanged outer ring in corrosion resisting steel, reduced internal clearance, designed to withstand only slow rotations and oscillations under load.
They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms.
They are intended to be used in the temperature range: - 54 °C to 150 °C.
However, being lubricated with the following greases:
   very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or
   very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280),
their field of application when lubricated with code A grease is limited to 121 °C.

Luft- und Raumfahrt - Flugwerklager - Zweireihige Pendelkugellager aus korrosionsbeständigem Stahl mit Flanschaußenring, reduzierte radiale Lagerluft - Maße und Belastungen

Diese Norm legt die Eigenschaften von zweireihigen Pendelkugellagern mit Flanschaußenring aus korrosions¬beständigem Stahl mit reduzierter radialer Lagerluft fest, die so ausgelegt sind, dass sie unter Belastung nur lang¬samen Dreh- und Schwenkbewegungen standhalten.
Sie sind zur Verwendung zwischen starren und beweglichen Flugwerkteilen und deren Betätigungs¬einrichtungen bestimmt.
Sie sind für den Einsatz im Temperaturbereich von -54° C bis 150° C bestimmt.
Da sie jedoch mit folgenden Fetten geschmiert werden:
   Hochdruckfett auf Esterbasis (Kennbuchstabe A), Betriebstemperaturbereich -73° C bis 121° C oder
   Hochdruckfett auf der Basis von synthetischen Kohlenwasserstoffen zur allgemeinen Verwendung (Kenn¬buch¬stabe B), Betriebstemperaturbereich -54° C bis 177° C (siehe EN 3280),
ist ihr Anwendungsbereich bei Schmierung mit Fett mit dem Kennbuchstaben A auf 121° C eingeschränkt.

Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier résistant à la corrosion, sur deux rangées de billes, avec bague extérieure à collerette, jeu radial réduit - Dimensions et charges

Aeronavtika - Kotalni ležaji za letala - Dvoredni nihalni kroglični ležaji s prirobnico na zunanjem obroču, iz korozijsko odpornega jekla, z zmanjšanim radialnim ohlapom ležaja - Mere in nosilnosti

General Information

Status
Published
Publication Date
14-May-2009
ICS
49.035 - Components for aerospace construction
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Apr-2009
Due Date
20-Jun-2009
Completion Date
15-May-2009
Ref Project
EN 4034:2007 - Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance - Dimensions and loads

Overview

SIST EN 4034:2009 is a European aerospace standard developed by CEN that specifies the dimensions, loads, and key characteristics of double row self-aligning ball bearings with flanged outer rings. These bearings are manufactured from corrosion-resisting steel and feature a reduced internal radial clearance. Designed specifically for slow rotations and oscillating movements, these bearings are critical components in aircraft structures and their control mechanisms. The standard ensures these bearings perform reliably within a temperature range from –54 °C to 150 °C, with limitations based on the type of grease lubrication used.

Key Topics

  • Bearing Type: Double row self-aligning ball bearings with flanged outer ring
  • Materials:
    • Bearing rings and balls made from corrosion-resistant steel (EN 2030 or EN 2226), hardened to ≥ 58 HRC
    • Shields made from corrosion resisting materials
    • Seals constructed from PTFE or PTFE reinforced with glass fabric
  • Dimensions and Tolerances: Precise dimensional tolerances for bore diameter, outer diameter, width, and radial clearance are defined to ensure interchangeability and correct fit.
  • Surface Roughness: Rolling elements and raceways must maintain a surface roughness of Ra = 0.2 µm; other surfaces have a Ra = 0.8 µm requirement.
  • Lubrication:
    • Very high pressure ester-based grease (Code A), operative between –73 °C and 121 °C
    • Very high pressure synthetic hydrocarbon grease (Code B), operative between –54 °C and 177 °C
  • Load Capacities: Specifies maximum permissible static radial and axial loads, starting torques, and swiveling torque limits tailored for aerospace applications.
  • Operating Conditions: Bearings are suitable for slow oscillating and rotational loads within aerospace structures, handling extremes of temperature while maintaining performance and reliability.
  • Marking and Designation: Standardized marking per EN 2424 is recommended, aiding traceability and quality assurance.

Applications

SIST EN 4034:2009 bearings are predominantly used in the aerospace sector where high reliability, corrosion resistance, and precise dimensional control are essential. Typical applications include:

  • Aircraft Airframe Structures: Allowing movement between fixed and movable parts with low friction and smooth oscillation.
  • Control Mechanisms: Supporting critical control linkages that require bearings capable of handling slow rotations under variable loads.
  • Low-Speed Oscillatory Systems: Ideal for aerospace systems where slow, repetitive motion needs durable, corrosion-resistant bearing solutions.
  • Harsh Environmental Conditions: Bearings compliant with this standard perform reliably across wide temperature ranges and under lubrication constraints, essential for aerospace environments exposed to extremes.

Related Standards

  • EN 3280: Aerospace series - Bearings, airframe rolling, rigid or self-aligning - Technical specification. Provides broader technical requirements related to airframe rolling bearings used alongside EN 4034.
  • EN 2424: Aerospace marking standard that details how aerospace products, including bearings, should be marked to comply with traceability and regulatory requirements.
  • ISO 1132-1: Defines rolling bearing tolerances, essential for understanding terms and measurement criteria applied in EN 4034.
  • ISO 8075: Covers surface treatment processes for hardenable stainless steel parts, relevant for finishing aerospace bearing components.
  • EN 2030 / EN 2226: Specifications for steel grades and treatment relevant to bearing rings and balls in aerospace applications.

Keywords: aerospace bearings, self-aligning ball bearings, corrosion resistant steel bearings, double row bearings, aerospace rolling bearings, airframe bearings, radial clearance, aircraft control mechanisms, high-performance bearings, EN 4034 aerospace standard, CEN aerospace standards.

Frequently Asked Questions

SIST EN 4034:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance - Dimensions and loads". This standard covers: This standard specifies the characteristics of self-aligning double row ball bearings with flanged outer ring in corrosion resisting steel, reduced internal clearance, designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. They are intended to be used in the temperature range: - 54 °C to 150 °C. However, being lubricated with the following greases: very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280), their field of application when lubricated with code A grease is limited to 121 °C.

This standard specifies the characteristics of self-aligning double row ball bearings with flanged outer ring in corrosion resisting steel, reduced internal clearance, designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. They are intended to be used in the temperature range: - 54 °C to 150 °C. However, being lubricated with the following greases: very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280), their field of application when lubricated with code A grease is limited to 121 °C.

SIST EN 4034:2009 is classified under the following ICS (International Classification for Standards) categories: 49.035 - Components for aerospace construction. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4034:2009 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.DGLDOQLPLuft- und Raumfahrt - Flugwerklager - Zweireihige Pendelkugellager aus korrosionsbeständigem Stahl mit Flanschaußenring, reduzierte radiale Lagerluft - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier résistant à la corrosion, sur deux rangées de billes, avec bague extérieure à collerette, jeu radial réduit - Dimensions et chargesAerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance - Dimensions and loads49.035Sestavni deli za letalsko in vesoljsko gradnjoComponents for aerospace constructionICS:Ta slovenski standard je istoveten z:EN 4034:2007SIST EN 4034:2009en,de01-julij-2009SIST EN 4034:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4034June 2007ICS 49.035 English VersionAerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosionresisting steel, reduced internal radial clearance - Dimensionsand loadsSérie aérospatiale - Roulements pour structures d'aéronefs- Roulements en acier résistant à la corrosion, sur deuxrangées de billes, avec bague extérieure à collerette, jeuradial réduit - Dimensions et chargesLuft- und Raumfahrt - Flugwerklager - Kugellager auskorrosionsbeständigem Stahl Zweireihige Pendelkugellagermit Flanschaußenring, reduzierte radiale Lagerluft - Maßeund BelastungenThis European Standard was approved by CEN on 16 March 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 CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4034:2007: ESIST EN 4034:2009
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