EN 3060:2007

Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel, cadmium plated, with flanged alignment housing, cadmium plated - Dimensions and loads

This standard specifies the characteristics of rigid single row ball bearings in steel, cadmium-plated with cadmium plated flanged alignment housing designed to withstand only slow rotations and oscillations under load.
They are intended for use in the hubs of torsion lever and in separated supports for airframe/aerospace applications.
The airframe rolling bearings defined in this standard may be used in the temperature range from - 54 °C to 150 °C.
However, being lubricated with the following greases (see EN 3727):
   ester type very high pressure grease (code letter A), operating range from - 73 °C to 121 °C or,
   synthetic hydrocarbons type very high pressure grease general purpose (code letter B) operating range from - 54 °C to 177 °C.
Their field of application when lubricated with code letter A grease is limited to 121 °C.

Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus Stahl, verkadmet, mit selbsteinstellendem Flansch, verkadmet - Maße und Belastungen

Diese Norm legt die Eigenschaften von einreihigen Rillenkugellagern aus Stahl, verkadmet, mit verkadmetem, selbsteinstellendem Flansch fest, die so ausgelegt sind, dass sie unter Belastung nur langsamen Dreh- und Schwenkbewegungen standhalten.
Sie sind zur Verwendung in Naben von torsionsbeanspruchten Umlenkgetrieben und in getrennten Stützlagern vorgesehen.
Die in der vorliegenden Norm festgelegten Flugwerklager sind im Temperaturbereich von -54 C bis 150 C zu verwenden.
Da sie jedoch mit folgenden Fetten geschmiert werden (siehe EN 3727):
   Hochdruckfett auf Esterbasis (Kennbuchstabe A), Betriebstemperaturbereich -73 C bis 121 C, oder
   Hochdruckfett auf der Basis von synthetischen Kohlenwasserstoffen zur allgemeinen Verwendung (Kennbuchstabe B), Betriebstemperaturbereich -54 C bis 177 C,
ist ihr Anwendungsbereich für Schmierung mit Fett A auf 121 C eingeschränkt

Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, cadmiés, rigides, à une rangée de billes, avec bague d'alignement à collerette cadmiée - Dimensions et charges

Aeronavtika - Kotalni ležaji za letala - Enoredni žlebasti kroglični ležaji iz jekla, prevlečeni s kadmijem, s samonastavljivo prirobnico, prevlečeno s kadmijem - Mere in nosilnosti

General Information

• Status: Published
• Publication Date: 19-Jun-2007
• Withdrawal Date: 30-Dec-2007
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 30-Jun-2017
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 3060:2009 - Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel, cadmium plated, with flanged alignment housing, cadmium plated - Dimensions and loads

Overview

EN 3060:2007 is a European Standard published by CEN that specifies the characteristics, dimensions, and load capacities of rigid single row ball bearings used in aerospace applications. These bearings are made of steel with cadmium plating and include a flanged alignment housing, also cadmium plated. Designed specifically for airframe rolling components, they accommodate slow rotations and oscillations under load and are used primarily in torsion lever hubs and separated supports within airframe assemblies.

The standard ensures reliable performance within a wide temperature range (-54 °C to 150 °C), making it suitable for the demanding environmental conditions of aerospace operations. When lubricated with specified greases, these bearings maintain optimal functionality and durability aligned with aerospace industry requirements.

Key Topics

• Bearing Type and Design

  • Rigid single row ball bearings
  • Steel material with cadmium plating for corrosion resistance
  • Flanged alignment housing, also cadmium plated, available in solid or lightweight variants
  • Options for seals or shields as protective elements

• Dimensional and Load Specifications

  • Detailed dimensional tolerances ensuring precise fit and performance
  • Static permissible axial and radial load values specified for various bearing sizes and housing types
  • Internal clearances and runout tolerances critical for operational reliability
  • Tight control on surface roughness for raceways, bore, and housing interfaces to ensure smooth operation

• Material and Surface Treatments

  • Steel types conforming to aerospace-grade standards (e.g., EN 2031, EN 2221) with hardness between 59 HRC and 64 HRC
  • Cadmium plating thickness between 5 µm to 20 µm on rings and 10 µm to 20 µm on housing for enhanced corrosion protection
  • Post-plating de-embrittlement heat treatment required for durability

• Operating Conditions and Lubrication

  • Temperature range: -54 °C to 150 °C (with lubrication limits)
  • Lubrication types in accordance with EN 3727:
    • Ester-type very high-pressure grease (code A), operational to 121 °C
    • Synthetic hydrocarbons type very high-pressure grease (code B), operational to 177 °C
  • Bearings intended for slow rotations and oscillatory motions under load

• Marking and Identification

  • Marking requirements based on EN 2424 ensuring traceability
  • Designation codes include bearing size, housing type, lubrication grease code, and sealing option

Applications

EN 3060 bearings are specifically engineered for airframe and aerospace rolling element requirements, including:

• Aircraft Torsion Lever Hubs
  Bearings accommodate slow, oscillatory motion critical to torsion lever mechanisms in aircraft structures, ensuring precise and durable performance over operational lifespan.

• Separated Airframe Support Structures
  The robust design and flanged alignment housing provide secure installations for separated support bearings in aerospace assemblies, maintaining alignment under load.

• Temperature-Variable Aerospace Environments
  The bearings’ ability to function within extreme temperature ranges makes them suitable for flight conditions involving significant temperature gradients, from high-altitude cold environments to warmer operational scenarios.

• High-Corrosion Resistance Requirements
  Cadmium plating combined with specified greases ensures protection against corrosion, vital for aerospace components exposed to diverse atmospheric conditions.

Related Standards

For comprehensive application and integration of EN 3060 bearings, the following standards are closely related and referenced:

• EN 3727 – Defines technical specifications for airframe rolling bearings with flanged alignment housings, including lubrication requirements.
• EN 2133 – Aerospace series standard for cadmium plating on steels and alloys, essential for corrosion protection of bearing components.
• EN 2031, EN 2221, EN 2222 – Specify materials and treatment processes for aerospace-grade steels used in bearing rings and balls.
• EN 2249 – Details material specifics for steel used in flanged alignment housings.
• EN 2424 – Provides marking guidance for aerospace products, ensuring uniformity and traceability across components.
• ISO 1132-1 – Covers rolling bearing terminologies and tolerances.
• TR 4475 – Aerospace vocabulary related to bearings and mechanical transmissions to standardize technical language.

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EN 3060:2007 offers a critical benchmark for aerospace bearing manufacturers and users, defining stringent requirements for quality, performance, and durability. Implementing this standard ensures that airframe rolling bearings reliably support key aircraft functions under the demanding conditions typical of aerospace environments.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus Stahl, verkadmet, mit selbsteinstellendem Flansch, verkadmet - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier, cadmiés, rigides, à une rangée de billes, avec bague d'alignement à collerette cadmiée - Dimensions et chargesAerospace series - Bearings, airframe rolling - Rigid single row ball bearings in steel, cadmium plated, with flanged alignment housing, cadmium plated - Dimensions and loads49.035Sestavni deli za letalsko in vesoljsko gradnjoComponents for aerospace constructionICS:Ta slovenski standard je istoveten z:EN 3060:2007SIST EN 3060:2009en,de01-september-2009SIST EN 3060:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3060June 2007ICS 49.035 English VersionAerospace series - Bearings, airframe rolling - Rigid single rowball bearings in steel, cadmium plated, with flanged alignmenthousing, cadmium plated - Dimensions and loadsSérie aérospatiale - Roulements pour structures d'aéronefs- Roulements en acier, cadmiés, rigides, à une rangée debilles, avec bague d'alignement à collerette cadmiée -Dimensions et chargesLuft- und Raumfahrt - Flugwerklager - EinreihigeRillenkugellager aus Stahl, verkadmet, mitselbsteinstellendem Flansch, verkadmet - Maße undBelastungenThis 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 3060:2007: ESIST EN 3060:2009
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