SIST EN 2335:2006

Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads

This standard specifies the characteristics of spherical plain bearings in corrosion resisting steel, without assembly slot, with or without swaging groove, with or without lubrication holes and grooves, intended for use in fixed or moving parts of aircraft structure and control mechanisms.
They may be used in the temperature range from - 54 °C to 150 °C.
However, as they are lubricated with the following greases (see EN 2337):
-   ester type very high pressure grease (code letter A), operating range from - 73 °C to 121 °C or,
-   synthetic hydrocarbon 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 grease code letter A is limited to 121 °C.

Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl ohne Einführnut - Maße und Belastungen

Diese Norm legt die Eigenschaften von Gelenklagern aus korrosionsbeständigem Stahl ohne Einführnut, mit oder ohne Montagenut, mit oder ohne Schmierlöcher und Schmiernuten fest, die für die Verwendung in starren und beweglichen Flugwerkteilen und deren Betätigungsmechanismen bestimmt sind.
Sie sind im Temperaturbereich von  54 °C bis 150 °C verwendbar.
Da sie jedoch mit folgenden Fetten geschmiert werden (siehe EN 2337):
-   Hochdruckfett auf Esterbasis (Kennbuchstabe A), Betriebstemperaturbereich  73 °C bis 121 °C, oder
-   Hochdruckfett auf der Basis von synthetischen Kohlenwasserstoffen für allgemeine Verwendung (Kennbuchstabe B), Betriebstemperaturbereich  54 °C bis 177 °C,
ist ihr Anwendungsbereich bei Schmierung mit Fett A auf 121 °C eingeschränkt.

Série aérospatiale - Rotules lisses en acier résistant a la corrosion sans encoche d'assemblage - Dimensions et charges

La présente norme spécifie les caractéristiques des rotules lisses en acier résistant à la corrosion sans encoche d'assemblage, avec ou sans trous et rainures de lubrification, avec ou sans gorge de sertissage, destinées à être utilisées dans les éléments fixes ou mobiles de la structure des aéronefs et de leurs mécanismes de commande.
Elles peuvent être utilisées dans l'intervalle de température de - 54 °C à + 150 °C.
Cependant, comme ils sont lubrifiés avec les graisses suivantes (voir EN 2337) :
-   graisse extrême pression, type ester (code A) plage d'utilisation  73 °C à 121 °C ou,
-   graisse extrême pression, type aux hydrocarbures synthétiques, usage général, plage d'utilisation de - 54 °C à 177 °C.
Leur domaine d'application dans le cas de lubrification avec la graisse cade a est limité à 121 °C.

Aeronavtika – Ležaji, krogelni, drsni, iz korozijsko odpornega jekla brez utora – Mere in nosilnosti

General Information

• Status: Published
• Publication Date: 31-Aug-2006
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2006
• Due Date: 01-Sep-2006
• Completion Date: 01-Sep-2006
• Ref Project: EN 2335:2005 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads

Relations

• Replaces: SIST EN 2335:2001 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads
• Effective Date: 01-Sep-2006
• Replaces: SIST EN 2335:2001/AC1:2001 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads
• Effective Date: 01-Sep-2006
• Refers: SIST EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: SIST EN 13522:2004 - Footwear - Test methods for uppers - Tensile strength and elongation
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: SIST-TS CEN/TS 13130-12:2005 - Material and articles in contact with foodstuffs - Plastics substances subject to limitation - Part 12: Determination of 1,3-benzenedimethanamine in food simulants
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2337:2009 - Aerospace series - Spherical plain bearings - Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 6099:2021 - Aerospace series - Rod-end, spherical, plain bearing, metal to metal - Technical specification
• Effective Date: 28-Jan-2026

Overview

SIST EN 2335:2006 defines the technical specifications for spherical plain bearings made from corrosion resisting steel, designed without assembly slots. These aerospace-grade bearings, with optional swaging grooves and lubrication features, are essential components in fixed or moving parts of aircraft structures and control mechanisms. Applicable within a temperature range from -54 °C to 150 °C, their performance is closely tied to the type of lubrication grease specified, adhering to standards for high operational reliability in demanding environments.

This standard, issued by the Slovenian Institute for Standardization (SIST), aligns with European requirements and ensures compatibility across aerospace applications, emphasizing uniformity in dimensions, load ratings, and material treatments for optimal performance and safety.

Keywords: spherical plain bearings, corrosion resisting steel, aerospace bearings, bearing dimensions, static loads, aircraft components, SIST EN 2335

Key Topics

• Material Specifications:
  Bearings are constructed from corrosion-resistant steel, ensuring durability and resistance to harsh operational conditions.

• Design Variants:
  Components covered include options with or without swaging grooves and lubrication holes/grooves, providing flexibility for different assembly and maintenance needs.

• Lubrication Compatibility:
  Bearings can be lubricated with either ester-type (code letter A) or synthetic hydrocarbon-type (code letter B) high-pressure greases, each with specific temperature operational ranges. The correct grease selection is vital for ensuring bearing longevity and operational safety.

• Temperature Range:
  Bearings are qualified for use from -54 °C to 150 °C. When using ester-type grease, the operational temperature is limited to 121 °C, while synthetic hydrocarbon grease allows usage up to 177 °C.

• Dimensional and Load Requirements:
  The standard specifies precise dimensions and permissible static loads, ensuring predictable fit and performance in aerospace assemblies.

• Surface Treatments:
  Requirements for surface treatments such as passivation and dry-film lubricants are specified, contributing to enhanced wear resistance and antiscoring properties.

Applications

• Aircraft Structure and Control Mechanisms:
  These spherical plain bearings are used in both fixed and actuated elements in airframes, including flight control linkages, landing gear assemblies, and other mechanisms requiring angular movement under load.

• Maintenance and Replacement:
  Uniform specifications facilitate streamlined maintenance, part replacement, and supply chain standardization, ensuring safety and reducing downtime in aerospace operations.

• High-performance Environments:
  The combination of corrosion-resistant materials and adaptable lubrication solutions allows these bearings to perform reliably under varying environmental and operational stresses encountered in aviation.

Related Standards

• EN 2337: Aerospace series - Spherical plain bearings - Technical specification. Outlines technical specifications referenced for lubrication and other details.
• ISO 1132-1: Rolling bearings – Tolerances – Part 1: Terms and definitions. Defines relevant terminology and tolerances.
• EN 2030: Steel FE-PM43 – Hardened and tempered – Aerospace series. Relates to the material requirements for bearing inner rings.
• EN 2491: Aerospace series – Molybdenum disulphide dry lubricants – Coating methods. Explains dry-film lubricant application for bearing surfaces.
• ISO 8075: Aerospace – Surface treatment of hardenable stainless steel parts. Specifies passivation treatments.
• EN 2424: Aerospace series – Marking of aerospace products. Provides marking guidance for traceability.
• EN 3161, EN 3490: Standards for steels used in outer bearing rings.

Practical Value

By following SIST EN 2335:2006, aerospace manufacturers and maintenance organizations ensure precise fit, optimal load capacity, and long-term corrosion resistance for critical moving and stationary parts in aircraft. The standard’s alignment with broader European and international references guarantees interoperability, safety, and high performance in the aerospace industry.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2006
Aeronavtika – Ležaji, krogelni, drsni, iz korozijsko odpornega jekla brez utora –
Mere in nosilnosti
Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly
slot - Dimensions and loads
Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl ohne Einführnut -
Maße und Belastungen
Série aérospatiale - Rotules lisses en acier résistant a la corrosion sans encoche
d'assemblage - Dimensions et charges
Ta slovenski standard je istoveten z: EN 2335:2005
ICS:
49.035
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2335
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 49.035 Supersedes EN 2335:1988
English Version
Aerospace series - Bearings, spherical plain in corrosion
resisting steel without assembly slot - Dimensions and loads
Série aérospatiale - Rotules lisses en acier résistant à la Luft- und Raumfahrt - Gelenklager aus
corrosion sans encoche d'assemblage - Dimensions et korrosionsbeständigem Stahl ohne Einführnut - Maße und
charges Belastungen
This European Standard was approved by CEN on 26 October 2005.
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 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 translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
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, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2335:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions.4
4 Symbols and abbreviations.5
5 Required characteristics.5
6 Designation.9
7 Marking.9
8 Technical specification.9

Foreword
This European Standard (EN 2335:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This European Standard supersedes EN 2335:1988.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
1 Scope
This standard specifies the characteristics of spherical plain bearings in corrosion resisting steel, without
assembly slot, with or without swaging groove, with or without lubrication holes and grooves, intended for use
in fixed or moving parts of aircraft structure and control mechanisms.
They may be used in the temperature range from – 54 °C to 150 °C.
However, as they are lubricated with the following greases (see EN 2337):
 ester type very high pressure grease (code letter A), operating range from – 73 °C to 121 °C or,
 synthetic hydrocarbon 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 grease code letter A is limited to 121 °C.
2 Normative references
The following referenced documents are indispensable for the application of this documen
...