EN 2336:2005
(Main)Aerospace series - Bearings, spherical plain in steel with assembly slots - Dimensions and loads
Aerospace series - Bearings, spherical plain in steel with assembly slots - Dimensions and loads
This standard specifies the characteristics of spherical plain bearings in steel, with assembly slots, 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 Stahl mit Einführnuten - Maße und Belastungen
Diese Norm legt die Eigenschaften von Gelenklagern aus Stahl mit Einführnuten, mit oder ohne Schmier¬löcher und Schmiernuten fest, die für die Verwendung in starren oder 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 zur allgemeinen 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 avec encoches d'assemblage - Dimensions et charges
La présente norme spécifie les caractéristiques des rotules lisses en acier, avec encoche d'assemblage, avec ou sans trous et rainures de lubrification, 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 z utorom – Mere in nosilnosti
General Information
Relations
Overview
EN 2336:2005 is a European standard developed by CEN that specifies the dimensions, characteristics, and load capabilities of steel spherical plain bearings designed for aerospace applications. These bearings feature assembly slots and can include lubrication holes and grooves to enhance performance and maintenance. Intended primarily for use in fixed or moving aircraft structural parts and control mechanisms, this standard ensures uniformity and reliability within strict temperature and lubrication conditions typical of aerospace environments.
The standard covers bearings that operate effectively over a wide temperature range from -54 °C to 150 °C, with specific grease types recommended for lubrication to optimize performance and durability. Bearings compliant with EN 2336:2005 are designed to meet the high demands of aerospace engineering, providing precise dimensions, load tolerances, and surface treatments that contribute to safety and efficiency in aircraft operation.
Key Topics
Bearing Design and Dimensions
EN 2336 defines exact dimensions for spherical plain bearings in steel with assembly slots, including bore diameters, outside diameters, thicknesses, and other critical measurements expressed in millimeters. These precise specifications ensure interchangeability and performance consistency across aerospace components.Lubrication Features
The standard specifies different configurations of lubrication holes and grooves, identifiable by code letters (E, F, G), which correspond to the presence and location of lubrication features on the bearing rings. It references EN 2337 for recommended greases:- Ester type very high-pressure grease (Code A): -73 °C to 121 °C operating range
- Synthetic hydrocarbon high-pressure grease (Code B): -54 °C to 177 °C operating range
Load and Clearance Specifications
EN 2336 includes permissible static loads (axial and radial) as well as internal clearance limits for various bearing sizes. These parameters guarantee reliable performance under expected mechanical stresses.Material and Surface Treatment
Bearings must be made from aerospace-grade hardened and tempered steel in compliance with EN 2031, with hardness levels specified for inner (60-63 HRC) and outer rings (58-62 HRC). Additionally, an anti-scoring dry-film lubricant coating, per EN 2491, is applied to spherical bearing surfaces to reduce wear and extend service life.Marking and Identification
The standard mandates product marking rules consistent with EN 2424 to ensure clear traceability of bearings through the supply chain and maintenance operations.
Applications
EN 2336:2005 spherical plain bearings are primarily applied in aerospace sectors, where dependable performance under variable and extreme environmental conditions is critical. Typical uses include:
- Aircraft structural joints requiring rotational or oscillating motion
- Control systems and linkages in flight control mechanisms
- Fixed and moving parts subject to high loads within aircraft
- Aerospace equipment requiring high precision and reliable load handling under rigorous temperature and lubrication constraints
By standardizing these bearings, EN 2336 supports enhanced safety, maintenance efficiency, and component interoperability throughout the aerospace supply chain.
Related Standards
Several other standards complement EN 2336:2005 and are referenced within it to establish comprehensive system requirements:
- EN 2337 – Aerospace series: Spherical plain bearings technical specifications, including lubrication guidelines
- EN 2031 – Specifications for hardened and tempered steel bars used in aerospace bearing manufacturing
- EN 2424 – Marking of aerospace products for traceability and quality management
- EN 2491 – Coating methods for molybdenum disulphide dry lubricants applied on bearing surfaces
- ISO 1132-1 – Rolling bearings terminology and tolerances, providing essential definitions for terms used in EN 2336
Together, these standards form a robust framework supporting quality, safety, and performance in aerospace bearing production and application.
Keywords: EN 2336, aerospace bearings, spherical plain bearings, steel bearings, bearing dimensions, bearing loads, aerospace standard, lubrication grooves, aircraft control mechanisms, bearing tolerances, aviation components, aerospace manufacturing standards.
Frequently Asked Questions
EN 2336:2005 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bearings, spherical plain in steel with assembly slots - Dimensions and loads". This standard covers: This standard specifies the characteristics of spherical plain bearings in steel, with assembly slots, 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.
This standard specifies the characteristics of spherical plain bearings in steel, with assembly slots, 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.
EN 2336:2005 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.
EN 2336:2005 has the following relationships with other standards: It is inter standard links to EN 2336:1988/AC1:1988, EN 2336:1988. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 2336:2005 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Bearings, spherical plain in steel with assembly slots - Dimensions and loadsAeronavtika – Ležaji, krogelni, drsni, iz korozijsko odpornega jekla z utorom – Mere in nosilnostiSérie aérospatiale - Rotules lisses en acier avec encoches d'assemblage - Dimensions et chargesLuft- und Raumfahrt - Gelenklager aus Stahl mit Einführnuten - Maße und BelastungenTa slovenski standard je istoveten z:EN 2336:2005SIST EN 2336:2006en49.035ICS:SLOVENSKI
STANDARDSIST EN 2336:200601-september-2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2336December 2005ICS 49.035Supersedes EN 2336:1988
English VersionAerospace series - Bearings, spherical plain in steel withassembly slots - Dimensions and loadsSérie aérospatiale - Rotules lisses en acier avec encochesd'assemblage - Dimensions et chargesLuft- und Raumfahrt - Gelenklager aus Stahl mit Einführnut- Maße und BelastungenThis 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 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, 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© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2336:2005: E
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