EN 2755:2021

SLOVENSKI STANDARD
01-januar-2022
Nadomešča:
SIST EN 2755:2009
Aeronavtika - Kroglasti drsni ležaj iz korozijsko odpornega jekla s samomazalno
oblogo - Serija za večje obremenitve pri okoljski temperaturi - Tehnična
specifikacija
Aerospace series - Bearing, spherical, plain in corrosion resisting steel with self-
lubricating liner - Elevated load at ambient temperature - Technical specification
Luft- und Raumfahrt - Gelenklager, aus korrosionsbeständigem Stahl mit
selbstschmierender Beschichtung - Reihe hohe Belastungen bei Raumtemperatur -
Technische Lieferbedingungen
Série aérospatiale - Rotule, en acier résistant à la corrosion à garniture autolubrifiante -
Série à charge élevée à température ambiante - Spécification technique
Ta slovenski standard je istoveten z: EN 2755:2021
ICS:
49.035 Sestavni deli za letalsko in Components for aerospace
vesoljsko gradnjo construction
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2755
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 49.035 Supersedes EN 2755:2009
English Version
Aerospace series - Bearing, spherical, plain in corrosion
resisting steel with self-lubricating liner - Elevated load at
ambient temperature - Technical specification
Série aérospatiale - Rotule, en acier résistant à la Luft- und Raumfahrt - Gelenklager, aus
corrosion à garniture autolubrifiante - Série à charge korrosionsbeständigem Stahl mit selbstschmierender
élevée à température ambiante - Spécification Beschichtung - Reihe hohe Belastungen bei
technique Raumtemperatur - Technische Lieferbedingungen
This European Standard was approved by CEN on 12 July 2020.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2755:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements characteristics, inspection and test method . 7
5 Quality assurance. 20
5.1 Production qualification . 20
5.2 Acceptance conditions . 20
5.2.1 Inspection and tests to be carried out by the manufacturer . 20
5.2.2 Purchaser’s (user’s) quality control . 20
6 Packaging . 21
7 Certificate of compliance . 21
8 Quality management systems. 28
Annex A (normative) Verification of permissible and ultimate static loads . 29
A.1 Permissible radial static load (C ) . 29
s
A.1.1 Principle . 29
A.1.2 Method . 29
A.2 Ultimate radial static load . 29
A.2.1 Principle . 29
A.2.2 Method . 29
A.3 Permissible axial static load (C ) . 30
a
A.3.1 Principle . 30
A.3.2 Method . 30
A.4 Ultimate axial static load . 30
A.4.1 General . 30
A.4.2 Principle . 30
A.4.3 Method . 30
Annex B (normative) Verification of dynamic radial load (C ) . 33
B.1 Principle . 33
B.2 Method . 33
B.2.1 Testing at ambient temperature . 33
B.2.2 Testing at low temperature . 33
B.2.3 Testing at elevated temperature . 33
B.2.4 Test at ambient temperature after immersion . 34
Annex C (normative) Fluids — Essential characteristics . 35
C.1 Fuel for turbine aero engine . 35
C.2 Fluids for de-icing circuit . 35
C.3 Hydraulic fluids . 35
C.3.1 Mineral fluid for hydraulic transmission . 35
C.3.2 Phosphate of ester hydraulic fluid . 36
C.4 De-icing and anti-icing fluids . 36
Annex D (normative) Measurement of the peel strength of the liner . 37
D.1 Principle . 37
D.2 Method . 37
Annex E (normative) Simplified qualification procedure . 39
E.1 Rules for application . 39
E.1.1 General . 39
E.2 Choice of references . 39
E.3 Rules for qualification . 40
E.4 Plain bearing distribution . 41
Bibliography . 43

European foreword
This document (EN 2755:2021) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-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
ASD-ASD, 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 May 2022, and conflicting national standards shall be
withdrawn at the latest by May 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 2755:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
1 Scope
This document specifies the required characteristics, inspection and test methods, qualification and
acceptance conditions for a spherical plain bearing in corrosion resisting steel, with self-lubricating
liner, for elevated loads at ambient temperature intended for use in fixed or moving parts of the aircraft
structure and control mechanisms.
This document applies whenever referenced.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2064, Aerospace series — Bearings, spherical plain in corrosion resisting steel with self-lubricating
liner — Technical specification
EN 2584, Aerospace series — Bearings, spherical plain in corrosion resisting steel with self-lubricating
liner — Narrow series — Elevated loads at ambient temperature — Dimensions and loads
EN 2585, Aerospace series — Bearing, spherical plain in corrosion resisting steel with self-lubricating
liner — Wide series — Elevated load at ambient temperature — Dimensions and loads
EN 3048, Aerospace series — Bearings, spherical plain in corrosion resisting steel with self-lubricating
liner — Light series — Elevated load at ambient temperature — Dimensions and loads
EN 4037, Aerospace series — Bearings, spherical plain in corrosion resisting steel with self-lubricating
liner, reduced start
...