SIST EN 4854-1:2020

Aerospace series - Bearing, spherical plain, in corrosion resisting steel with self-lubricating liner, low starting torque and low friction coefficient, elevated duty cycles under low oscillations at different operating conditions, narrow series - Part 1: Dimensions and loads for narrow series

This European standard specifies the characteristics of spherical plain bearings in corrosion resisting steel with self-lubricating liner, low starting torque and low friction coefficient, elevated duty cycles under low oscillations at different operating conditions, narrow series for aerospace applications.
These self-lubricating spherical plain bearings are intended for use in fixed or moving parts of the aircraft structure especially for control mechanism and operating systems. The bearings are designed to be subjected under low dynamic radial loads and slow rotations in the temperature range of −55°C to 120 °C (−67°F to 248 °F).

Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl mit selbstschmierender Beschichtung, geringem Losbrechmoment und niedrigem Reibungskoeffizient, hohe Anzahl an gering oszillierenden Belastungszyklen bei unterschiedlichen Einsatzbedingungen, schmale Reihe - Teil 1: Maße und Belastungen

Diese Europäische Norm legt die Eigenschaften von Gelenklagern aus korrosionsbeständigem Stahl mit selbstschmierender Beschichtung, niedrigem Anlaufmoment und niedrigem Reibungskoeffizienten, einer hohen Anzahl an gering oszillierenden Belastungszyklen bei unterschiedlichen Einsatzbedingungen der schmalen Baureihe für die Anwendung in der Luft- und Raumfahrt fest.
Diese Gelenklager mit selbstschmierender Beschichtung sind für den Einsatz  in starren oder beweglichen Teilen der Luftfahrzeugstruktur, speziell für Steuerungsmechanismen und Bediensysteme vorgesehen. Die Lager sind so ausgelegt, dass sie dynamischen Radialbelastungen und langsamen Drehungen im Temperatur¬bereich von −55 °C bis 120 °C (−67 °F bis 248 °F) widerstehen können.

Série aérospatiale - Rotules lisses en acier résistant à la corrosion à garniture autolubrifiante, faible couple de démarrage et faible coefficient de frottement, cycles d'endurance élevés sous faibles oscillations à différentes conditions de fonctionnement, série étroite - Partie 1 : Dimensions et charges

Le présent document spécifie les caractéristiques des rotules lisses en acier résistant à la corrosion à garniture autolubrifiante, faible couple de démarrage et faible coefficient de frottement, cycles d'endurance élevés sous faibles oscillations à différentes conditions de fonctionnement, série étroite, pour applications aérospatiales.
Ces rotules lisses autolubrifiantes sont destinées à être utilisées dans les parties fixes ou mobiles de la structure de l’aéronef, particulièrement pour les mécanismes de commande et les systèmes d’actionnement. Les rotules sont conçues pour être soumises à de faibles charges radiales dynamiques et à des rotations lentes dans une plage de températures de −55 °C à 120 °C (−67 °F à 248 °F).

Aeronavtika - Kroglasti drsni ležaj iz korozijsko odpornega jekla s samomazalno oblogo, z majhnim začetnim navorom in majhnim tornim količnikom, povišanimi delovnimi cikli pri nizkih oscilacijah v različnih obratovalnih pogojih, omejena serija - 1. del: Mere in nosilnosti za ozki tip

Ta dokument določa značilnosti kroglastih drsnih ležajev iz korozijsko odpornega jekla s samomazalno oblogo, majhnim začetnim navorom in majhnim tornim količnikom ter povišanimi delovnimi cikli pri nizkih nihanjih v različnih obratovalnih pogojih, omejena serija. Ti samomazalni kroglasti drsni ležaji so namenjeni za uporabo v fiksnih ali premikajočih se delih ogrodja letala, predvsem za nadzorne mehanizme in operacijske sisteme. Ležaji so zasnovani za nizke dinamične radialne obremenitve in počasne rotacije v temperaturnem razponu od –55°C do 120 °C (od –67°F do 248 °F).

General Information

• Status: Published
• Publication Date: 17-Nov-2019
• ICS: 21.100.10 - Plain bearings
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Nov-2019
• Due Date: 09-Jan-2020
• Completion Date: 18-Nov-2019
• Ref Project: EN 4854-1:2019 - Aerospace series - Bearing, spherical plain, in corrosion resisting steel with self-lubricating liner, low starting torque and low friction coefficient, elevated duty cycles under low oscillations at different operating conditions, narrow series - Part 1: Dimensions and loads for narrow series

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2020
Aeronavtika - Kroglasti drsni ležaj iz korozijsko odpornega jekla s samomazalno
oblogo, z majhnim začetnim navorom in majhnim tornim količnikom, povišanimi
delovnimi cikli pri nizkih oscilacijah v različnih obratovalnih pogojih, omejena
serija - 1. del: Mere in nosilnosti za ozki tip
Aerospace series - Bearing, spherical plain, in corrosion resisting steel with self-
lubricating liner, low starting torque and low friction coefficient, elevated duty cycles
under low oscillations at different operating conditions, narrow series - Part 1:
Dimensions and loads for narrow series
Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl mit
selbstschmierender Beschichtung, geringem Losbrechmoment und niedrigem
Reibungskoeffizient, hohe Anzahl an gering oszillierenden Belastungszyklen bei
unterschiedlichen Einsatzbedingungen, schmale Reihe - Teil 1: Maße und Belastungen
Série aérospatiale - Rotules lisses en acier résistant à la corrosion à garniture
autolubrifiante, faible couple de démarrage et faible coefficient de frottement, cycles
d'endurance élevés sous faibles oscillations à différentes conditions de fonctionnement,
série étroite - Partie 1 : Dimensions et charges
Ta slovenski standard je istoveten z: EN 4854-1:2019
ICS:
21.100.10 Drsni ležaji Plain bearings
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 4854-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 49.035
English Version
Aerospace series - Bearing, spherical plain, in corrosion
resisting steel with self-lubricating liner, low starting
torque and low friction coefficient, elevated duty cycles
under low oscillations at different operating conditions,
narrow series - Part 1: Dimensions and loads for narrow
series
Série aérospatiale - Rotules lisses en acier résistant à la Luft- und Raumfahrt - Gelenklager aus
corrosion à garniture autolubrifiante, faible couple de korrosionsbeständigem Stahl mit selbstschmierender
démarrage et faible coefficient de frottement, cycles Beschichtung, geringem Losbrechmoment und
d'endurance élevés sous faibles oscillations à niedrigem Reibungskoeffizient, hohe Anzahl an gering
différentes conditions de fonctionnement, série étroite oszillierenden Belastungszyklen bei unterschiedlichen
- Partie 1 : Dimensions et charges Einsatzbedingungen, schmale Reihe - Teil 1: Maße und
Belastungen
This European Standard was approved by CEN on 12 November 2018.

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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4854-1:2019 E
worldwide for CEN national Members.

Contents
Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Symbols and abbreviations . 5
5 Requirements . 6
5.1 Configuration, dimensions, tolerances and mass . 6
5.2 Surface roughness . 6
5.3 Material . 6
5.4 Surface treatment . 6
5.5 Loads and starting torques . 13
6 Designation. 14
7 Marking . 14
8 Technical specification . 14
9 Quality management system . 14
Bibliography . 15

European foreword
This document (EN 4854-1:2019) 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, 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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
1 Scope
This European standard specifies the characteristics of spherical plain bearings in corrosion resisting
steel with self-lubricating liner, low starting torque and low friction coefficient, elevated duty cycles
under low oscillations at different operating conditions, narrow series for aerospace applications.
These self-lubricating spherical plain bearings are intended for use in fixed or moving parts of the
aircraft structure especially for control mechanism and operating systems. The bearings are designed to
be subjected under low dynamic radial loads and slow rotations in the temperature range of
−55°C to 120 °C (−67°F to 248 °F).
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 2030, Aerospace series — Steel X105CrMo17 (1.3544) — Hardened and tempered — Bars —
D ≤ 150 mm
e
EN 2133, Aerospace series — Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa,
copper, copper alloys and nickel alloys
EN 2424, Aerospace series — Marking of aerospace products
EN 3161, Aerospace series — Steel FE-PM3801 (X5CrNiCu17-4) — Air melted, solution treated and
precipitation treated, bar a or D ≤ 200 mm, R ≥ 930 MPa
m
EN 4826, Aerospace series — Zinc-Nickel (12 % to 16 % Ni) plating of steels with specified tensile
strength ≤ 1 450 MPa, copper alloys, nickel alloys and aluminium alloys for parts and fasteners
EN 4854-3, Aerospace series — Bearing, spherical plain, in corrosion resisting steel with self-lubricating
liner, low starting torque and low friction coefficient, elevated duty cycles under low oscillations at
different operating conditions — Part 3: Technical specification
ISO 1132-1:2000, Rolling bearings — Tolerances — Part 1: Terms and definitions
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 6811:1998, Spherical plain bearings — Vocabulary
ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts
ISO 12240-1:1998, Spherical plain bearings — Part 1: Radical spherical plain bearings
TR 4475, Bearings and mechanical transmissions for airframe applications — Vocabulary
AMS 2417, Plating, Zinc-Nickel Alloy

1 Published as ASD-STAN Technical Report at the date of publication of this standard by AeroSpace and Defence
Industries Association of Europe – Standardization (ASD-STAN) (www.asd-stan.org).
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6811:1998 and TR 4475
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
 ISO Online browsing platform: available at http://www.iso.org/obp
 IEC Electropedia: available at http://www.electropedia.org/
4 Symbols and abbreviations
For the purpose of this document following symbols according to ISO 1132-1:2000, ISO 12240-1:1998,
TR 4475 and the following apply:
Δ = deviation of mean bore diameter in a single plane
dmp
Δ = deviation of mean outside diameter in a single plane
Dmp
Δ = deviation of a single bore diameter
ds
Δ = deviation of a single outside diameter
Ds
C = permissible (limit) static axial load
a
C = permissible (limit) static radial load
s
C = permissible (limit) dynamic radial load
dyn
G = Axial internal clearance is the arithmetical mean of the axial distances through which one of
a
the rings may be displaced under the influence of a defined test load relative to the other,
from one eccentric extreme position to the diametrically opposite extreme position.
G = Radial internal clearance is the arithmetical mean of the radial distances through which one
r
of the rings may be displaced under the influence of a defined test load relative to the other,
from one eccentric extreme position to the diametrically opposite extreme position.

2 Published by: Aerospace Industries Association of America, Inc. (AIA), 1250 Eye Street, N.W., Washington, D.C.
20005-3924, USA
5 Requirements
5.1 Configuration, dimensions, tolerances and mass
Dimensions, tolerances and mass according to the related figures and tables. Dimensions and tolerances
are expressed in millimetres (inches) and apply after surface treatment.
 Code S: without swaging groove (Figure 1 and Table 1)
 Code R: with swaging groove (Figure 2 and Table 2)
General tolerances shall be ISO 2768-m in accordance with ISO 2768-1.
5.2 Surface roughness
According to Figure 1 and Figure 2. Dimensions of the surface roughness are expressed in micrometres
(micro inches) and apply before surface treatment.
5.3 Material
Inner ring (ball): Steel per EN 2030, hardness 55 HRC to 62 HRC
Outer ring (race): Steel per EN 3161, hardness 28 HRC to 37 HRC before swaging
Liner: Self-lubricating and wear resistant material with low friction coefficient consistent
with the requirements of EN 4854-3
For alternative materials see TR 4661.
5.4 Surface treatment
Code T:
 inner ring (ball): according to ISO 8075;
 outer ring (race): Zink-Nickel plating per EN 4826 Type 2 (AMS 2417, Type 2 Grade B as
alternative).
Without swaging groove code S: Surface treatment according to ISO 8075 for inner ring before
swaging. Zink-Nickel plating of outer ring: 8 µm to 16 µm (0.000 3 in
to 0.000 6 in) according to EN 4826 Type 2 (AMS 2417, Type 2
Grade B as alternative).
Required area, see Figure 1 (both end surfaces up to the chamfer at
manufacturer’s option).
With swaging groove code R: Surface treatment according to ISO 8075 for inner ring before
swaging. Zink-Nickel plating of outer ring: 8 µm to 16 µm (0.000 3 in
to 0.000 6 in) according to EN 4826 Type 2 (AMS 2417, Type 2
Grade B as alternative).
Required
...