EN 4854-1:2019

• Abstract:

  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).

• Status: Published
• Publication Date: 22-Oct-2019
• Withdrawal Date: 29-Apr-2020
• 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: 21-Jan-2025
• Completion Date: 17-Sep-2026
• Ref Project: 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

• Refers: ISO 6811:1998 - Spherical plain bearings — Vocabulary
• Effective Date: 25-Aug-2026
• Refers: ISO 2768-1:1989 - General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
• Effective Date: 25-Aug-2026
• Refers: ISO 1132-1:2000 - Rolling bearings — Tolerances — Part 1: Terms and definitions
• Effective Date: 25-Aug-2026
• Refers: ISO 8075:1985 - Aerospace — Surface treatment of hardenable stainless steel parts
• Effective Date: 25-Aug-2026
• Refers: ISO 12240-1:1998 - Spherical plain bearings — Part 1: Radial spherical plain bearings
• Effective Date: 25-Aug-2026
• Refers: EN 3161:2026 - Aerospace series - Steel X5CrNiCu17-4 (1.4542) - Air melted - Solution treated and precipitation treated - Bars - a or D ≤ 200 mm - Rm ≥ 930 MPa
• Effective Date: 27-May-2026
• Refers: EN 2133:2020 - Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa, copper, copper alloys and nickel alloys
• Effective Date: 28-Jan-2026
• Refers: EN 4826:2014 - Aerospace series - Zinc-Nickel (12 %-16 % Ni) plating of steels with specified tensile strength ≤ 1 450 MPa, copper alloys, nickel alloys and aluminium alloys for parts and fasteners
• Effective Date: 28-Jan-2026
• Refers: EN 1426:2007 - Bitumen and bituminous binders - Determination of needle penetration
• Effective Date: 28-Jan-2026
• Refers: EN 2030:2013 - Aerospace series - Steel X105CrMo17 (1.3544) - Hardened and tempered - Bars - De ≤ 150 mm
• Effective Date: 28-Jan-2026
• Refers: EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: EN 12631:1999 - Fruit and vegetable juices - Enzymatic determination of D- and L-lactic acid (lactate) content - NAD spectrometric method
• Effective Date: 28-Jan-2026
• Refers: EN 13522:2001 - Footwear - Test methods for uppers - Tensile strength and elongation
• Effective Date: 28-Jan-2026
• Refers: EN 3161:2007 - Aerospace series - Steel FE-PM3801 (X5CrNiCu17-4) - Air melted, solution treated and precipitation treated, bar a or D ≤ 200 mm, Rm ≥ 930 MPa
• Effective Date: 28-Jan-2026
• Refers: 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

Overview

EN 4854-1:2019 (CEN) defines dimensions and load characteristics for a narrow series of spherical plain bearings used in aerospace applications. The standard covers bearings made of corrosion resisting steel with a self-lubricating liner designed for low starting torque, low friction coefficient, and elevated duty cycles under low oscillations. These bearings are intended for fixed or moving aircraft structure parts - especially control mechanisms and operating systems - and are rated for slow rotations and low dynamic radial loads in the temperature range −55 °C to 120 °C (−67 °F to 248 °F).

Key topics and technical requirements

• Scope & use: Narrow-series spherical plain bearings for aerospace control and operating systems.
• Dimensions & configuration: Detailed figures and tables for two codes - Code S (without swaging groove) and Code R (with swaging groove). Main dimensions, tolerances and mass given in mm (and inches) and apply after surface treatment.
• Materials & hardness:
  • Inner ring (ball): steel per EN 2030, hardness 55–62 HRC.
  • Outer ring (race): steel per EN 3161, hardness 28–37 HRC before swaging.
  • Liner: self-lubricating, wear-resistant material per EN 4854-3 requirements.
• Surface treatments:
  • Code T: inner ring per ISO 8075; outer ring Zinc‑Nickel plating (EN 4826 Type 2), thickness 8–16 µm (AMS 2417 Type 2 Grade B alternative).
  • Code P: inner ring per ISO 8075; outer ring Cadmium plating (EN 2133), thickness 5–8 µm, followed by chromating.
• Tolerances & roughness: General tolerances per ISO 2768‑m; surface roughness specified in figures (values apply before surface treatment).
• Loads & torques: Permissible static/dynamic radial and axial loads, and starting torque limits are specified.
• Designation, marking & quality: Rules for designation, marking requirements, technical specification references and quality management system expectations.

Applications

• Aircraft control linkages, actuators, and operating systems where slow oscillation motion and reliable low-friction performance are critical.
• Replacement, procurement and specification of bearings for new airframe designs and maintenance programs.
• Use cases requiring corrosion-resistant bearings with self-lubricating liners and narrow dimensional envelopes.

Who should use this standard

• Aerospace design and mechanical engineers
• Bearing manufacturers and suppliers
• Procurement and quality assurance teams in aviation OEMs and MROs
• Certification and compliance specialists specifying component standards

Related standards

• EN 4854-3 (Technical specification for the same bearing family)
• EN 2030, EN 3161 (material standards)
• EN 4826, EN 2133 (surface plating standards)
• ISO 6811, ISO 12240-1, ISO 8075, ISO 2768

Keywords: EN 4854-1, spherical plain bearing, aerospace bearings, self-lubricating liner, corrosion resisting steel, low starting torque, dimensions and loads.

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 s
...