SIST EN 6046:2020

Aerospace series - Bearing, spherical, plain, in corrosion resisting steel - Narrow series - Dimensions and loads - Inch series

This European standard specifies the characteristics of inch based spherical plain bearing, metal to metal, in corrosion resisting steel, narrow series.
They are intended for use in fixed or moving parts of the aircraft structure and their control mechanisms.
They shall be used in the temperature range as determined by the grease capability as below:
- code A: grease as per MIL PRF 23827 Type I, operating temperature range −73 °C to 121 °C;
- code B: grease as per MIL PRF 81322, operating temperature range −54 °C to 177 °C.
The range of application for bearings lubricated with grease per code A is limited to 121 °C.
In both cases the spherical surface of the outer or inner ring have to be provided with a dry film lubricant as per MIL PRF 46010 or equivalent (anti seizing protection).

Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl - Schmale Reihe - Maße und Belastungen - Inch-Reihe

Diese Europäische Norm legt die Eigenschaften von Gelenklagern, Metall auf Metall, schmale Reihe, Inch Reihe, fest.
Sie sind für die Verwendung in starren oder beweglichen Flugwerkteilen und deren Betätigungs-mechanismen bestimmt.
Sie müssen im von der Schmierfähigkeit bestimmten Temperaturbereich wie nachfolgend beschrieben verwendet werden:
   Kennbuchstabe A: Schmierstoff nach MIL PRF 23827 Typ I, Betriebstemperaturbereich −73 °C bis 121 °C;
   Kennbuchstabe B: Schmierstoff nach MIL PRF 81322, Betriebstemperaturbereich −54 °C bis 177 °C.
Der Anwendungsbereich für Lager, die mit Schmierstoffen nach Kennbuchstabe A geschmiert sind, ist auf 121 °C begrenzt.
In beiden Fällen muss auf die Kugelfläche des Außenrings oder Innenrings ein Trockenschmierstoff nach MIL PRF 46010 oder Ähnliches aufgebracht werden (Schutz gegen Festfressen).

Série aérospatiale - Rotule lisse en acier résistant à la corrosion - Série étroite - Dimensions et charges - Série en inches

La présente norme européenne spécifie les caractéristiques des rotules lisses en inches, métal sur métal, en acier résistant à la corrosion, série étroite.
Elles sont destinées à être utilisées pour les parties fixes ou mobiles de la structure des aéronefs et leurs mécanismes de contrôle.
Elles doivent être utilisées dans la plage de températures déterminée en fonction des capacités de la graisse suivantes :
- code A : graisse conforme au Type I de la MIL-PRF-23827, plage de températures de fonctionnement de −73 °C à 121 °C ;
- code B : graisse conforme à la MIL-PRF-81322, plage de températures de fonctionnement de −54 °C à 177 °C.
La plage d’application des rotules lubrifiées à l’aide de graisse suivant le code A est limitée à 121 °C.
Dans les deux cas, la surface sphérique de la bague extérieure ou intérieure doit être pourvue d’un lubrifiant à film sec selon la MIL-PRF-46010 ou équivalente (protection anti-grippage).

Aeronavtika - Kroglasti drsni ležaji iz korozijsko odpornega jekla - Ozki tip - Mere in obremenitve - Palčne mere

General Information

• Status: Published
• Publication Date: 07-Apr-2020
• ICS: 21.100.01 - Bearings in general
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Apr-2020
• Due Date: 11-Jun-2020
• Completion Date: 08-Apr-2020
• Ref Project: EN 6046:2020 - Aerospace series - Bearing, spherical, plain, in corrosion resisting steel - Narrow series - Dimensions and loads - Inch series

Relations

• Revised: kSIST FprEN 6046:2025 - Aerospace series - Bearing, spherical, plain, in corrosion resisting steel - Narrow series - Dimensions and loads - Inch series
• Effective Date: 30-Aug-2023

Overview

EN 6046:2020 - Aerospace series: Bearing, spherical, plain, in corrosion resisting steel - Narrow series - Dimensions and loads - Inch series. This European standard specifies inch‑based metal‑to‑metal spherical plain bearings in corrosion‑resisting steel (narrow series) for fixed or moving parts of aircraft structures and control mechanisms. It defines materials, dimensions, tolerances, surface treatments, loads, clearances, designation and marking requirements for aerospace use.

Key topics and technical requirements

• Bearing type: Spherical plain bearing, metal-to-metal, narrow series, inch (1/16 in bore code) sizing.
• Materials & hardness:
  • Inner ring: steel per EN 2030; hardness 55–62 HRC.
  • Outer ring: steel per EN 3161; hardness 28–38 HRC (before swaging).
• Lubrication & temperature codes:
  • Code A: grease per MIL‑PRF‑23827 Type I, operating range −73 °C to 121 °C (application limited to 121 °C).
  • Code B: grease per MIL‑PRF‑81322, operating range −54 °C to 177 °C.
  • Spherical surface of outer or inner ring must have a dry‑film lubricant per MIL‑PRF‑46010 (anti‑seize protection).
• Surface treatment options:
  • ISO 8075 guidance for stainless steel surface treatment.
  • Code Z: cadmium plating of outer ring (5 µm to 8 µm) per EN 2133, followed by chromating.
• Dimensions & tolerances: Values given in millimetres with inch equivalents; apply after surface treatment. Detailed tables cover bore sizes, masses, angles, and geometric limits.
• Loads & clearances:
  • Permissible and ultimate static radial/axial loads provided (see Tables 2 & 3).
  • Permissible surface pressures defined (e.g., 530 MPa / 460 MPa depending on application).
  • Clearance options: normal (Code N) and reduced (Code P).
• Marking & designation: Marking per EN 2424 (style A); designation format and optional identity codes detailed.
• Quality & specifications: Technical specification referenced to EN 2337 and TR 4475; manufacturer quality management required.

Applications

• Aircraft structural joints and moving control linkages where corrosion resistance, predictable loads and tight dimensional control are required.
• Replacement, procurement and design of aerospace bearings for primary and secondary structures, actuators and mechanism pivots.

Who should use EN 6046:2020

• Aerospace designers and structural engineers
• Bearing manufacturers and suppliers
• Procurement specialists and maintenance engineers
• Quality managers and regulatory compliance teams

Related standards

• EN 2337 (spherical plain bearings technical specification), EN 2030, EN 3161, EN 2133, EN 2424, ISO 8075, MIL‑PRF‑23827, MIL‑PRF‑81322, MIL‑PRF‑46010, TR 4475.

Keywords: EN 6046:2020, spherical plain bearing, aerospace bearing, inch series, corrosion resisting steel, MIL‑PRF, cadmium plating, dimensions and loads.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2020
Aeronavtika - Kroglasti drsni ležaji iz korozijsko odpornega jekla - Ozki tip - Mere
in obremenitve - Palčne mere
Aerospace series - Bearing, spherical, plain, in corrosion resisting steel - Narrow series -
Dimensions and loads - Inch series
Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl - Schmale Reihe -
Maße und Belastungen - Inch-Reihe
Série aérospatiale - Rotule lisse en acier résistant à la corrosion - Série étroite -
Dimensions et charges - Série en inches
Ta slovenski standard je istoveten z: EN 6046:2020
ICS:
21.100.01 Ležaji na splošno Bearings in general
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 6046
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 49.035
English Version
Aerospace series - Bearing, spherical, plain, in corrosion
resisting steel - Narrow series - Dimensions and loads -
Inch series
Série aérospatiale - Rotule lisse en acier résistant à la Luft- und Raumfahrt - Gelenklager aus
corrosion - Série étroite - Dimensions et charges - Série korrosionsbeständigem Stahl - Schmale Reihe - Maße
en inches und Belastungen - Inch-Reihe
This European Standard was approved by CEN on 19 August 2019.

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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6046:2020 E
worldwide for CEN national Members.

Contents
Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 6
4.1 Configuration, dimensions, tolerances and mass . 6
4.2 Surface roughness . 6
4.3 Material . 7
4.4 Surface treatment . 7
4.5 Loads and clearances . 8
5 Designation. 15
6 Marking . 15
7 Technical specification . 15
8 Quality management system . 15
Annex A (informative) Standard evolution form . 16
Bibliography . 17

European foreword
This document (EN 6046:2020) 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 September 2020, and conflicting national standards
shall be withdrawn at the latest by September 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.
Introduction
This document is published at edition P7. Former editions P1 to P6 and drafts may exist for Airbus
development only but without any ASD-STAN official publication. In consequence configuration
management discrepancies with these unofficial documents are under Airbus responsibility.
1 Scope
This European standard specifies the characteristics of inch based spherical plain bearing, metal to
metal, in corrosion resisting steel, narrow series.
They are intended for use in fixed or moving parts of the aircraft structure and their control
mechanisms.
They shall be used in the temperature range as determined by the grease capability as below:
— code A: grease as per MIL-PRF-23827 Type I, operating temperature range −73 °C to 121 °C;
— code B: grease as per MIL-PRF-81322, operating temperature range −54 °C to 177 °C.
The range of application for bearings lubricated with grease per code A is limited to 121 °C.
In both cases the spherical surface of the outer or inner ring have to be provided with a dry-film
lubricant as per MIL-PRF-46010 or equivalent (anti-seizing protection).
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 2337, Aerospace series — Spherical plain bearings — Technical specification
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
MIL-PRF-23827, Grease, Aircraft and Instrument, Gear and Actuator Screw
MIL-PRF-81322, Grease, aircraft, general purpose, wide temperature range
MIL-PRF-46010, Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting NATO Code — S-1738
ISO 1132-1, Rolling bearings — Tolerances — Part 1: Terms and definitions
ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts
TR 4475, Aerospace series — Bearings and mechanical transmissions for airframe applications —
Vocabulary
1 Published by: Department of Defense (DoD), the Pentagon, Washington, D.C., 20307, USA.
2 Published as ASD-STAN Technical Report (TR) at the date of publication of this European standard by
AeroSpace and Defence Industries Association of Europe – Standardization (ASD-STAN), see
www.asd-stan.org).
3 Terms and definitions
For the purposes of this document, the terms and definitions given in TR 4475 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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