Railway applications - Axleboxes - Rolling bearings

This European Standard specifies the quality parameters of axlebox rolling bearings supporting the load of the vehicle, required for reliable operation of trains on European networks. It covers metallurgical and material properties as well as geometric and dimensional characteristics. It also defines methods for quality assurance and conditions for approval of the products.

Bahnanwendungen - Radsatzlager - Wälzlager

Diese Europäische Norm legt die Qualitätsanforderungen für Wälzlager von Radsatzlagern fest, die die Primärlast des Fahrzeugs tragen und für einen zuverlässigen Zugbetrieb auf den europäischen Schienennetzen erforderlich sind. Sie beschreibt metallurgische Eigenschaften und Werkstoffeigenschaften und legt die Maß- und Formgenauigkeit fest. Darüber hinaus legt sie Verfahren für Qualitätssicherung und Freigabebedingungen fest.

Applications ferroviaires - Boîtes d'essieux - Roulements

Železniške naprave - Ohišja ležajev kolesnih dvojic - Kotalni ležaji (vključno z dopolnilom A1)

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Sep-2022
Completion Date
07-Sep-2022

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SLOVENSKI STANDARD
SIST EN 12080:2017+A1:2022
01-november-2022
Železniške naprave - Ohišja ležajev kolesnih dvojic - Kotalni ležaji (vključno z
dopolnilom A1)
Railway applications - Axleboxes - Rolling bearings
Bahnanwendungen - Radsatzlager - Wälzlager
Applications ferroviaires - Boîtes d'essieux - Roulements
Ta slovenski standard je istoveten z: EN 12080:2017+A1:2022
ICS:
21.100.20 Kotalni ležaji Rolling bearings
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
SIST EN 12080:2017+A1:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12080:2017+A1:2022
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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 21.100.20; 45.040 Supersedes EN 12080:2017
English Version
Railway applications - Axleboxes - Rolling bearings

Applications ferroviaires - Boîtes d'essieux - Bahnanwendungen - Radsatzlager - Wälzlager

Roulements

This European Standard was approved by CEN on 19 June 2017 and includes Amendment 1 approved by CEN on 6 June 2022.

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, Türkiye 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

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12080:2017+A1:2022 E

worldwide for CEN national Members.
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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 7

1 Scope .................................................................................................................................................................... 8

2 Normative references .................................................................................................................................... 8

3 Terms and definitions ................................................................................................................................... 9

4 Technical specification ............................................................................................................................... 11

4.1 General requirements ................................................................................................................................ 11

4.2 Technical specification content .............................................................................................................. 11

5 Quality systems ............................................................................................................................................. 12

6 Manufacture ................................................................................................................................................... 12

6.1 Steel manufacturing .................................................................................................................................... 12

6.2 Heat treatment .............................................................................................................................................. 12

6.3 Traceability .................................................................................................................................................... 13

6.4 Coatings ........................................................................................................................................................... 14

6.4.1 General ............................................................................................................................................................. 14

6.4.2 Permanent coating....................................................................................................................................... 14

6.4.3 Non-permanent coating ............................................................................................................................. 14

7 Material properties ..................................................................................................................................... 14

7.1 General ............................................................................................................................................................. 14

7.2 Steel for rings and rolling elements ...................................................................................................... 14

7.2.1 Grades............................................................................................................................................................... 14

7.2.2 Inclusion content .......................................................................................................................................... 15

7.3 Materials of other components (cages, spacers, seals etc.) .......................................................... 15

8 Geometry and dimensions ........................................................................................................................ 15

8.1 Dimensions and tolerances ...................................................................................................................... 15

8.2 Rolling bearing internal clearance ........................................................................................................ 15

8.2.1 Rolling bearing clearance before mounting ....................................................................................... 15

8.2.2 Rolling bearing clearance after mounting .......................................................................................... 16

9 Mechanical properties — inner ring expanding ability ................................................................. 16

10 Physical properties ...................................................................................................................................... 16

10.1 Visual aspect .................................................................................................................................................. 16

10.1.1 Rings and rolling elements ....................................................................................................................... 16

10.1.2 Cages ................................................................................................................................................................. 16

10.2 Soundness of rings and rolling elements ............................................................................................. 16

10.2.1 General rules .................................................................................................................................................. 16

10.2.2 Internal soundness of rings ...................................................................................................................... 17

10.2.3 Soundness of ring surfaces ....................................................................................................................... 17

10.2.4 Soundness of roller raceway surfaces .................................................................................................. 17

10.2.5 Grinding burns .............................................................................................................................................. 17

10.3 Case depth ....................................................................................................................................................... 17

10.4 Surface hardness .......................................................................................................................................... 18

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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)

11 Marking ............................................................................................................................................................ 18

11.1 General ............................................................................................................................................................. 18

11.2 Marking of rings for cylindrical roller bearings (CRB) ................................................................... 19

11.3 Marking of cartridge bearings for axleboxes...................................................................................... 19

11.4 Marking of spherical roller bearings (SRB) ........................................................................................ 20

11.5 Prefix and postfix .......................................................................................................................................... 20

12 Inspection ........................................................................................................................................................ 20

12.1 Inspection plan .............................................................................................................................................. 20

12.2 Sampling .......................................................................................................................................................... 21

13 Quality records .............................................................................................................................................. 22

14 Approval ........................................................................................................................................................... 22

15 Delivery and packing ................................................................................................................................... 22

15.1 Greasing of rolling bearings ...................................................................................................................... 22

15.2 Corrosion protection ................................................................................................................................... 22

15.3 Packaging ......................................................................................................................................................... 22

Annex A (normative) Ultrasonic inspection of rolling bearing rings ...................................................... 24

A.1 Purpose ............................................................................................................................................................ 24

A.2 Principle ........................................................................................................................................................... 24

A.3 Equipment ....................................................................................................................................................... 24

A.4 Operating procedure ................................................................................................................................... 24

A.4.1 General rules .................................................................................................................................................. 24

A.4.2 Preparation of rings ..................................................................................................................................... 24

A.4.3 Examination .................................................................................................................................................... 25

A.4.4 Calibration ....................................................................................................................................................... 25

Annex B (normative) Magnetic particle inspection of ring surfaces ....................................................... 29

B.1 Purpose ............................................................................................................................................................ 29

B.2 Principle ........................................................................................................................................................... 29

B.3 Equipment ....................................................................................................................................................... 29

B.4 Operation procedure ................................................................................................................................... 30

B.4.1 Preparation of rings ..................................................................................................................................... 30

B.4.2 Examination .................................................................................................................................................... 30

B.4.3 Demagnetisation ........................................................................................................................................... 30

Annex C (normative) Eddy current inspection of the raceways of the rollers ..................................... 31

C.1 Purpose ............................................................................................................................................................ 31

C.2 Principle ........................................................................................................................................................... 31

C.3 Equipment ....................................................................................................................................................... 31

C.4 Operating procedure ................................................................................................................................... 31

C.4.1 Preparation of rollers ................................................................................................................................. 31

C.4.2 Examination .................................................................................................................................................... 31

C.4.3 Calibration ....................................................................................................................................................... 32

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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)

Annex D (normative) Cages of polymeric material ....................................................................................... 34

D.1 Purpose ............................................................................................................................................................ 34

D.2 Material ............................................................................................................................................................ 34

D.2.1 General ............................................................................................................................................................. 34

D.2.2 Base material ................................................................................................................................................. 34

D.2.3 Additives .......................................................................................................................................................... 34

D.2.4 Conditioning ................................................................................................................................................... 34

D.3 Cage requirements ....................................................................................................................................... 34

D.3.1 Inspection plan.............................................................................................................................................. 34

D.3.2 Moisture content .......................................................................................................................................... 36

D.3.3 Fibre glass diameter and length measurement procedure .......................................................... 36

D.3.4 Surface quality............................................................................................................................................... 37

D.3.5 Sub-surface quality ...................................................................................................................................... 37

D.4 Mechanical tests ........................................................................................................................................... 39

D.4.1 Test conditions .............................................................................................................................................. 39

D.4.2 Bending test procedures ........................................................................................................................... 40

D.4.3 Tension test procedures ............................................................................................................................ 41

D.5 Thermal ageing in grease or oil bath .................................................................................................... 43

Annex E (normative) Approval procedures ..................................................................................................... 44

E.1 General ............................................................................................................................................................. 44

E.2 Complete procedure, type C ..................................................................................................................... 44

E.2.1 General ............................................................................................................................................................. 44

E.2.2 Stage 1 .............................................................................................................................................................. 44

E.2.3 Stage 2 .............................................................................................................................................................. 44

E.2.4 Stage 3 .............................................................................................................................................................. 44

E.2.5 Stage 4 .............................................................................................................................................................. 45

E.2.6 Decision ........................................................................................................................................................... 45

E.3 Reduced procedure, type R ....................................................................................................................... 45

Annex F (normative) Criteria to determine the extent of approval procedures ................................ 46

Annex G (informative) Examples of axlebox assemblies ............................................................................ 48

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of Directive (EU) 2016/797 aimed to be covered ............................................... 50

Bibliography ................................................................................................................................................................. 52

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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)
European foreword

This document (EN 12080:2017+A1:2022) has been prepared by Technical Committee CEN/TC 256

“Railway Applications”, the secretariat of which is held by DIN.

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 March 2023, and conflicting national standards shall

be withdrawn at the latest by March 2023.

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 includes Amendment 1 approved by CEN on 6 June 2022.
This document supersedes !EN 12080:2017".

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

The main changes with respect to the previous edition are listed below:

— !The use of conditioning for polymer cages is no longer mandatory and is specified in 4.2

— A clarification of deviations in marking of cylindrical roller bearings is new in 11.2 and 11.3

— The inspection plan for inclusion content in 12.1 (footnote h in Table 3) has been made clearer and

now also includes specifications for sample preparations
— The sensor definition in C.3 is now more relevant
— Conditioning can now be performed also at the bearing manufacturer (see D.2.4)

— The sample frequency for polymeric cages in D.3.1.1 is now more relevant and the terms

“Approval” and “Series” are better defined

— Table D.1 has been renamed for clarity and the requirements for “Viscosity index” and “Length of

glass fibres” have been relaxed to be more relevant

— The requirement for “Mechanical test for material approval” in Table D.1 have been changed so that

it is clear that the Charpy impact test is on “un-notched” samples and made according to the

relevant norm, the requirement for the “Bending strength on the test specimen” is changed and a

clarification on how “Thermal ageing in grease or oil bath” is performed has been added

— Footnote d in Table D.1 now allows for use of inspection certificate 3.1 and a new footnote “h” is

added to specify sampling frequency

— ISO 15512 can be used for moisture content determination in D.3.2 and a clarification on the use of

desiccator is added

— In D.3.4.3 some additions are made on how to address burrs on the edge and outside of functional

areas
— D.3.5 is rewritten to address “void clusters” and Figure D.1 is replaced
— The Annex ZA has been revised to take into account EU Directive (EU) 2016/797"
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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral

part of this document.

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.

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, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)
Introduction
This standard is part of a set of standards: EN 12080, EN 12081 and EN 12082.

This European Standard has been drawn up with the purpose of aiming at optimum performance in rail

transportation. Performance implies a certain quality level of the vehicle running gear, which every

railway undertaking may require, notably by imposing procedures in approval and requesting the

existence of a quality assurance system for the supply of rolling bearings intended for rolling stock

operating on its network or other networks in Europe.
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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)
1 Scope

This European Standard specifies the quality parameters of axlebox rolling bearings supporting the load

of the vehicle, required for reliable operation of trains on European networks. It covers metallurgical

and material properties as well as geometric and dimensional characteristics. It also defines methods

for quality assurance and conditions for approval of the products.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 10204:2004, Metallic products - Types of inspection documents
EN 12081:2017, Railway applications - Axleboxes - Lubricating greases
EN 12082:2017, Railway applications - Axleboxes - Performance testing
EN 13018:2016, Non-destructive testing - Visual testing - General principles
EN 15663:2017, Railway applications - Definition of vehicle reference masses
EN ISO 178:2010, Plastics - Determination of flexural properties (ISO 178:2010)

EN ISO 179-1:2010, Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented

impact test (ISO 179-1:2010)

EN ISO 307:2007, Plastics - Polyamides - Determination of viscosity number (ISO 307:2007)

EN ISO 683-17:2014, Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller

bearing steels (ISO 683-17:2014)

EN ISO 1172:2003, Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates -

Determination of the textile-glass and mineral-filler content - Calcination methods (ISO 1172:1996)

EN ISO 1183-1:2012, Plastics - Methods for determining the density of non-cellular plastics - Part 1:

Immersion method, liquid pyknometer method and titration method (ISO 1183-1:2012)

EN ISO 1183-2:2004, Plastics - Methods for determining the density of non-cellular plastics - Part 2:

Density gradient column method (ISO 1183-2:2004)

EN ISO 2639:2002, Steels - Determination and verification of the depth of carburized and hardened cases

(ISO 2639:2002)

EN ISO 3059:2012, Non-destructive testing - Penetrant testing and magnetic particle testing - Viewing

conditions (ISO 3059:2012)

EN ISO 3451-1:2008, Plastics - Determination of ash - Part 1: General methods (ISO 3451-1:2008)

EN ISO 6507-1:2005, Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2005)

EN ISO 6508-1:2016, Metallic materials - Rockwell hardness test - Part 1: Test method (ISO 6508-1:2016)

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SIST EN 12080:2017+A1:2022
EN 12080:2017+A1:2022 (E)

EN ISO 6508-2:2015, Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of

testing machines and indenters (ISO 6508-2:2015)

EN ISO 6508-3:2015, Metallic materials - Rockwell hardness test - Part 3: Calibration of reference blocks

(ISO 6508-3:2015)

EN ISO 9934-1:2016, Non-destructive testing - Magnetic particle testing - Part 1: General principles

(ISO 9934-1:2016)

EN ISO 9934-2:2015, Non-destructive testing - Magnetic particle testing - Part 2: Detection media

(ISO 9934-2:2015)

EN ISO 9934-3:2014, Non-destructive testing - Magnetic particle testing - Part 3: Equipment

(ISO 9934-3:2015)

EN ISO 11357-3:2013, Plastics - Differential scanning calorimetry (DSC) - Part 3: Determination of

temperature and enthalpy of melting and crystallization (ISO 11357-3:2011)
ISO 281:2007, Rolling bearings — Dynamic load ratings and rating life

ISO 492:2014, Rolling bearings — Radial bearings — Geometrical product specifications (GPS) and

tolerance values

ISO 4967:2013, Steel - Determination of content of non-metallic inclusions - Micrographic method using

standard diagrams
!ISO 15512:2016, Plastics — Determination of water content"
ASTM E45:2014, Standard Test Methods for Dete
...

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