oSIST prEN 12080:2024

SLOVENSKI STANDARD
01-oktober-2024
Nadomešča:
SIST EN 12080:2017+A1:2022
Železniške naprave - Ohišja ležajev kolesnih dvojic - Kotalni ležaji
Railway applications - Axleboxes - Rolling bearings
Bahnanwendungen - Radsatzlager - Wälzlager
Applications ferroviaires - Boîtes d'essieux - Roulements
Ta slovenski standard je istoveten z: prEN 12080
ICS:
21.100.20 Kotalni ležaji Rolling bearings
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TC 256
Date: 2024-05
Secretariat: DIN
Railway applications — Axleboxes — Rolling bearings
Bahnanwendungen — Radsatzlager — Wälzlager
Applications ferroviaires — Boîtes d'essieux — Roulements
ICS:
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Technical specification . 9
4.1 General requirements . 9
4.2 Technical specification content . 9
4.2.1 New bearing development . 9
4.2.2 Information from bearing supplier . 10
4.2.3 Bearing supplier quality management system . 10
5 Quality systems . 11
6 Manufacture . 11
6.1 Steel manufacturing . 11
6.2 Heat treatment . 11
6.3 Traceability . 11
6.4 Coatings . 13
6.4.1 General. 13
6.4.2 Permanent coating . 13
6.4.3 Non-permanent coating . 13
7 Material properties . 13
7.1 General. 13
7.2 Steel for rings and rolling elements . 13
7.2.1 Grades . 13
7.2.2 Inclusion content . 14
7.3 Materials of other components (cages, spacers, seals etc.) . 14
8 Geometry and dimensions . 14
8.1 Dimensions and tolerances . 14
8.2 Rolling bearing internal clearance . 14
8.2.1 Rolling bearing clearance before mounting . 14
8.2.2 Rolling bearing clearance after mounting . 14
9 Mechanical properties — inner ring expanding ability . 14
10 Physical properties . 15
10.1 Visual aspect . 15
10.1.1 Rings and rolling elements . 15
10.1.2 Cages . 15
10.2 Soundness of rings and rolling elements . 15
10.2.1 General rules . 15
10.2.2 Internal soundness of rings . 16
10.2.3 Soundness of ring surfaces . 16
10.2.4 Soundness of roller raceway surfaces . 16
10.2.5 Grinding burns . 16
10.3 Case depth . 16
10.4 Surface hardness . 16
11 Marking . 17
11.1 General . 17
11.2 Marking of rings for cylindrical roller bearings (CRB) . 17
11.3 Marking of cartridge bearings for axleboxes . 19
11.4 Marking of spherical roller bearings (SRB) . 20
11.5 Prefix and postfix . 21
12 Inspection . 21
12.1 Inspection plan . 21
12.2 Sampling . 23
13 Quality records . 23
14 Deployment. 23
15 Delivery and packing . 23
15.1 Greasing of rolling bearings. 23
15.2 Corrosion protection . 23
15.3 Packaging . 23
Annex A (normative) Ultrasonic inspection of rolling bearing rings . 25
Annex B (normative) Magnetic particle inspection of ring surfaces . 30
Annex C (normative) Eddy current inspection of the raceways of the rollers. 32
Annex D (normative) Cages of polymeric material . 35
Annex E (informative)  Eddy current testing of ring surfaces . 47
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of Directive (EU) 2016/797 aimed to be covered . 51
Bibliography . 53

European foreword
This document (prEN 12080:2024) has been prepared by Technical Committee CEN/TC 256 “Railway
Applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12080:2017.
EN 12080 includes the following significant technical changes with respect to EN 12080:2017:
— Focus is only on rolling bearing related product requirements. As a consequence, product
requirements not related to the rolling bearing or requirements connected with conformity
assessment of the rolling bearing have been deleted or transferred to EN 12082-2
— Clause 4 on Technical Specification is revised
— Annex E Approval Procedures and Annex F Criteria to determine the extent of approval procedures
are deleted and respective content transferred to EN 12082-2
— Annex G is transferred to EN 12082-2
— With respect to Clause 10.2.3 Soundness of ring surfaces, eddy current testing is more emphasized
as an alternative to Magnetic Particle Inspection. A new Annex E is introduced with requirements
on how eddy current testing of ring surfaces should be processed
— Concerning Clause 11 Marking, changes are made to harmonize requirements for different rolling
bearing types and to address modern practices such as Data Matrix Coding
— Annex D Cages of polymeric material is reviewed with changes across the annex.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex Z, which is an integral part of this
document
Introduction
This standard is part of a set of standards: EN 12080, EN 12081, EN 12082-1 and EN 12082-2.
This documenthas 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.
1 Scope
This document 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 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 refere
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