EN 12082-2:2025

SLOVENSKI STANDARD
01-februar-2026
Nadomešča:
SIST EN 12082:2017+A1:2021
Železniške naprave - Ohišja ležajev kolesnih dvojic - 2. del: Postopek nameščanja
Railway applications - Axleboxes - Part 2: Deployment Procedure
Bahnanwendungen - Radsatzlager - Teil 2: Inverkehrbringungsprozess
Applications ferroviaires - Boîtes d'essieux - Partie 2: Procédure de déploiement
Ta slovenski standard je istoveten z: EN 12082-2:2025
ICS:
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.

EN 12082-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 45.040 Supersedes EN 12082:2017+A1:2021
English Version
Railway applications - Axleboxes - Part 2: Deployment
Procedure
Applications ferroviaires - Boîtes d'essieux - Partie 2: Bahnanwendungen - Radsatzlager - Teil 2:
Procédure de déploiement Inverkehrbringungsprozess
This European Standard was approved by CEN on 17 November 2025.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12082-2:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Deployment Procedure . 6
4.1 General requirements . 6
4.2 Complete procedure, type C . 7
4.2.1 General. 7
4.2.2 Stage 1 . 8
4.2.3 Stage 2 . 8
4.2.4 Stage 3 . 8
4.2.5 Decision . 8
4.2.6 Axlebox in-service surveillance . 9
4.3 Reduced procedure, type R . 9
4.4 Axlebox bearings for prototype or test vehicles . 9
5 Criteria to determine the extent of deployment procedures . 9
Annex A (normative) Similarity assessment for box housing . 13
A.1 Axlebox housings with similar designs . 13
A.2 Axlebox housing design categories . 14
Annex B (informative) Examples of axleboxes . 16
Bibliography . 18

European foreword
This document (EN 12082-2:2025) 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 June 2026, and conflicting national standards shall be
withdrawn at the latest by May 2026.
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 supersedes EN 12082:2017+A1:2021.
EN 12082:2017+A1:2021:
— Document split into EN 12082-1 about Test procedures and EN 12082-2 about Deployment
procedure.
— Focus of EN 12082-2 is on process and requirements for the deployment of the axlebox system. This
eliminates usage of the ambiguous term approval and clarifies that it is the axlebox that is in scope
of the deployment.
— Criteria which define objectives and extent of the deployment procedure are redefined, further
clarified and respective clauses moved from EN 12080 to EN 12082-2.
— Compatibility assessment of grease with polymers and thermoplastic material moved from
EN 12081 to EN 12082-2.
— Annex including Examples of axleboxes moved from EN 12080 to EN 12082-2.
— Saddle adapter added as a possible housing design to the overview of common axlebox designs.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
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, 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 the United
Kingdom.
1 Scope
This document is a part of a package of standards: EN 12080, EN 12081, EN 12082-1 and EN 12082-2.
This document specifies the principles and methods for deployment of the system of axlebox rolling
bearing(s), housing, seal(s) and grease, required for reliable operation of trains on European networks.
It covers the conformity assessment with respect to design requirements on the rolling bearing(s)
according EN 12080 and grease according EN 12081 as well as the performance of (rig) tests according
to EN 12082-1. This document is historically developed for outboard applications with rotating inner
rings, but can be used for vehicles with inboard bearing arrangements with rotating inner rings.
The present document describes the complete deployment procedure for new axleboxes and it specifies
the necessary type and extent of testing. For certain cases and based on a documented risk assessment, a
reduced deployment procedure is described.
This document only applies to axleboxes equipped with rolling bearings and greases according to
EN 12080 and EN 12081.
It is not within the scope of EN 12082-2 to specify the technical details of the testing procedures, these
are covered by EN 12082-1.
It is not within the scope of EN 12082-2 to define the validation procedure of box housings, sleeves or
covers from a structural point of view. The relevance of these parts in the scope of this document is
limited to the interaction with the axle box rolling bearing with respect to the required service.
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 12080:2025, Railway applications — Axleboxes — Rolling bearings
EN 12081:2025, Railway applications — Axleboxes — Lubricating greases
EN 12082-1:2025, Railway applications — Axleboxes — Part 1: Test procedures
EN 15663:2017+A2:2024, Railway applications — Vehicle reference masses
ISO 1817:2024, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
axlebox
assembly consisting of the following major components: rolling bearing(s), grease, seal(s) and box
housing
Note 1 to entry: Further components such as axle end cap components, box cover(s), distance rings, fasteners,
labyrinth(s) may be also part of the assembly but are not considered as major components. Their presence depends
on the axlebox type design.
3.2
box housing
structural component which contains rolling bearing(s), seal(s) and grease. It may consist of several
components such as an upper part, a lower part and/or bearing sleeve
3.3
rolling bearing
bearing operating with rolling motion between the parts, supporting load and moving in relation to each
other
3.4
cartridge bearing
rolling bearing with two or more rows of rolling elements within a self-contained unit, greased and
equipped with integral seals
3.5
grease
semi-solid lubricant, which consists of a thickener and additives dispersed in lubricating oil
3.6
seal
component that protects the rolling bearing(s) against ingress of water and dust and retains grease in the
rolling bearing(s)
3.7
roller set
assembly of cage and rollers
3.8
inboard bearing row
with reference to an axlebox with more than one bearing row designates the bearing row closer to the
center of the wheelset or the test rig
3.9
inboard application
with reference to the vehicle or application, designates a configuration with rolling bearings that are
positioned on a wheelset axle between the wheels of a wheelset
3.10
outboard bearing row
with reference to an axlebox with more than one bearing row, designates the bearing row that is next to
the inboard bearing row to the outside direction
3.11
outboard application
with reference to the vehicle or application, designates a configuration with rolling bearings that are
positioned on wheelset axle ends, outside of the space between the wheels of a wheelset
3.12
deployment process
methodical procedure of introducing an axlebox or a change to an axlebox into vehicle service
3.13
rolling bearing type
designation of the rolling bearing or cartridge bearing according to the shape of the rolling elements
EXAMPLE Tapered roller bearing, cylindrical roller bearing, and spherical roller bearing.
3.14
rolling bearing design
designation of a specific rolling bearing or cartridge bearing design within a rolling bearing type, bearing
design is a subset of a bearing type
EXAMPLE WJ/WJP 130x240x80 P.C3
3.15
rolling bearing internal design
inner geometry of the bearing which includes the inner macro geometry including roller dimensions, ring
and roller angle and inner micro geometry including raceway crowning
3.16
tightness
resistance against contaminant ingress in compliance with test specification
4 Deployment Procedure
4.1 General requirements
There are two types of deployment procedures:
— complete deployment procedure, type C; corresponding to a complete procedure as specified in 4.2;
— reduced deployment procedure, type R; corresponding to a reduced procedure as specified in 4.3;
NOTE 1 In case a change is to be deployed, usually the customer specifies the type of deployment procedure
based on a documented risk assessment. Table 2 is intended to provide guidelines for this risk assessment.
NOTE 2 The deployment applies to the axlebox or the change, not to any of its specific major components, see
terms and definitions.
The flow chart in Figure 1 gives an overview of the deployment procedure.

Figure 1 — deployment procedure stages
4.2 Complete procedure, type C
4.2.1 General
The type C deployment procedure consists of three successive stages.
4.2.2 Stage 1
Interface and necessary details of the major axlebox components shall be documented in the technical
specification.
The technical data sheet of the lubricating grease stating the main characteristics according to
EN 12081:2025 shall be documented.
The rolling bearing specification according to EN 12080:2025 shall be documented. The bearing rolling
contact fatigue life shall be evaluated for the intended application.
NOTE 1 Usually the customer provides the interface drawings and the manufacturer the detail drawings.
NOTE 2 Rolling contact fatigue life can for example be evaluated according to ISO 281:2007, ISO 16281:2025 or
further methods developed by the component
...