EN 12080:2017/FprA1

SLOVENSKI STANDARD
SIST EN 12080:2017/oprA1:2021
01-maj-2021
Železniške naprave - Ohišja ležajev kolesnih dvojic - Kotalni ležaji - Dopolnilo A1
Railway applications - Axleboxes - Rolling bearings
Bahnanwendungen - Radsatzlager - Wälzlager
Applications ferroviaires - Boîtes d'essieux - Roulements
Ta slovenski standard je istoveten z: EN 12080:2017/prA1
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/oprA1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 12080:2017/oprA1:2021
SIST EN 12080:2017/oprA1:2021
DRAFT
EUROPEAN STANDARD
EN 12080:2017
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
March 2021
ICS 21.100.20; 45.040
English Version
Railway applications - Axleboxes - Rolling bearings
Applications ferroviaires - Boîtes d'essieux - Bahnanwendungen - Radsatzlager - Wälzlager
Roulements
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 256.

This draft amendment A1, if approved, will modify the European Standard EN 12080:2017. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12080:2017/prA1:2021 E
worldwide for CEN national Members.

SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
Contents Page
European foreword . 3
1 Modification to the European foreword . 4
2 Modification to Clause 2, Normative references . 4
3 Modification to 4.2, Technical specification content . 4
4 Modification to 6.3, Traceability . 5
5 Modification to 11.2, Marking of rings for cylindrical roller bearings (CRB) . 5
6 Modification to 11.3, Marking of cartridge bearings for axleboxes . 5
7 Modification to 12.1, Inspection plan . 5
8 Modification to Annex C, C.3, Equipment . 5
9 Modification to Annex D, D.2.4, Conditioning . 5
10 Modification to Annex D, D.3.1.1, General. 5
11 Modification to Annex D, D.3.1.2, Inspection frequency for series production . 8
12 Modification to Annex D, D.3.2, Moisture content . 8
13 Modification to Annex D, D.3.4.3, Burrs . 8
14 Modification to Annex D, D.3.5 Sub-surface quality . 8
15 Modification to Annex ZA . 10
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of Directive (EU) 2016/797 aimed to be covered . 11

SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
European foreword
This document (EN 12080:2017/prA1:2021) 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 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 2016/797/EC.
For relationship with EU Directive 2016/797/EC, see informative Annex ZA, which is an integral part of
EN 12080:2017.
SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
1 Modification to the European foreword
Add the following item in the list of changes:
— 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 2016/797/EC
2 Modification to Clause 2, Normative references
Add the following reference:
ISO 15512:2016, Plastics — Determination of water content
3 Modification to 4.2, Technical specification content
Replace “18) selection of mechanical testing method for cages of polymeric material (see D.4.1)” with:
“18) selection of mechanical testing method for cages of polymeric material (see D.4.1) and selection if
conditioning shall be used or not for polymer cages (See D.2.4)
SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
4 Modification to 6.3, Traceability
Replace ” Chemical analysis (all elements)” with:
Chemical analysis (all elements having content limitations according to ISO 683-17)
Delete spacing before comma accordingly:
“Name, manufacturer”;
5 Modification to 11.2, Marking of rings for cylindrical roller bearings (CRB)
Add the following sentence at the end of 11.2, before Figure 1:
“Deviations from marking on “Chamfer side” according to Figure 1 — Marking of CRB inner rings, shall
be defined in the technical specification according to Clause 4.”
6 Modification to 11.3, Marking of cartridge bearings for axleboxes
Add the following sentence at the end of 11.3, before Figure 2:
Deviations in the location of the marking for cartridge bearings shall be defined in the technical
specification according to Clause 4.
7 Modification to 12.1, Inspection plan
Replace the following footnote h in Table 3 “For ingot casting once every steel melt. For continuous casting
for beginning, middle and end of the casting process. Samples to be taken after forging and heat treatment
on forged bars.” with:
Every melt for ingot cast steel and continuously cast steel. For continuously cast steel, the specimens shall
preferably be from the start and end of the cast. The specimens shall be taken from rolled or forged bar
and shall be hardened and tempered to a minimum of HV350 prior to polishing.
8 Modification to Annex C, C.3, Equipment
Replace ” a sensor with a differential winding”; with:
“a suitable sensor to detect reference artificial defect as described in C.4.3.1”;
9 Modification to Annex D, D.2.4, Conditioning
Replace ” Conditioning shall be performed at the cage manufacturer.” with:
“Conditioning shall be performed at the cage or bearing manufacturer if specified in Clause 4.”
10 Modification to Annex D, D.3.1.1, General
Replace “Samples from the polymeric cages shall be taken from suitable points that are deemed critical
from an injection moulding perspective, such as the area connecting to the cage bar, areas with maximum
wall thickness or material agglomerations. At least one sample shall be taken from one cage. ” with:
“Samples from the polymeric cages shall be taken from suitable points that are deemed critical from an
injection moulding perspective, such as the area connecting to the cage bar, areas with maximum wall
thickness or material agglomerations. At least one sample shall be taken from one cage. Sample frequency
shall be once per batch of cages produced. Samples for test of chemical composition, viscosity index and
density can be taken once per batch of cages produced or per material batch.
SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
The term “Approval” in Table D.1 refers to Annex E and the term “Series” in Table D.1 refers to series
production.”
Replace the title of Table D.1 with:
“Table D.1 — Requirements and test method for polymer cages”
Replace Table D1 with:
SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
Material
Property Requirements Test Approval Series
b
Moisture content (after 1 – 2,5 % D.3.2 Yes Yes
conditioning if required -
D.2.4)
c a g
Chemical composition Yes Yes
c g
Melting point ± 5ˆ[°C] EN ISO 11357-3 Yes Yes
c 3 g
Viscosity index ± 30 [cm /g], Solvent: formic acid 90 % or EN ISO 307 Yes Yes
sulphuric acid 96 %
c g
Density ± 0,025 g/cm3 EN ISO 1183-1 or Yes Yes
EN ISO 1183-2
Fillers
Property Requirements Test Approval Series
c
Rate of glass fibres ± 2,5 % EN ISO 3451- 1 Yes Yes
EN ISO 1172
Length of glass fibres 0,1 to 1,0 mm for 90 % of the glass fibres D.3.3 Yes No
Diameter of glass fibres 12 ± 3 µm on average value of D.3.3 Yes No
measurements
Mechanical tests for injection approval
Property Requirements Test Approval Series
e
Bending test on cage or At least 90 % of Method agreed D.4 – at least one of Yes Yes
(Clause 4) these three tests is
Tension test on cage
f
required
body or
Tension test on cage bar
Mechanical tests for material approval
Impact strength or un- ≥ 40 kJ/m EN ISO 179/1eU Yes No
e f
notched Charpy impact See and
strength on the test
specimen
c
Bending strength on the > 90 % of reference value EN ISO 178 Yes No
e f
test specimen and
Thermal ageing in grease To be performed at customer's request D.5 Yes No
or oil bath (Clause 4, test specimens allowed)
Visual inspection
Property Requirements Test Approval Series
Sub-surface quality See D.3.5 D.4 Yes Yes
Surface quality see D.3.4 D.3.4.2 Yes Yes
a
Suitable methods such as thermal analysis, infrared spectroscopy or gas chromatography are used to identify and determine the
chemical composition and the components of the material used for the polymeric cage.
b
Inspection frequency is minimum two samples per batch or annually, to be agreed according to Clause 4.
c
Material data sheet or inspection certificate 3.1 from the cage material supplier documented in accordance to Clause 4.
d
Reference established either on the initial samples (new cage) or on existing parts for cage already produced. documented in
accordance to Clause 4.
e
Sample moisture content < 0,1 % according to D.3.2.
f
Separately manufactured test specimens using the same granulate batch may be used if the cage to be tested does not provide
sufficient material to test according to EN ISO 179-1.
g
Once per batch of cages or material
SIST EN 12080:2017/oprA1:2021
EN 12080:2017/prA1:2021 (E)
11 Modification to Annex D, D.3.1.2, Inspection frequency for series production
Replace “The inspection frequency shall be based on the batch size, i.e. for a batch size of ≤ 5,000 cages
two cages each at 10 %, 50 % and 100 % of the batch size > 5,000 two cages each at 10 %, 30 %, 50 %, 70
% and 100 % of the batch.” with:
“Unless otherwise specified in Table D.1 the inspection frequency shall be based on the batch size, i.e. for
a batch size of ≤ 5 000 cages two cages each at 10 %, 50 % and 100 % of the batch size > 5 000 two cages
each at 10 %, 30 %, 50 %, 70 % and 100 % of the batch.”
12 Modification to Annex D, D.3.2, Moisture content
Replace “In case of disputes, drying for 96 h at 110 °C and approx. 250 mbar is required (see
EN ISO 179-1).” with:
“In case of disputes, drying for 96 h at 110 °C and ap
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