Railway applications - Brake discs for railway rolling stock - Part 1: Brake discs pressed or shrunk onto the axle or drive shaft, dimensions and quality requirements

This draft European standard specifies requirements for the design and dimensions of the brake disc.
This draft European standard applies to discs mounted at the axle or drive-shaft of railway rolling stock by a cylindrical or conic tapered interference fit.
For each discrete unit so fitted, one or more disc brake rings, each having two axially separated friction faces, may be deployed.

Bahnanwendungen - Bremsscheiben für Schienenfahrzeuge - Teil 1: Wellenbremsscheiben, aufgepresst oder geschrumpft, Abmessungen und Qualitätsanforderungen

Dieser Entwurf der Europäischen Norm legt die Anforderungen an die Konstruktion und Abmessungen der Bremsscheibe fest.
Dieser Entwurf der Europäischen Norm gilt für Bremsscheiben, die auf dem Schienenfahrzeugradsatz oder auf einer Antriebswelle durch einen zylindrischen oder konischen Presssitz befestigt sind.
Jede einzelne derart befestigte Einheit kann einen oder mehrere Bremsringe mit je zwei axial getrennten Reibflächen aufweisen.

Applications ferroviaires - Disques de frein pour matériel roulant ferroviaire - Partie 1 : Disques de frein calés ou frettés sur essieu ou sur arbre moteur, dimensions et exigences de qualité

Le présent projet de Norme européenne spécifie les exigences à respecter pour la conception et les dimensions de disques de frein.
Le présent projet de Norme européenne est applicable aux disques de frein montés sur l’essieu ou sur l’arbre moteur de matériel roulant ferroviaire par emmanchement conique ou cylindrique.
Chaque unité ainsi fixée peut comprendre une ou plusieurs couronnes de disque de frein, chaque couronne ayant deux surfaces de friction séparées axialement.

Železniške naprave - Kolutne zavore za železniška vozila - 1. del: Kolutne zavore (diski), nameščene na osi s hladnim ali vročim postopkom, mere in zahteve za kakovost

Ta osnutek evropskega standarda določa zahteve za načrtovanje in mere kolutnih zavor (diskov).
Ta osnutek evropskega standarda se uporablja za kolutne zavore, nameščene na os ali pogonsko gred železniškega vozila z valjasto ali stožčasto nadmero.
Za vsako posamezno tako opremljeno enoto se lahko uvede eden ali več obročev za kolutne zavore, pri čemer ima vsak dve osno ločeni čelni torni ploskvi.

General Information

Status
Published
Public Enquiry End Date
31-Dec-2016
Publication Date
21-Mar-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Mar-2019
Due Date
20-May-2019
Completion Date
22-Mar-2019

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 14535-1:2019
01-maj-2019
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SIST EN 14535-1:2006+A1:2011

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GLVNL QDPHãþHQHQDRVLVKODGQLPDOLYURþLPSRVWRSNRPPHUHLQ]DKWHYH]D
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Railway applications - Brake discs for railway rolling stock - Part 1: Brake discs pressed

or shrunk onto the axle or drive shaft, dimensions and quality requirements
Bahnanwendungen - Bremsscheiben für Schienenfahrzeuge - Teil 1:
Wellenbremsscheiben, aufgepresst oder geschrumpft, Abmessungen und
Qualitätsanforderungen

Applications ferroviaires - Disques de frein pour matériel roulant ferroviaire - Partie 1 :

Disques de frein calés ou frettés sur essieu ou sur arbre moteur, dimensions et
exigences de qualité
Ta slovenski standard je istoveten z: EN 14535-1:2019
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
SIST EN 14535-1:2019 en,fr,de

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

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SIST EN 14535-1:2019
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SIST EN 14535-1:2019
EN 14535-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 45.060.01 Supersedes EN 14535-1:2005+A1:2011
English Version
Railway applications - Brake discs for railway rolling stock
- Part 1: Brake discs pressed or shrunk onto the axle or
drive shaft, dimensions and quality requirements

Applications ferroviaires - Disques de frein pour Bahnanwendungen - Bremsscheiben für

matériel roulant ferroviaire - Partie 1 : Partie 1 : Schienenfahrzeuge - Teil 1: Wellenbremsscheiben,

Disques de frein calés ou frettés sur essieu ou sur arbre aufgepresst oder geschrumpft, Abmessungen und

moteur, dimensions et exigences de qualité Qualitätsanforderungen
This European Standard was approved by CEN on 14 October 2018.

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, 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 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14535-1:2019 E

worldwide for CEN national Members.
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Symbols and abbreviations ......................................................................................................................... 7

5 Requirements ................................................................................................................................................... 7

5.1 General ................................................................................................................................................................ 7

5.2 Materials, design and manufacture .......................................................................................................... 7

5.3 Dimensions ........................................................................................................................................................ 8

5.3.1 Brake disc........................................................................................................................................................... 8

5.3.2 Hub bore .......................................................................................................................................................... 10

5.3.3 Hub oil injection arrangement ................................................................................................................ 11

5.3.4 Access to the axle .......................................................................................................................................... 12

5.3.5 Indication of disc wear limits .................................................................................................................. 12

5.3.6 Finishing .......................................................................................................................................................... 13

5.3.7 Balance ............................................................................................................................................................. 13

5.3.8 Dimensional tolerances ............................................................................................................................. 13

5.4 Installation ..................................................................................................................................................... 14

6 Test methods ................................................................................................................................................. 14

6.1 Type tests ........................................................................................................................................................ 14

6.2 Application test ............................................................................................................................................. 14

7 Quality approval ........................................................................................................................................... 14

7.1 Verification ..................................................................................................................................................... 14

7.2 Documentation .............................................................................................................................................. 15

7.3 Traceability .................................................................................................................................................... 15

7.4 Records ............................................................................................................................................................ 15

8 Designation..................................................................................................................................................... 15

9 Marking and packaging .............................................................................................................................. 18

9.1 Marking ............................................................................................................................................................ 18

9.2 Packing and protection .............................................................................................................................. 18

Annex A (informative) Further tests .................................................................................................................... 19

Annex B (informative) Access for non-destructive testing of axles .......................................................... 20

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

requirements of Directive 2008/57/EC aimed to be covered ..................................................... 21

Bibliography ................................................................................................................................................................. 23

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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
European foreword

This document (EN 14535-1:2019) 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 September 2019, and conflicting national standards

shall be withdrawn at the latest by September 2019.

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 14535-1:2005+A1:2011.

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 2008/57/EC.

For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of

this document.
Compared to the previous edition, the following changes have been made:
a) the standard’s scope has been modified;
b) normative references have been updated;
c) terms and definitions have been revised;

d) requirements on materials, design, dimensions and installation have been revised;

e) requirements on testing have been revised;
f) requirements on designation and markings have been revised;
g) Annexes have been revised.

The EN 14535 series, Railway applications - Brake discs for railway rolling stock, consists of the

following parts:

— Part 1: Brake discs pressed or shrunk onto the axle or drive shaft, dimensions and quality

requirements;

— Part 2: Brake discs mounted onto the wheel, dimensions and quality requirements;

— Part 3: Brake discs, performance of the disc and the friction couple, classification.

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 14535-1:2019
EN 14535-1:2019 (E)
Introduction

The requirements given in this document cannot be written in sufficient detail to ensure good

workmanship or proper construction. Each manufacturer is therefore responsible for taking every

necessary step to make sure that the quality of design, workmanship and construction is such as to

ensure accordance with good engineering practice.
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
1 Scope

This document specifies requirements for the design and dimensions of the brake disc.

This document applies to discs pressed or shrunk onto the axle or drive shaft of railway rolling stock by

a cylindrical or conic tapered interference fit.

This document applies to discs having one or more disc brake rings, each having two axially separated

friction faces.
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 14478, Railway applications – Braking - Generic vocabulary

EN 14535-3:2015, Railway applications - Brake discs for railway rolling stock – Part 3: Brake discs,

performance of the disc and the friction couple, classification

EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,

tolerances and designation (ISO 228-1)

EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 14478 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
brake disc

rotor having co-planar annular friction faces to which brake pads are applied in order to develop a

braking torque

Note 1 to entry: The brake disc dissipates braking energy resulting from vehicle or train deceleration.

3.2
friction face

surface of a disc that provides the friction interface for transferring the brake force

3.3
brake ring
portion of the disc having friction faces
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
3.4
hub

portion of the disc having an internal cylindrical or conical surface, the hub bore, for interference fit

engagement with the axle or drive shaft

Note 1 to entry: The hub can be constructed integrally with the brake ring (monobloc disc) or connected to it by

a separate linking arrangement.
3.5
non ventilated disc

disc having a continuity of material or materials allowing in that volume no flow of air between the

friction faces
3.6
ventilated disc

disc in which passages to conduct a flow of cooling air are located between the friction faces of the

brake ring
Note 1 to entry: The airflow is usually occasioned by the rotation of the disc.
3.7
single disc
disc in which one brake ring is associated with one hub
3.8
double disc
disc in which one hub supports two axially spaced brake rings
3.9
split disc
disc in which the brake ring is separated in two halves
3.10
segmented disc
disc in which the brake ring is separated in more than two parts
3.11
brake disc temperature
arithmetic average value of the measured temperatures of the disc friction face

Note 1 to entry: The temperatures are measured by six sensors as described in EN 14535-3:2015, 8.1.

3.12
maximum permissible disc temperature
highest operation temperature applied to the disc

Note 1 to entry: This may be expressed as an absolute peak value or as a nominal value over a defined period of

time.
3.13
maximum permissible rotational speed
highest speed applicable to the application
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
3.14
indirect actuation
brake in which the brake pad normal force is applied via a lever system
3.15
performance class

set of the values of braking energy, braking power and braking torque, related to the outer diameter,

width and type of the disc, at which it is type tested to demonstrate its capability to withstand these

conditions without exceeding the defined limits of structural degradation

Note 1 to entry: Discs are categorized into performance classes according to the tests stated in EN 14535-3.

3.16
technical specification

document, describing specific parameter and/or product requirements as an addition to the

requirements of this standard, including the final clause-by-clause agreement
4 Symbols and abbreviations
For the purposes of this document, the symbols and units given in Table 1 apply.
Table 1 — Symbols and units
Symbol Description Unit
d Diametrical dimension mm
R Refer to EN ISO 4287. μm
R Refer to EN ISO 4287. μm
R, r Radial dimension mm
gm⋅
U Imbalance
x Axial dimension mm
Ω Taper angle
5 Requirements
5.1 General

The discs are intended to be used as part of a friction brake and shall not suffer damage or degradation

other than normal wear, surface cracks and deformations of the friction face within permissible limits.

5.2 Materials, design and manufacture

The materials, design and manufacture of the disc shall, for all specified operating conditions, take into

account the following:
— the main dimensions given in Table 2;
— the rotational speed;
— the magnitude of the braking torque;

— the quantity of braking energy to be converted and dissipated and its rate of conversion and

dissipation;
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)

— the frictional working conditions, especially with the interaction with the brake pad;

— ventilation losses;
— noise;
— mass of disc;
— imbalance of disc;

— environmental influence, e.g. storage, transport, climatic, shock and vibration conditions;

— integrity, life and maintenance requirements of the disc, associated brake components, and brake

and vehicle systems.

Where a disc consists of more than one constructional element designed for in-service replacement of

the brake ring or part of it, the associated parts of that disc shall be interchangeable while the hub or

carrier remains installed on the axle or shaft within the vehicle.

The design shall be such as to prevent the detachment of any part of the disc at any speed up to and

including the maximum permissible rotational speed in all degraded conditions (e.g. wear, cracking) up

to the limit given in the technical specification.

If any special application conditions are necessary, they shall be specified and documented.

NOTE Take into consideration the clearance gauge of vehicle when the rail wheels are at their minimum

permitted diameter.
5.3 Dimensions
5.3.1 Brake disc

The disc major dimensioning shall be as shown in Figure 1 and the preferred ranges of major

dimensions as given in Table 2.
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SIST EN 14535-1:2019
EN 14535-1:2019 (E)
a) Single brake disc symmetrical b) Single brake disc asymmetrical
c) Double brake disc
Key
...

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