SIST EN 14535-1:2019

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 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.

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

Dieses Dokument legt die Anforderungen an die Konstruktion und Abmessungen der Bremsscheibe fest.
Dieses Dokument gilt für Bremsscheiben, die auf dem Schienenfahrzeugradsatz oder auf einer Antriebswelle durch einen zylindrischen oder konischen Presssitz aufgepresst oder geschrumpft sind.
Dieses Dokument gilt für Bremsscheiben, die 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 document spécifie les exigences à respecter pour la conception et les dimensions de disques de frein.
Le présent document est applicable aux disques de frein calés ou frettés sur essieu ou sur arbre moteur de matériel roulant ferroviaire par emmanchement conique ou cylindrique.
Le présent document s'applique aux disques ayant une ou plusieurs couronnes, 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
• ICS: 45.040 - Materials and components for railway engineering
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Mar-2019
• Due Date: 20-May-2019
• Completion Date: 22-Mar-2019
• Directive: 112-TP - Pravilnik o zavorah, varnostnih napravah in opremi železniških vozil
• Directive: 2007-01-6194 - Pravilnik o zavorah, varnostnih napravah in opremi železniških vozil
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Directive: 2011-01-2104 - Pravilnik o tehnični skladnosti tirnih vozil
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: EN 14535-1:2019 - 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

Relations

• Replaces: SIST EN 14535-1:2006+A1:2011 - 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
• Effective Date: 13-Mar-2019
• Revised: SIST EN 14535-1:2006+A1:2011 - 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
• Effective Date: 04-Feb-2015

Overview

EN 14535-1:2019 - Railway applications: Brake discs pressed or shrunk onto the axle or drive shaft - defines design, dimensional and quality requirements for axle- or drive-shaft-mounted brake discs for railway rolling stock. The standard applies to discs fitted by a cylindrical or conic tapered interference fit and to assemblies with one or more brake rings, each having two axially separated friction faces. EN 14535-1:2019 replaces earlier editions and forms Part 1 of the EN 14535 series covering brake discs for rail vehicles.

Key topics

• Scope and definitions: clear definitions of brake disc, brake ring, hub, ventilated/non-ventilated, single/double/split/segmented discs and performance class.
• Design and materials: requirements to ensure discs withstand braking torque, rotational speed, thermal energy dissipation, environmental stresses, noise and wear while maintaining safety and interchangeability.
• Mounting details: rules for interference-fit hubs (cylindrical or tapered), hub bore design, access for axle servicing and steps to prevent detachment under degraded conditions up to the maximum permissible rotational speed.
• Dimensions and tolerances: prescribed major dimensions, hub bore arrangements, finishing, balance and dimensional tolerances to ensure compatibility and safe operation.
• Testing and quality approval: type tests, application tests, verification procedures, documentation, traceability and record-keeping required for conformity and ongoing quality control.
• Marking and packaging: identification, traceability and protective packing requirements for transportation and storage.
• Informative annexes: additional testing guidance and non‑destructive testing access considerations.

Applications

EN 14535-1 is used to specify, design and verify axle-mounted brake discs for:

• Passenger and freight rolling stock brake systems
• New vehicle design and component procurement
• Retrofit and replacement of brake discs on existing vehicles
• Maintenance, inspection and life‑cycle management of brake components

By standardizing dimensions, fits and quality checks, the document helps manufacturers, integrators and operators achieve safe, interoperable and maintainable brake disc assemblies.

Who should use this standard

• Brake disc and hub designers and manufacturers
• Rolling-stock OEMs and system integrators
• Maintenance and reliability engineers
• Procurement teams specifying component acceptance criteria
• Certification bodies and testing laboratories

Related standards

• EN 14535-2 (brake discs mounted onto the wheel)
• EN 14535-3 (performance of the disc and friction couple; classification)
• EN 14478 (braking vocabulary)
• EN ISO 4287 (surface texture) and EN ISO 228-1 (thread standards)

Keywords: EN 14535-1:2019, railway brake discs, axle-mounted brake discs, interference fit, brake ring, hub bore, brake disc dimensions, railway rolling stock standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2019
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SIST EN 14535-1:2006+A1:2011
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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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

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

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.
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.
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
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
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
a
R Refer to EN ISO 4287. μm
z
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;
— 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.
a) Single brake disc symmetrical b) Single brake disc asymmetrical

c) Double brake disc
Key
...