EN 14535-2:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnanwendungen - Bremsscheiben für Schienenfahrzeuge - Teil 2: Bremsscheiben, die an einem Rad befestigt werden, Abmessungen und QualitätsanforderungenApplications ferroviaires - Disques de frein pour matériel roulant ferroviaire - Partie 2: Disques de frein montés sur la roue, dimensions et exigences de qualitéRailway applications - Brake discs for railway rolling stock - Part 2: Brake discs mounted onto the wheel, dimensions and quality requirements45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 14535-2:2011SIST EN 14535-2:2011en,fr,de01-november-2011SIST EN 14535-2:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14535-2
June 2011 ICS 45.060.01 English Version
Railway applications - Brake discs for railway rolling stock - Part 2: Brake discs mounted onto the wheel, dimensions and quality requirements
Applications ferroviaires - Disques de frein pour matériel roulant ferroviaire - Partie 2: Disques de frein montés sur la roue, dimensions et exigences de qualité
Bahnanwendungen - Bremsscheiben für Schienenfahrzeuge - Teil 2: Bremsscheiben, die an einem Rad befestigt werden, Abmessungen und Qualitätsanforderungen This European Standard was approved by CEN on 4 May 2011.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14535-2:2011: ESIST EN 14535-2:2011

Experimentation in service (checking of the operating requirement) category C2 test . 23Annex ZA (informative)
Relationship between this European Standard and the
Essential Requirements of EU Directive 2008/57/EC . 24Bibliography . 27 SIST EN 14535-2:2011

1) To be published. SIST EN 14535-2:2011

2) To be published. SIST EN 14535-2:2011

Discs are categorized into the performance classes according to the tests to be covered in prEN 14535-33): Brake discs, performance of the disc and of the pad and disc friction couple, classification. 3.16 braking energy energy dissipated per disc 3.17 braking torque torque per disc generated by the brake calliper and the pad friction value 3.18 braking power braking energy per unit time 4 Symbols For the purpose of this European Standard, the following symbols apply. Table 1 — Symbols and units Symbol Description Unit d Diametrical dimension mm Ra Surface roughness (arithmetical mean deviation of the assessed profile) µm Rz Surface roughness (maximum height of profile) µm U Imbalance g · m x Axial dimension mm
5 Items to be agreed between contracting parties and documented 5.1 Information to be supplied The following information to be supplied shall be fully documented. For compliance with the standard both the common requirements specified throughout the standard and the following documented items shall be satisfied:  any special conditions for manufacture and any special characteristics for the materials used (6.2,
Note 1);
3) To be published. SIST EN 14535-2:2011

Key View Denomination Fastening area position A Outer Close to wheel rim B Central Middle of the web C Inner Close to wheel hub D Hub Directly to the wheel hub Figure 1 — Disc, definition of fastening areas SIST EN 14535-2:2011

a) Attachment on web of the wheel
b) Attachment on hub of the wheel
Figure 2 — Disc major interface measures SIST EN 14535-2:2011

1 040 mm, 1 085 mm other diameters from 550 mm to
1 100 mm in any gradation d3 minor diameter of brake ring If d_1 < 660 mm Æ d_3 ≤ 0,56 × d_1 If d_1 ≥ 660 mm Æ d_3 = d_1 – 290 mm any other smaller size d2 fastening area pitch diameter
Fastening on wheel web to be adapted with the wheel design to be adapted with the wheel design Fastening on wheel hub
to be adapted with the wheel design to be adapted with the wheel design d4 fastening area bore diameter to be adapted with the wheel design d to be adapted with the wheel design dx1 brake ring width c
– ventilated (135 – max. wheel web width)/2 any other – non-ventilated distance of the mounting faces any other
depending on wheel design wheel web width
depending on wheel design a The preferences for dimensions are individually exclusive, e.g.: a particular disc could have a major brake ring diameter of 650 mm (1st preference) combined with a brake ring width of 70 mm (2nd preference), being thereby 2nd preference. Wherever possible, specify 1st preference dimensional combinations. b In some forms of disc construction the friction face major diameter may be less than the brake ring major diameter. c An offset may be employed when the wheel web is not associated symmetrically to the wheel rim. d See EN 13260 [3], EN 13261 [4] and EN 13262 [5]
6.3.2 Access to the wheel An access to the wheel for testing and checking the wheel web without dismantling of the disc shall be provided if required. The appropriate envelope dimensions for such access shall be specified. NOTE Generally, the specification is given by the purchaser. 6.3.3 Indication of disc wear limits Unless otherwise agreed between the contracting parties, a spigot of the form shown in Figure 3 shall be present on the disc inside and outside circumference to indicate the limit of acceptable wear. SIST EN 14535-2:2011

Key s amount of maximum permitted wear Figure 3 — Wear limit indication spigot 6.3.4 Finishing The surface roughness shall be such as to avoid unacceptable stress rise. For the friction faces and fastening area bore shall be:  friction faces:
Rz ≤ 16 µm;  contact faces to the wheel:
Rz ≤ 25 µm. NOTE Any other requirement for surface roughness, for example to verify the Ra to facilitate non-destructive testing, should be specified. Generally, the specification is given by the purchaser. The values should be given in the required evaluation method (Ra or Rz). Corners at friction faces with holes and gaps between wear parts may be chamfered 45° to a depth of at leas
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