EN 15566:2016

SLOVENSKI STANDARD
01-november-2016
1DGRPHãþD
SIST EN 15566:2009+A1:2010
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Railway applications - Railway rolling stock - Draw gear and screw coupling
Bahnanwendungen - Schienenfahrzeuge - Zugeinrichtung und Schraubenkupplung
Applications ferroviaires - Matériel roulant ferroviaire - Organes de traction et tendeur
d'attelage
Ta slovenski standard je istoveten z: EN 15566:2016
ICS:
45.060.10 9OHþQDYR]LOD Tractive stock
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15566
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2016
EUROPÄISCHE NORM
ICS 45.060.01 Supersedes EN 15566:2009+A1:2010
English Version
Railway applications - Railway rolling stock - Draw gear
and screw coupling
Applications ferroviaires - Matériel roulant ferroviaire Bahnanwendungen - Schienenfahrzeuge -
- Organes de traction et tendeur d'attelage Zugeinrichtung und Schraubenkupplung
This European Standard was approved by CEN on 8 July 2016.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15566:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 7
Introduction . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Requirements for all types of draw gear and screw coupling. 13
4.1 Classification and designation . 13
4.2 Interaction coupling/buffer . 13
4.3 Interface dimension for freight wagons. 14
4.4 Life time . 15
5 Draw gear . 16
5.1 Draw gear components . 16
5.2 Draw hook and drawbar – Requirements . 18
6 Screw coupling . 18
6.1 General requirements . 18
6.2 Screw coupling – Requirements. 20
7 Elastic device . 20
7.1 Characteristics of elastic device . 20
7.2 Elastic device – Requirements . 21
Annex A (normative) Dynamic test (fatigue test) procedure . 22
A.1 Background . 22
A.2 Performance of the test . 22
A.2.1 Conditioning . 22
A.2.2 Dynamic test (fatigue test) . 22
A.2.3 Non-destructive tests . 24
A.2.4 Determination of residual strength . 24
A.2.5 Macrographic and Micrographic tests . 24
A.3 Criteria of acceptance . 24
Annex B (normative) Draw hook – dimensions. 25
Annex C (normative) Draw gear – Interface dimension . 26
Annex D (normative) Screw coupling components – dimensions . 27
Annex E (normative) Draw hook and drawbar – Requirements . 29
E.1 Physical characteristics . 29
E.1.1 Appearance . 29
E.1.2 Integrity . 29
E.1.3 Material examination . 29
E.2 Geometrical characteristics . 30
E.3 Mechanical characteristics . 30
E.3.1 Tensile test on test piece . 30
E.3.2 Resilience. 30
E.3.3 Hardness . 30
E.3.4 Tensile test on draw hook and draw bar . 30
E.3.5 Compressive test on draw hook for locomotives . 31
E.4 Marking . 31
E.5 Manufacture. 31
E.5.1 General on draw bars . 31
E.5.2 General on draw hooks . 31
E.5.3 Machining . 31
E.5.4 Heat treatment . 31
E.5.5 Rectification of defects. 32
E.6 Acceptance . 32
E.6.1 General . 32
E.6.2 Inspection of the draw hooks . 32
E.6.3 Inspection of draw bars . 37
E.6.4 Conclusion of the inspections . 38
E.7 Delivery . 38
E.7.1 Protection against oxidation . 38
E.7.2 Packaging . 38
Annex F (normative) Screw coupling and component parts – Requirements . 39
F.1 Material . 39
F.2 Physical characteristics . 39
F.2.1 Appearance . 39
F.2.2 Soundness . 39
F.2.3 Additional requirements for screw couplings . 40
F.3 Geometrical characteristics . 40
F.3.1 General . 40
F.3.2 Dimensions limited either by two unmachined or rough-machined surfaces or by
one unmachined or rough-machined surface . 40
F.3.3 Dimensions limited by two machined surfaces . 41
F.4 Mechanical characteristics . 41
F.4.1 Heat treatment . 41
F.4.2 Hardness . 41
F.4.3 Values for predetermined breaking loads for the weakest part. 41
F.4.4 Resilience . 42
F.4.5 Requirements for screw coupling . 42
F.4.6 Requirement for handle and trunnion . 43
F.5 Marking . 44
F.6 Manufacture . 44
F.6.1 Preparation of the materials . 44
F.6.2 Manufacture of the component parts . 44
F.7 Acceptance . 46
F.7.1 General . 46
F.7.2 Inspection of the manufacture . 46
F.8 Inspection of the materials, component parts and screw couplings . 46
F.8.1 Materials submission for acceptance . 46
F.8.2 Grouping into batches . 47
F.8.3 Nature and proportion of the tests . 47
F.8.4 Sampling and preparation of the samples and test pieces . 48
F.8.5 Carrying out of the checks and tests . 52
F.9 Completion of inspections. 53
F.10 Delivery. 54
F.10.1 Protection against oxidation . 54
F.10.2 Packing . 54
Annex G (normative) Elastic device – Requirements . 55
G.1 Rubber elastomer or other elastomer elastic device . 55
G.1.1 General . 55
G.1.2 Metal inserts requirements . 55
G.1.3 Elastomer requirements . 55
G.1.4 Static test . 57
G.1.5 Endurance test . 58
G.1.6 Bonding . 59
G.1.7 Inspection and Tests . 59
G.1.8 Markings . 60
G.2 Friction spring/Ring spring . 61
G.2.1 Manufacturer's marks . 61
G.2.2 Flexibility test . 61
G.2.3 Endurance test . 62
Annex H (normative) Marking . 63
H.1 General . 63
H.2 Marking of the screw coupling . 63
H.3 Draw gear . 64
H.4 Draw bar . 64
H.5 Summary of markings . 65
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2008/57/EC . 66
Bibliography . 68
Figures
Figure 1 — Force-stroke diagram for stored and absorbed energy . 12
Figure 2 — Support plate ― Interface dimension for freight wagons . 15
Figure 3 — Draw gear ― Assembly . 17
Figure 4 — Standard screw coupling with non-loosening hinged ball handle . 19
Figure 5 — Standard screw coupling with hinged handle with non-loosening upper rest . 20
Figure A.1 — Example of Load cycles Step 1 and Step 2 . 23
Figure B.1 — Draw hook . 25
Figure C.1 — Drawbar with “fork” and safety device . 26
Figure C.2 — Joint pin . 26
Figure D.1 — Coupling hook pin . 27
Figure D.4 — Shackle . 28
Figure E.1 — Location of the test samples . 34
Figure E.2 — Marking of the draw hook for the tensile test . 35
Figure E.3 — Location of the test samples . 37
Figure F.1 — Location of the measurement of the deformation of the screw coupling . 42
Figure F.2 — Test facility for the tensile test of the screw coupling . 43
Figure F.3 — Measurement of the screw coupling . 43
Figure F.4 — Permitted depth of the fold in thread profile . 45
Figure F.5 — Screw – test sample location . 49
Figure F.6 — Shackle – test sample location . 50
Figure F.7 — Coupling link – test sample location . 50
Figure F.8 — Trunnion nut (link fitting) – test sample location . 51
Figure F.9 — Trunnion nut (shackle fitting) – test sample location . 51
Figure F.10 — Pin – test sample location . 52
Figure G.1 — Elastic device – load cycle for endurance test . 58
Figure G.2 — Elastic device – Set up for endurance test . 59
Figure H.1 — Location of mark . 64
Figure H.2 — Mark dimension . 64
Tables
Table 1 — Classification of coupling by designation of the minimum breaking load . 13
Table A.1 — Pre-loading values . 22
Table A.2 — Condition of dynamic tests for all parts except screw coupling . 23
Table A.3 — Condition of dynamic tests for screw coupling . 24
Table E.1 — Requirements . 30
Table E.2 — Checks and tests . 33
Table F.1 — Requirements . 40
Table F.2 — load of link . 41
Table F.3 — Breaking load screw . 41
Table F.4 — Proportion of the tests – Finished products and component parts . 48
Table G.1 — Characteristics of the constituents . 55
Table G.2 — Nature of inspections and tests . 60
Table G.3 — Number of flexibility tests per batch of springs . 62
Table H.1 — Marking . 65
Table ZA.1 — Correspondence between this European Standard, the Commission
Regulation concerning the technical specification for interoperability relating to the
subsystem ‘rolling stock – freight wagons’ of the rail system in the European Union
and repealing Commission Decision 321/2013/EC, as amended by Commission
Regulation (EU) 2015/924 (published in the Official Journal L 150, 17.06.2015,
p.10); and Directive 2016/797/EC . 66
Table ZA.2 — Correspondence between this European Standard, the Commission regulation
(EU) No 1302/2014 of 18 November 2014 concerning the technical specification for
interoperability relating to the ‘rolling stock locomotives and passenger rolling
stock’ of the rail system in the European Union (published in the Official Journal L
356, 12.12.2014, p.228) and Directive 2008/57/EC . 67
European foreword
This document (EN 15566:2016) 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 March 2017, and conflicting national standards shall
be withdrawn at the latest by March 2017.
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 15566:2009+A1:2010.
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.
Modifications
Compared with EN 15566:2009+A1:2010 the following main changes have been done:
a) checking and revision of Clause 2 – Normative references;
b) modification in Clause 3 – working capacity (3.8) was deleted and intermediate coupling system for
permanent coupled wagons now defined as permanent coupling system;
c) in Clause 4, requirements for compressive loads for draw hook and draw gear rationalised and
explained;
d) in Clause 7, the required value changed into mandatory and given in SI-Unit;
e) changes in Annex A with respect to the implementation of the dynamic test;
— new specification of the test load for the residual strength;
— the macrographic and micrographic tests were added;
— acceptance criteria were added;
— modification in Table A.2 and A.3 (rows of survival probability and safety factor were deleted);
f) revision of Annex E and Annex F to get a similar structure and the requirements of the raw material
are defined in the new tables Table E.1 and Table F.1. The marking in Annex E and Annex F were
moved into the new Annex H – Marking;
g) revision of Annex G;
— specification of the maximum deviation of type test to serial test;
— revision of Table G.2;
h) new Annex H – Marking with the marking system for draw hook, draw gear, draw bar and screw
coupling as well the new Table H.1 – Marking as summary;
i) modification of the following figures:
— Figure 2 – Support plate;
— Figure 3 – Draw gear;
— Figure A.1 – Example of load cycles Step 1 and Step 2;
— Figure E.2 – Marking of the draw hook for the tensile test;
— Figure E.3 – Location of the test samples (item numbers);
— Figure F.7 – Coupling link – test samples location (item numbers);
— Figure F.8 and F.9 – Trunnion nut (item numbers);
— shifted Figures from Annex E and Annex F to Annex H;
j) editorial modifications.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Introduction
This European Standard is based on UIC 520, UIC 825, UIC 826, UIC 827-1 and UIC 827-2.
1 Scope
This standard specifies the requirements for the draw gear and screw coupling for the end of rolling
stock that has to couple with other rolling stock (freight wagons, locomotives, passenger vehicles .).
This standard covers the functionality, construction, interfaces and testing including pass/fail criteria
for draw gear and screw coupling.
The standard describes three categories of classification of draw gear and screw coupling, (1 MN,
1,2 MN and 1,5 MN).
Coupling systems between permanent coupled vehicle units are not in the scope of this standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 10021, General technical delivery conditions for steel products
EN 10025 (all parts), Hot rolled products of structural steels
EN 10079, Definition of steel products
EN 10083 (all parts), Steels for quenching and tempering
EN 10168, Steel products - Inspection documents - List of information and description
EN 10204, Metallic products - Types of inspection documents
EN 10228-1, Non-destructive testing of steel forgings - Part 1: Magnetic particle inspection
EN 10228-2, Non-destructive testing of steel forgings - Part 2: Penetrant testing
EN 10243 (all parts), Steel die forgings — Tolerances on dimensions
EN 10247, Micrographic examination of the non-metallic inclusion content of steels using standard
pictures
EN 10308, Non destructive testing - Ultrasonic testing of steel bars
EN ISO 148 (all parts), Metallic materials — Charpy pendulum impact test
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 643, Steels - Micrographic determination of the apparent grain size (ISO 643)
EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1)
EN ISO 6892-2, Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature (ISO
6892-2)
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1 including Cor
1)
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD
and 100 IRHD)
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 813, Rubber, vulcanized or thermoplastic — Determination of adhesion to a rigid substrate — 90
degree peel method
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient
or elevated temperatures
ISO 815-2, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low
temperatures
ISO 4967, Steel — Determination of content of non-metallic inclusions — Micrographic method using
standard diagrams
ISO 4968, Steel — Macrographic examination by sulfur print (Baumann method)
ISO 7619-1, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1:
Durometer method (Shore hardness)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
screw coupling system
system to connect two railway vehicles consisting of draw gear, draw hook and screw coupling
Note 1 to entry: The screw coupling system defined in this document is also designated UIC coupling.
3.2
draw gear
system consisting of an assembly of mechanical parts and absorber fixed on the railway vehicle which is
able to work in traction
Note 1 to entry: A representative drawing is given in Figure 3.
3.3
draw hook
mechanical part to transfer forces between draw gear and screw coupling
Note 1 to entry: Definition in EN 15020 “Rescue coupler”: part of a conventional and mechanical manual
coupling, also known as UIC draw hook.
3.4
screw coupling
mechanical system to connect to the draw hook of the adjacent railway vehicle including length
adjustment
3.5
Standard screw coupling
1 MN screw coupling defined on ERRI standard drawings 100M 3220 0001 and 100M 3220 0002 [16].
3.6
stored energy
W
e
energy (W ) stored by the draw gear for a given elasticity stroke
e
Note 1 to entry: It is represented, on the force-stroke diagram, by the hatched area lying between the
compressive curve, the axis of the abscissa and the straight line, perpendicular to the axis, corresponding to the
stroke under consideration (see Figure 1 a).
3.7
absorbed energy
W
a
energy (W ) absorbed by the draw gear for a given elasticity stroke
a
Note 1 to entry: It is represented, on the force-stroke diagram, by the hatched area lying between the
compressive curve and the return curve (see Figure 1 b)).

a) b)
Key
1 force in kN
2 stroke in mm
stored energy W in kJ
e
absorbed energy W in kJ
a
Figure 1 — Force-stroke diagram for stored and absorbed energy
3.8
damping
d
ratio of absorbed energy divided by stored energy
Note 1 to entry: It is calculated using the following equation:
W
a
d ⋅100 %
%
W
e
where:
d is the damping, in %;
%
W is the absorbed energy, in kJ;
a
W is the stored energy, in kJ.
e
3.9
minimum breaking load
minimum traction force which may lead to mechanical breaking
3.10
technical specification
document describing specific parameters and/or product requirements as an addition to the
requirements of this standard
4 Requirements for all types of draw gear and screw coupling
4.1 Classification and designation
Coupling systems are classified according to their minimum breaking load as specified in Table 1.
Table 1 — Classification of coupling by designation of the minimum breaking load
Coupling system Minimum breaking Maximum breaking Minimum breaking
designation load of the screw load of the screw load in traction of the
coupling coupling draw gear and draw
hook
MN MN
MN
1 MN 0,85 0,98 1,0
1,2 MN 1,02 1,18 1,2
1,5 MN 1,35 1,48 1,5
In case of longitudinal overloading the breaking point of the screw coupling system shall be either the
screw or the link of the screw coupling.
NOTE 1 The combination of a screw coupling with draw hooks and/or draw gear with higher breaking loads is
possible. The screw coupling system designation is defined by the screw coupling.
Any draw gear and any draw hook shall sustain a 0,05 MN compressive load. Draw gear and draw hook
for locomotives shall sustain a 0,3 MN compressive load.
NOTE 2 These compressive loads are needed for shunting operation and rescue operations.
4.2 Interaction coupling/buffer
To ensure that the train is able to negotiate curves at 150 m radius safely, the static characteristics of
draw gears and buffers should be coordinated.
In order to meet this requirement for vehicles, a guideline value of 250 kN should not be exceeded for
the compression force of a pair of buffers in contact in a curve of 150 m.
=
To determine the compression force for vehicles, the calculation method shown under section 3 of
RP 32 of ORE B 36 [17] may be used (the method described in this report is also applicable for coaches
and locomotives). This calculation method may also allow stress levels to be determined on smaller
radius curves. If the coupling practice creates pretension forces, these have to be taken into account.
NOTE 1 Using the calculation in curve according RP 32 of ORE B 36 [17] gives also confidence for an S curve of
150 m with an intermediate straight of 6 m.
NOTE 2 When the EN 16839 is published, these paragraphs or part of paragraph will not be relevant.
4.3 Interface dimension for freight wagons
Support plate interface dimensions for fixing of draw gear on freight wagons are defined in Figure 2.
Draw gear assemblies shall be interchangeable. The interchangeability only applies to complete draw
gear assemblies, not to single draw gear parts.
NOTE For other railway vehicles and for wagons operating on 1 524 mm track gauge, the arrangement could
be different and interchangeability is not required.

)
In preparation.
Dimensions in millimetres
Key
1 buffer fixing plate
NOTE The centreline of the draw gear (screw coupling) is also the centreline of the automatic coupler.
Figure 2 — Support plate ― Interface dimension for freight wagons
4.4 Life time
Draw gear (excluding the elastic device), draw hooks, and screw coupling shall be designed
commensurate with the service life of a vehicle. Unless otherwise specified, the service life shall be 30
years.
Evidence shall be provided by appropriate means such as service experience, a dynamic test or by Finite
Element Analysis (FEA). If a dynamic test is required, it shall be carried out according to the test
procedure described in Annex A.
NOTE 1 The FEA and the dynamic test do not give indication of the real life time of a component in operation.
NOTE 2 Life time test qualifies the product and the manufacturer.
5 Draw gear
5.1 Draw gear components
Draw gear assembly see Figure 3 as an example.
The interface dimensions of the draw gear are given in Annex B and Annex C.
Components of a standard draw gear for wagons assembled with draw hook are:
— Draw hook see Figure B.1;
— Drawbar interface dimensions see Figure C.1;
— Joint pin interface dimensions see Figure C.2;
— Elastic device see Clause 7;
— Support plate see 4.3.
Key
1 draw hook (not a part of the draw gear)
2 drawbar
3 joint pin
4 support plate
5 elastic device
6 underframe
Figure 3 — Draw gear ― Assembly
5.2 Draw hook and drawbar – Requirements
Requirements are defined in Annex E.
6 Screw coupling
6.1 General requirements
The mass of the screw coupling shall not exceed 36 kg without coupling hook pin (see item 1 on
Figure 4 and Figure 5).
The screw coupler assembly for “standard screw coupling” with non-loosening hinged ball handle shall
be as shown in Figure 4.
The screw coupler assembly for “standard screw coupling” with hinged handle with non-loosening
upper rest shall be as shown in Figure 5.
NOTE “Standard screw coupling” is the name of the 1 MN screw coupling defined on ERRI standard drawings
100M 3220 0001 and 100M 3220 0002 [16].
The coupling length measured from inside the loop of shackle to the coupling hook pin axis of the
coupling screw and draw hook shall comply with the following conditions:
+10
— for the fully loosened coupling: (986 ) mm;
−5
— for the fully tightened coupling: (750 ± 10) mm.
Key
1 coupling hook pin
2 coupling links
3 screw
4 trunnion for ball handle
5 handle housing
6 hinged ball handle
7 trunnion
8 shackle
D +10
greatest length for the fully loosened coupling (986 ) mm
−5
D smallest length for the fully tightened coupling (750 ± 10) mm
Figure 4 — Standard screw coupling with non-loosening hinged ball handle
Key
1 coupling hook pin
2 coupling links
3 screw
4 trunnion for handle with top-mounted rest
5 handle housing
6 hinged handle
7 trunnion
8 shackle
D +10
greatest length for the fully loosened coupling (986 )mm
−5
D smallest length for the fully tightened coupling (750 ± 10) mm
Figure 5 — Standard screw coupling with hinged handle with non-loosening upper rest
Functional dimensions of screw coupling components shall be as given in Annex D.
6.2 Screw couplin
...