SIST ISO 12046:2013

SLOVENSKI STANDARD
SIST ISO 12046:2013
01-december-2013
1DGRPHãþD
SIST ISO 12046:1997
Jermenski pogoni - Zobati jermenski pogoni - Avtomobilski jermeni - Ugotavljanje
fizikalnih lastnosti
Synchronous belt drives - Automotive belts - Determination of physical properties
Transmissions synchrones par courroies - Courroies pour la construction automobile -
Détermination des caractéristiques physiques
Ta slovenski standard je istoveten z: ISO 12046:2012
ICS:
21.220.10 Jermenski pogoni in njihovi Belt drives and their
deli components
43.060.10 Blok motorja in notranji deli Engine block and internal
motorja components
SIST ISO 12046:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 12046:2013

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SIST ISO 12046:2013
INTERNATIONAL ISO
STANDARD 12046
Second edition
2012-03-01
Synchronous belt drives — Automotive
belts — Determination of physical
properties
Transmissions synchrones par courroies — Courroies pour la
construction automobile — Détermination des caractéristiques physiques
Reference number
ISO 12046:2012(E)
©
ISO 2012

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SIST ISO 12046:2013
ISO 12046:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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Published in Switzerland
ii © ISO 2012 – All rights reserved

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SIST ISO 12046:2013
ISO 12046:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Test methods . 1
5 General conditions for testing . 2
5.1 Standard environmental conditions . 2
5.2 Standard conditions of test specimens . 2
5.3 Rounding off the test results. 2
5.4 Test report . 3
6 Static property tests . 3
6.1 Test for hardness of rubber core . 3
6.2 Tensile strength test . 3
6.3 Fabric adhesion test . 4
6.4 Tension-cord adhesion test . 5
6.5 Tooth-shear test . 6
6.6 Test for resistance to high temperature . 8
6.7 Test for resistance to low temperature . 9
6.8 Test for resistance to oil . 9
6.9 Test for resistance to ozone . 9
6.10 Test for resistance to water . 9
Bibliography .10
© ISO 2012 – All rights reserved iii

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SIST ISO 12046:2013
ISO 12046:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12046 was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts),
Subcommittee SC 4, Synchronous belt drives.
This second edition cancels and replaces the first edition (ISO 12046:1995), which has been technically revised.
iv © ISO 2012 – All rights reserved

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SIST ISO 12046:2013
INTERNATIONAL STANDARD ISO 12046:2012(E)
Synchronous belt drives — Automotive belts — Determination
of physical properties
1 Scope
This International Standard specifies test methods for determining the physical properties of synchronous belts
used in driving engine parts, such as camshafts, fuel injection pumps, balancing shafts. These test methods
are intended to provide a means of characterizing synchronous belt properties for belts which are evaluated
and qualified by dynamic laboratory and field testing.
NOTE The dimensional characteristics of these belts are the subject of ISO 9010.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD
and 100 IRHD)
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 7619-1, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Durometer
method (Shore hardness)
ISO 7619-2, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 2: IRHD
pocket meter method
3 Principle
Evaluation of the physical properties of automotive synchronous belts through standardized test methods.
These test methods are independent of tooth profiles.
4 Test methods
The tests are listed in Table 1.
© ISO 2012 – All rights reserved 1

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SIST ISO 12046:2013
ISO 12046:2012(E)
Table 1 — Tests
Test Subclause No.
Hardness of rubber core 6.1
Tensile strength 6.2
Fabric adhesion 6.3
Tension-cord adhesion 6.4
Tooth shear 6.5
Resistance to high temperature 6.6
Resistance to low temperature 6.7
Resistance to oil 6.8
Resistance to ozone 6.9
Resistance to water 6.10
5 General conditions for testing
5.1 Standard environmental conditions
Standard conditions in the laboratory shall be maintained at a temperature of (25 ± 5) °C, a relative humidity
of (65 ± 20) % and an atmospheric pressure of 86 kPa to 106 kPa . The test conditions should be recorded.
5.2 Standard conditions of test specimens
The test specimens shall be tested at least 24 h after vulcanization and shall be kept for at least 1 h prior to test
in a room maintained under standard conditions.
5.3 Rounding off the test results
The results of each test shall be rounded off and shall be recorded according to the number of figures
specified in Table 2.
Table 2 — Rounding off of results
Test Unit Measured test value Test results to be obtained
Hardness of rubber core Shore A or IRHD Integer Integer
Tensile strength N Nearest 10 Nearest 100
Fabric adhesion N Integer Integer
Tension-cord adhesi
...