EN ISO 28927-2:2009/A1:2017

SLOVENSKI STANDARD
01-oktober-2017
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Hand-held portable power tools - Test methods for evaluation of vibration emission - Part
2: Wrenches, nutrunners and screwdrivers - Amendment 1: Changes in annex C - Brake
device (ISO 28927-2:2009/Amd 1:2017)
Handgehaltene motorbetriebene Maschinen - Messverfahren zur Ermittlung der
Schwingungsemission - Teil 2: Schrauber, Mutterndreher und Schraubendreher -
Änderung 1 (ISO 28927-2:2009/Amd 1:2017)
Machines à moteur portatives - Méthodes d'essai pour l'évaluation de l'émission de
vibrations - Partie 2: Clés, boulonneuses et visseuses - Amendement 1: Modification de
l'Annexe C - dispositifs de freinage (ISO 28927-2:2009/Amd 1:2017)
Ta slovenski standard je istoveten z: EN ISO 28927-2:2009/A1:2017
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
25.140.20 (OHNWULþQDRURGMD Electric tools
25.140.30 2URGMD]DURþQRXSRUDER Hand-operated tools
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 28927-2:2009/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2017
EUROPÄISCHE NORM
ICS 25.140.10; 13.160
English Version
Hand-held portable power tools - Test methods for
evaluation of vibration emission - Part 2: Wrenches,
nutrunners and screwdrivers - Amendment 1: Changes in
annex C - Brake device (ISO 28927-2:2009/Amd 1:2017)
Machines à moteur portatives - Méthodes d'essai pour Handgehaltene motorbetriebene Maschinen -
l'évaluation de l'émission de vibrations - Partie 2: Clés, Messverfahren zur Ermittlung der
boulonneuses et visseuses - Amendement 1: Schwingungsemission - Teil 2: Schrauber,
Modification de l'Annexe C - dispositifs de freinage (ISO Mutterndreher und Schraubendreher - Änderung 1
28927-2:2009/Amd 1:2017) (ISO 28927-2:2009/Amd 1:2017)
This amendment A1 modifies the European Standard EN ISO 28927-2:2009; it was approved by CEN on 7 August 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28927-2:2009/A1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 28927-2:2009/A1:2017) has been prepared by Technical Committee ISO/TC
118 "Compressors and pneumatic tools, machines and equipment" in collaboration with Technical
Committee CEN/TC 231 “Mechanical vibration and shock” the secretariat of which is held by DIN.
This Amendment to the European Standard EN ISO 28927-2:2009 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by February 2018,
and conflicting national standards shall be withdrawn at the latest by February 2018.
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 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(s).
For the relationship with EU Directive(s) see informative Annex ZA and ZB, included in EN ISO
28927:2:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 28927-2:2009/Amd 1:2017 has been approved by CEN as EN ISO 28927-
2:2009/A1:2017 without any modification.
INTERNATIONAL ISO
STANDARD 28927-2
First edition
2009-12-15
AMENDMENT 1
2017-07
Hand-held portable power tools —
Test methods for evaluation of
vibration emission —
Part 2:
Wrenches, nutrunners and
screwdrivers
AMENDMENT 1: Changes in Annex C —
Brake devices
Machines à moteur portatives — Méthodes d’essai pour l’évaluation
de l’émission de vibrations —
Partie 2: Clés, boulonneuses et visseuses
AMENDEMENT 1: Modification de l’Annexe C — Dispositifs de
freinage
Reference number
ISO 28927-2:2009/Amd.1:2017(E)
©
ISO 2017
ISO 28927-2:2009/Amd.1:2017(E)

© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

ISO 28927-2:2009/Amd.1:2017(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 118, Compressors and pneumatic tools,
machines and equipment, Subcommittee SC 3, Pneumatic tools and machines.
ISO 28927-2:2009/Amd.1:2017(E)
Hand-held portable power tools — Test methods for
evaluation of vibration emission —
Part 2:
Wrenches, nutrunners and screwdrivers
AMENDMENT 1: Changes in Annex C — Brake devices
Page 26, Annex C
Replace the existing Annex C with the following:
Annex C
(normative)
Brake devices — Assembly specification and example drawings of parts
This annex gives requirements for the brake and also examples of brake designs.
C.1  Specification of brake device
The requirements on the brake system are:
— The size of the sockets should be according to Figures C.1 to C.5. The reason is to define the weight
of the sockets.
— The static friction coefficient of the brake shall not exceed the dynamic friction coefficient with
more than 20%.
— The brake force should not vary more than 20 % over a test run. This is obtained if the brake design
uses conical disc springs. If other design is used, the variation in brake force needs to be verified by
measurement.
— The mounted test rig shall not have any resonances within the frequency range for hand–arm
vibration that could influence the test results. This can be assured by bolting the base frame to a
concrete block having a mass of at least 400 kg.
ISO 28927-2:2009/Amd.1:2017(E)

C.2  Drawings, sockets
Dimensions
Name of part Material
mm
Socket 1009 General engineer-
ing steel
Carbonitrided 0,15
No. s (across flat) B t
1009-1 8 14 1
1009-02 13 22,2 2
1009-03 16 31,8 2
Dimensions of the hex head is according to ISO 4014.
Figure C.1 — Socket, 1009
2 © ISO 2017 – All rights reserved

ISO 28927-2:2009/Amd.1:2017(E)

Dimensions
Name of part Material
mm
Socket 1010 General engi-
neering steel
No. Square drive B D
1010-04 12,5;1/2 50,8 43
1010-05 16;5/8 50,8 43
A may be made shorter if a suitable stud is added between the socket and the lower
cover plate. Other combinations of square drive size and socket outer diameter
may be used as long as the rotational speed can be kept within given limits.
For guided sockets, use the specification in ISO/TS 21108:2011.
Figure C.2 — Socket, 1010
ISO 28927-2:2009/Amd.1:2017(E)

Dimensions
Name of part Material
mm
Socket 1011 General engi-
neering steel
No. Square drive A B D
1011-01 20;3/4 101,6 69,9 42
1011-02 25;1 114,3 101,6 71
A may be made shorter if a suitable stud is added between the socket and the lower
cover plate. Other combinations of square drive size and socket outer diameter
may be used as long as the rotational speed can be kept within given limits.
For guided sockets, use the specification in ISO/TS 21108:2011.
Figure C.3 — Socket, 1011
4 © ISO 2017 – All rights reserved

ISO 28927-2:2009/Amd.1:2017(E)

Dimensions
Name of part Material
mm
Socket 1012 General engi-
neering steel
Square drive 1½ 38 mm
For guided sockets, use the specification in ISO/TS 21108:2011.
Figure C.4 — Socket, 1012
ISO 28927-2:2009/Amd.1:2017(E)

Dimensions
Name of part Material
mm
Socket 1013 General engi-
neering steel
a
No. L L D
1013-01 25 50 10
1/4
1013-02 25 50 8
a
Standards hex drive 1/4 inch or other drive suitable for the
machine to be tested.
L may be made shorter if a suitable stud is added between the socket and the
lower cover plate.
Figure C.5 — Socket, 1013
Page 39, Annex D
The following new Annex D has been added:
Annex D
(informative)
Drawings, example of brake blocks
Example of brake block design:
— a steel base for mounting the brake and supporting the inner brake block;
— a pair of brake blocks for example aluminium blocks with a lining on the cylindrical surface (see
Tables D.1 and D.2 footnotes);
— a steel plate which supports the outer brake block;
— two cover plates made of steel;
— a socket that is rotated by the machine;
— bolts, nuts and spring washers used to apply the contact pressure between the socket and the
brake block;
— mounting screws for stopping the axial movements of the socket.
The conical disc spring shall be mounted in suitable directions to give an appropriate contact pressure,
i.e. such that they are half-compressed when the specified rotational frequency is reached.
Intense use of the brake device may necessitate the introduction of air cooling by the addition of a small
hole in the lower cover plate.
6 © ISO 2017 – All rights reserved

ISO 28927-2:2009/Amd.1:2017(E)

Figure D.1 — Brake device, large — For machines with shaft
...