EN ISO 28927-2:2009/A1:2017

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 (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)

Ročna prenosna električna orodja - Preskusne metode za vrednotenje oddajanja vibracij - 2. del: Vijači, izvijači in privijala - Dopolnilo A1: Spremembe v dodatku C - Zavorne naprave (ISO 28927-2:2009/Amd 1:2017)

General Information

• Status: Published
• Publication Date: 08-Aug-2017
• Withdrawal Date: 27-Feb-2018
• ICS: 13.160 - Vibration and shock with respect to human beings
• ICS: 25.140.10 - Pneumatic tools
• Technical Committee: CEN/TC 231 - Mechanical vibration and shock
• Drafting Committee: CEN/TC 231/WG 2 - Hand-arm vibration
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 09-Aug-2017
• Completion Date: 09-Aug-2017
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: SIST EN ISO 28927-2:2010/A1:2017 - 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)

Relations

• Amends: EN ISO 28927-2:2009 - Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 2: Wrenches, nutrunners and screwdrivers (ISO 28927-2:2009)
• Effective Date: 19-Nov-2011

Overview

EN ISO 28927-2:2009/A1:2017 is a CEN-endorsed amendment to ISO 28927-2 (Part 2 of the ISO 28927 series) that updates test methods for evaluating vibration emission from hand-held portable power tools - specifically wrenches, nutrunners and screwdrivers. Amendment A1 replaces Annex C (brake device specification) and adds Annex D (example brake-block drawings and parts tables). The changes clarify the brake-device design, assembly and test-rig requirements used when measuring tool vibration (hand–arm vibration).

Key topics and technical requirements

• Brake device specification (Annex C)

  • Socket sizes and weights are defined (see Figures C.1–C.5) to ensure repeatable loading.
  • The difference between static and dynamic friction coefficients of the brake must be ≤ 20%.
  • Brake force variation during a test run must not exceed ±20%; use of conical disc springs is recommended to meet this requirement (other designs may be used if verified by measurement).
  • The mounted test rig must not exhibit resonances in the hand–arm vibration frequency range; recommended practice is bolting the base frame to a concrete block ≥ 400 kg.

• Brake-block design and parts (Annex D)

  • Includes example drawings, bill-of-materials and sizing for large and small brake devices, brake blocks, cover plates, sockets, springs, bolts and washers.
  • Brake blocks may be phenolic laminate or aluminium with a friction lining; lining material must be tested so static/dynamic friction difference is <20%.
  • Guidance on mounting conical disc springs (half-compressed at the specified rotational frequency) and optional air-cooling provisions for intense use.

• References and compatibility

  • For guided sockets the amendment points to ISO/TS 21108:2011 for socket specification.
  • The amendment is intended to be implemented without modification by CEN members.

Applications

• Establishing repeatable, comparable laboratory test setups for measuring vibration emissions of bolting tools and screwdrivers.
• Designing or procuring brake devices and fixtures for independent test laboratories, OEM test rigs and certification bodies.
• Supporting compliance testing for occupational health assessment (hand–arm vibration exposure) and product development to reduce tool vibration.

Who should use this standard

• Test laboratories and certification bodies measuring tool vibration.
• Tool manufacturers and R&D teams designing or validating nutrunners, wrenches and screwdrivers.
• Safety and occupational-health engineers responsible for hand–arm vibration risk assessment.
• Standards bodies and technical committees implementing test protocols.

Related standards

• ISO 28927 series (test methods for portable power tools)
• ISO/TS 21108:2011 (guided socket specifications)

Keywords: hand-held portable power tools, vibration emission, test methods, EN ISO 28927-2:2009/A1:2017, wrench vibration testing, brake device, conical disc spring, socket sizes, hand–arm vibration.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2017
5RþQDSUHQRVQDHOHNWULþQDRURGMD3UHVNXVQHPHWRGH]DYUHGQRWHQMHRGGDMDQMD
YLEUDFLMGHO9LMDþLL]YLMDþLLQSULYLMDOD'RSROQLOR$6SUHPHPEHYGRGDWNX&
=DYRUQHQDSUDYH,62$PG
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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
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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
...