SIST EN ISO 28927-12:2013

Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 12: Die grinders (ISO 28927-12:2012)

This part of ISO 28927 specifies a laboratory method for measuring hand-transmitted vibration emission at the handles of hand-held power driven portable die grinders. It is a type-test procedure for establishing the magnitude of vibration in the gripping areas of the machines where operating under type test conditions. It is intended that the results be used to compare different models of the same type of machine. This part of ISO 28927 is applicable to hand-held machines (see Clause 5), driven pneumatically or by other means, equipped with a collet and intended for deburring operations using hard metal burrs or mounted points, on different materials ranging from hard steel to plastics. It is also applicable to low-speed die grinders using flap wheels or cylindrical sleeves.

Handgehaltene motorbetriebene Maschinen - Messverfahren zur Ermittlung der Schwingungsemission - Teil 12: Geradschleifer mit Spannzange (ISO 28927-12:2012)

Dieser Teil von ISO 28927 legt ein Laborverfahren zur Messung der Hand-Arm-Schwingungen fest, die an
den Handgriffen von handgehaltenen motorbetriebenen Geradschleifern mit Spannzange (Schleifmaschinen
für Schleifstifte, Stabschleifer) hervorgerufen werden. Es handelt sich um ein Messverfahren zur Ermittlung
der Schwingungskennwerte (Schwingungsemissionswerte) an den Greifstellen der Maschine, die unter Typprüfbedingungen
betrieben wird. Der Zweck besteht darin, dass die Kennwerte zum Vergleich verschiedener
Modelle derselben Maschinenart verwendet werden können.
Dieser Teil von ISO 28927 gilt für handgehaltene Maschinen mit Spannzange (siehe Abschnitt 5), die
pneumatisch oder auf andere Weise angetrieben werden und mit einem Frässtift aus Hartmetall oder einem
Schleifstift zum Entgraten unterschiedlichen Materials dienen – von hartem Stahl bis Kunststoff. Er gilt auch
für langsamlaufende Geradschleifer mit Spannzange für Lamellenschleifstifte oder zylindrische Schleifhülsen.
Er gilt jedoch nicht für Geradschleifer ohne Spannzange (Radialschleifmaschinen) mit Schleifscheiben der
Form 1 (gerade Schleifscheibe), der Form 4 (zweiseitig konische Schleifscheibe) oder verschiedenster Arten
zylindrischer Schleifkörper. Für diese Maschinen gilt ISO 28927-4.
ANMERKUNG Um eine Verwechslung zu vermeiden, wird in dieser Norm zwischen der (motorbetriebenen) Maschine
und dem Werkzeug oder Einsatzwerkzeug strikt unterschieden.

Machines à moteur portatives - Méthodes d'essai pour l'évaluation de l'émission de vibrations - Partie 12: Meuleuses d'outillage (ISO 28927-12:2012)

L'ISO 28927-12:2012 spécifie une méthode de mesure en laboratoire des émissions de vibrations transmises aux mains, s'exerçant au niveau des poignées des meuleuses d'outillage à moteur portatives. Il s'agit d'une méthode d'essai de type définissant l'amplitude des vibrations aux zones de préhension des machines fonctionnant dans les conditions d'essai de type. Il est prévu d'utiliser les résultats pour comparer différents modèles du même type de machine.
L'ISO 28927-12:2012 s'applique aux machines portatives, pneumatiques ou entraînées par un autre dispositif, équipées d'une pince de serrage et destinées aux opérations d'ébavurage avec des fraises-limes en métaux durs ou des meules sur tige, sur différents types de matériaux allant de l'acier dur aux plastiques. Elle s'applique également aux meuleuses d'outillage à vitesse lente munies de roues à lamelles abrasives ou de manchons cylindriques.

Ročna prenosna električna orodja - Preskusne metode za vrednotenje oddajanja vibracij - 12. del: Brusilniki (ISO 28927-12:2012)

Ta del standarda ISO 28927 določa laboratorijsko metodo za merjenje oddajanja ročno posredovanih vibracij na ročajih ročnih prenosnih električnih brusilnikov. To je postopek tipskega preskusa za ugotavljanje stopnje vibriranja na območjih prijema strojev med delovanjem pod pogoji tipskega preskusa. Namenjen je primerjavi rezultatov različnih modelov iste vrste naprave. Ta del standarda ISO 28927 velja za ročne stroje (glej točko 5), ki se upravljajo pnevmatično ali z drugimi sredstvi, so opremljeni z okvirjem in namenjeni vrtanju z uporabo trdih kovinskih svedrov ali nameščenih točk na različnih materialih, od trdega jekla do plastike. Velja tudi za brusilnike z zaklopnimi kolesi ali cilindričnimi cevmi.

General Information

• Status: Published
• Public Enquiry End Date: 24-Oct-2010
• Publication Date: 16-Apr-2013
• ICS: 13.160 - Vibration and shock with respect to human beings
• ICS: 25.080.50 - Grinding and polishing machines
• ICS: 25.140.20 - Electric tools
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Apr-2013
• Due Date: 20-Jun-2013
• Completion Date: 17-Apr-2013
• 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)
• Directive: 89/392/EEC - Machinery - Safety of machinery: general essential health and safety requirements
• Directive: 98/37/EC - Machinery
• Mandate: M/079 - Mandate to CEN and CENELEC for standardization in the field of machines
• Ref Project: EN ISO 28927-12:2012 - Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 12: Die grinders (ISO 28927-12:2012)

Relations

• Revised: SIST EN ISO 8662-13:2000 - Hand-held portable power tools - Measurement of vibrations at the handle - Part 13: Die grinders (ISO 8662-13:1997)
• Effective Date: 15-May-2010
• Replaces: SIST EN ISO 8662-13:2000 - Hand-held portable power tools - Measurement of vibrations at the handle - Part 13: Die grinders (ISO 8662-13:1997)
• Effective Date: 01-Jun-2013
• Replaces: SIST EN ISO 8662-13:2000/AC:2000 - Hand-held portable power tools - Measurement of vibrations at the handle - Part 13: Die grinders (ISO 8662-13:1997)
• Effective Date: 01-Jun-2013

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 28927-12:2013
01-junij-2013
1DGRPHãþD
SIST EN ISO 8662-13:2000
SIST EN ISO 8662-13:2000/AC:2000
5RþQDSUHQRVQDHOHNWULþQDRURGMD3UHVNXVQHPHWRGH]DYUHGQRWHQMHRGGDMDQMD
YLEUDFLMGHO%UXVLOQLNL,62
Hand-held portable power tools - Test methods for evaluation of vibration emission - Part
12: Die grinders (ISO 28927-12:2012)
Handgehaltene motorbetriebene Maschinen - Messverfahren zur Ermittlung der
Schwingungsemission - Teil 12: Geradschleifer mit Spannzange (ISO 28927-12:2012)
Machines à moteur portatives - Méthodes d'essai pour l'évaluation de l'émission de
vibrations - Partie 12: Meuleuses d'outillage (ISO 28927-12:2012)
Ta slovenski standard je istoveten z: EN ISO 28927-12:2012
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
25.080.50 Brusilni in polirni stroji Grinding and polishing
machines
25.140.20 (OHNWULþQDRURGMD Electric tools
SIST EN ISO 28927-12:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 28927-12:2013

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SIST EN ISO 28927-12:2013


EUROPEAN STANDARD
EN ISO 28927-12

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2012
ICS 25.140.10; 13.160 Supersedes EN ISO 8662-13:1997
English Version
Hand-held portable power tools - Test methods for evaluation of
vibration emission - Part 12: Die grinders (ISO 28927-12:2012)
Machines à moteur portatives - Méthodes d'essai pour Handgehaltene motorbetriebene Maschinen -
l'évaluation de l'émission de vibrations - Partie 12: Messverfahren zur Ermittlung der Schwingungsemission -
Meuleuses d'outillage (ISO 28927-12:2012) Teil 12: Geradschleifer mit Spannzange (ISO 28927-
12:2012)
This European Standard was approved by CEN on 12 October 2012.

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

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28927-12:2012: E
worldwide for CEN national Members.

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SIST EN ISO 28927-12:2013
EN ISO 28927-12:2012 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4

2

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SIST EN ISO 28927-12:2013
EN ISO 28927-12:2012 (E)
Foreword
This document (EN ISO 28927-12:2012) 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 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 April 2013, and conflicting national standards shall be withdrawn at the
latest by April 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8662-13:1997.
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.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
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.
Endorsement notice
The text of ISO 28927-12:2012 has been approved by CEN as a EN ISO 28927-12:2012 without any
modification.
3

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SIST EN ISO 28927-12:2013
EN ISO 28927-12:2012 (E)
Annex ZA
(informative)

Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with
the clauses of this standard confers, within the limits of the scope of this standard, a presumption of
conformity with the corresponding Essential Requirements of that Directive excerpt ER 2.2.1.1 and associated
EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

4

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SIST EN ISO 28927-12:2013
INTERNATIONAL ISO
STANDARD 28927-12
First edition
2012-10-15
Hand-held portable power tools — Test
methods for evaluation of vibration
emission —
Part 12:
Die grinders
Machines à moteur portatives — Méthodes d’essai pour l’évaluation de
l’émission de vibrations —
Partie 12: Meuleuses d’outillage
Reference number
ISO 28927-12:2012(E)
©
ISO 2012

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(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,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
3.1 General . 2
3.2 Terms and definitions . 2
3.3 Symbols . 2
4 Basic standards and vibration test codes . 3
5 Description of the family of machines . 3
6 Characterization of vibration . 4
6.1 Direction of measurement . 4
6.2 Location of measurements . 5
6.3 Magnitude of vibration . 7
6.4 Combination of vibration directions . 7
7 Instrumentation requirements . 7
7.1 General . 7
7.2 Mounting of transducers . 7
7.3 Frequency weighting filter . 8
7.4 Integration time . 8
7.5 Auxiliary equipment . 8
7.6 Calibration . 8
8 Testing and operating conditions of the machinery . 8
8.1 General . 8
8.2 Operating conditions . 9
8.3 Other quantities to be specified . 9
8.4 Attached equipment, workpiece and task . 9
8.5 Operator .13
9 Measurement procedure and validity .13
9.1 Reported vibration values .13
9.2 Declaration and verification of the vibration emission value .14
10 Measurement report .14
Annex A (informative) Model test report for vibration emission of die grinders .16
Annex B (normative) Determination of uncertainty .18
Bibliography .20
© ISO 2012 – All rights reserved iii

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(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 28927-12 was prepared by Technical Committee ISO/TC 188, Compressors and pneumatic tools, machines
and equipment, Subcommittee SC 3, Pneumatic tools and machines.
This first edition of ISO 28927-12 cancels and replaces ISO 8662-13:1997, which has been technically revised. It
also incorporates the Technical Corrigendum ISO 8662-13:1997/Corr.1:1998. The most important changes are
— vibration measurement in three axes and, where applicable, at both hand positions,
— new test method; a real grinding process is introduced, and
— new transducer positions, with an improved definition of the transducer positions and orientation.
ISO 29827 consists of the following parts, under the general title Hand-held portable power tools — Test
methods for evaluation of vibration emission:
1)
— Part 1: Angle and vertical grinders
2)
— Part 2: Wrenches, nutrunners and screwdrivers
3)
— Part 3: Polishers and rotary, orbital and random orbital sanders
4)
— Part 4: Straight grinders
5)
— Part 5: Drills and impact drills
6)
— Part 6: Rammers
1) Together with ISO 28927-4, replaces ISO 8662-4, Hand-held portable power tools — Measurement of vibrations at the
handle — Part 4: Grinders.
2) Replaces ISO 8662-7, Hand-held portable power tools — Measurement of vibrations at the handle — Part 7: Wrenches,
screwdrivers and nut runners with impact, impulse or ratchet action. All screwdrivers and nutrunners except for one-shot
tools now covered.
3) Replaces ISO 8662-8, Hand-held portable power tools — Measurement of vibrations at the handle — Part 8: Polishers
and rotary, orbital and random orbital sanders.
4) Together with Part 1, replaces ISO 8662-4, Hand-held portable power tools — Measurement of vibrations at the
handle — Part 4: Grinders.
5) Replaces ISO 8662-6, Hand-held portable power tools — Measurement of vibrations at the handle — Part 6: Impact
drills. Non-impacting drills now covered.
6) Replaces ISO 8662-9, Hand-held portable power tools — Measurement of vibrations at the handle — Part 9: Rammers.
iv © ISO 2012 – All rights reserved

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
7)
— Part 7: Nibblers and shears
— Part 8: Saws, polishing and filing machines with reciprocating action and small saws with oscillating or
8)
rotating action
9)
— Part 9: Scaling hammers and needle scalers
10)
— Part 10: Percussive drills, hammers and breakers
11)
— Part 11: Stone hammers
12)
— Part 12: Die grinders
7) Replaces ISO 8662-10, Hand-held portable power tools — Measurement of vibrations at the handle — Part 10: Nibblers
and shears.
8) Replaces ISO 8662-12, Hand-held portable power tools — Measurement of vibrations at the handle — Part 12: Saws
and files with reciprocating action and saws with oscillating or rotating action.
9) Together with Part 11, replaces ISO 8662-14, Hand-held portable power tools — Measurement of vibrations at the
handle — Part 14: Stone-working tools and needle scalers.
10) Replaces ISO 8662-2 and its amendments, Hand-held portable power tools — Measurement of vibrations at the
handle — Part 2: Chipping hammers and riveting hammers, ISO 8662-3 and its amendments, Hand-held portable power
tools — Measurement of vibrations at the handle — Part 3: Rock drills and rotary hammers, and ISO 8662-5 and its
amendments, Hand-held portable power tools — Measurement of vibrations at the handle — Part 5: Pavement breakers
and hammers for construction work. Chipping and riveting hammers, rock drills and rotary hammers all covered.
11) Together with Part 9, replaces ISO 8662-14, Hand-held portable power tools — Measurement of vibrations at the
handle — Part 14: Stone-working tools and needle scalers.
12) Replaces ISO 8662-13 Hand-held portable power tools — Measurement of vibrations at the handle — Part 13: Die
Grinders.
© ISO 2012 – All rights reserved v

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
Introduction
This document is a type-C standard as stated in ISO 12100.
When requirements of this type-C standard are different from those which are stated in type-A or -B standards,
the requirements of this type-C standard take precedence over the requirements of the other standards for
machines that have been designed and built according to the requirements of this type-C standard.
The vibration test codes for portable hand-held machines given in ISO 28927 (all parts) are based on ISO 20643,
which gives general specifications for the measurement of the vibration emission of hand-held and hand-
guided machinery. ISO 28927 (all parts) specifies the operation of the machines under type-test conditions
and other requirements for the performance of type tests. The structure/numbering of its clauses follows that
of ISO 20643.
The basic principle for transducer positioning first introduced in the IEC 60745 series of European standards
is followed, representing a deviation from ISO 20643 for reasons of consistency. The transducers are primarily
positioned next to the hand in the area between the thumb and the index finger, where they give the least
disturbance to the operator gripping the machine.
It has been found that vibrations generated by die grinders vary considerably in typical use. This is largely
due to variations in the unbalance of the inserted tool and from the contact between the inserted tool and the
surface of the workpiece. The vibration value is also to a large extent dependent on the skill of the operator.
This part of ISO 28927 uses a real working process for the test.
In order to provide a method that gives good measurement reproducibility, the procedure is described in detail
and it is essential that the procedure be followed. The procedure is chosen to give vibration values which are, as
far as possible, in accordance with ISO 20643.The values obtained according to this part of ISO 28927 are type-
test values. The procedures of ISO 5349 are required whenever exposure at the workplace is to be assessed.
The values obtained are type-test values intended to be representative of the average of the upper quartile
of typical vibration magnitudes in real-world use of the machines. However, the actual magnitudes vary
considerably from time to time and depend on many factors, including the operator, the task and the inserted
tool or consumable. The state of maintenance of the machine itself might also be of importance. Under real
working conditions, the influences of the operator and process can be particularly important at low magnitudes
2
It is therefore not recommended that emission values below 2,5 m/s be used for estimating the vibration
2
magnitude under real working conditions. In such cases, 2,5 m/s is the recommended vibration magnitude for
estimating the machine vibration.
If accurate values for a specific work place are required, then measurements (according to ISO 5349) in that
work situation can be necessary. Vibration values measured in real working conditions can be either higher or
lower than the values obtained using this part of ISO 28927.
Higher vibration magnitudes can easily occur in real work situations, caused by the use of excessively
unbalanced inserted tools, bent shafts of burrs or worn-out collets.
The vibration test codes given in ISO 28927 (all parts) supersede those given in ISO 8662 (all parts), which has
been replaced by the corresponding parts of ISO 28927 (see Foreword).
NOTE ISO 8662-11, Hand-held portable power tools — Measurement of vibrations at the handle — Part 11: Fastener
driving tools, can be replaced by a future part of ISO 28927.
vi © ISO 2012 – All rights reserved

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SIST EN ISO 28927-12:2013
INTERNATIONAL STANDARD ISO 28927-12:2012(E)
Hand-held portable power tools — Test methods for evaluation
of vibration emission —
Part 12:
Die grinders
1 Scope
This part of ISO 28927 specifies a laboratory method for measuring hand-transmitted vibration emission at
the handles of hand-held power driven portable die grinders. It is a type-test procedure for establishing the
magnitude of vibration in the gripping areas of the machines where operating under type test conditions. It is
intended that the results be used to compare different models of the same type of machine.
This part of ISO 28927 is applicable to hand-held machines (see Clause 5), driven pneumatically or by other
means, equipped with a collet and intended for deburring operations using hard metal burrs or mounted points,
on different materials ranging from hard steel to plastics. It is also applicable to low-speed die grinders using
flap wheels or cylindrical sleeves.
NOTE 1 It is not applicable to straight grinders equipped with type 1 straight wheels, type 4 tapered wheels or different
types of cylindrical plugs. For those machines, ISO 28927-4 is applicable.
NOTE 2 It is not applicable to die grinders used with wire brushes.
NOTE 3 To avoid confusion with the terms “power tool” and “inserted tool”, “machine” is used hereinafter for “power tool”.
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 630 (all parts), Structural steels
ISO 2421, Coated abrasives — Cylindrical sleeves
ISO 2787, Rotary and percussive pneumatic tools — Performance tests
ISO 5349 (all parts), Mechanical vibration — Measurement and evaluation of human exposure to hand
transmitted vibration
ISO 5391, Pneumatic tools and machines — Vocabulary
ISO 15637-1, Holding fixtures of cylindrical abrasive sleeves — Part 1: Holding fixtures with shank for hand-
held grinding machines
ISO 17066, Hydraulic tools — Vocabulary
ISO 20643:2005, Mechanical vibration — Hand-held and hand-guided machinery — Principles for evaluation
of vibration emission.
EN 12096, Mechanical vibration — Declaration and verification of vibration emission values
DIN 8033-1, Hardmetal burrs — Technical requirements
DIN 8033-2, Hardmetal burrs — Cylindrical burrs
© ISO 2012 – All rights reserved 1

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
3 Terms, definitions and symbols
3.1 General
For the purposes of this document, the terms and definitions given in ISO 5391, ISO 17066 and ISO 20643,
and the following apply.
3.2 Terms and definitions
3.2.1
die grinder
machine for deburring and light cleaning operations, the output spindle normally being fitted with a collet,
making it suitable for use with mounted points and hardmetal burrs
NOTE 1 A die grinder with a burr may also be called a file.
NOTE 2 Adapted from ISO 5391:2003, definition 2.1.5.
3.2.2
straight die grinder
die grinder having the output spindle coaxial with the motor axis
[ISO 5391:2003, definition 2.1.5.1]
3.2.3
angle die grinder
die grinder where the output spindle is at an angle to the motor axis of the tool
[ISO 5391:2003, definition 2.1.5.2]
3.3 Symbols
For the purposes of this document, the following symbols apply.
Symbol Description Unit
2
a root-mean-square (r.m.s.) single-axis acceleration value of the frequency- m/s
hw
weighted hand-transmitted vibration
2
a vibration total value of frequency-weighted r.m.s. acceleration; is the root m/s
hv
sum of squares of the a values for the three measured axes of
hw
vibration
2
arithmetic mean value of a values of runs for one operator for one hand
m/s
a
hv
hv
position
2
a m/s
arithmetic mean value of a values for all operators for one hand
h
hv
position
2
arithmetic mean value of a values for one hand position on several m/s
a
h
h
machines
2
a declared vibration emission value m/s
hd
2
s standard deviation for a test series (for a sample, s) m/s
n−1
2
σ standard deviation of reproducibility (for a population, σ) m/s
R
C coefficient of variation for a test series
V
2
K
uncertainty m/s
2 © ISO 2012 – All rights reserved

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
4 Basic standards and vibration test codes
This part of ISO 28297 is based on the requirements of ISO 20643 and corresponds to its structure in respect
of clause subjects and numbering, except for the annexes.
Annex A presents a model test report and Annex B the means for determining the uncertainty, K.
5 Description of the family of machines
This part of ISO 28927 is applicable to hand-held machines, driven pneumatically or by other means, equipped
with a collet and intended for deburring operations using hard metal burrs or mounted points, on different
materials ranging from hard steel to plastics. It is also applicable to low-speed die grinders using flap wheels
or cylindrical sleeves.
Figures 1 to 4 show examples of typical grinders covered by this part of ISO 28927.
Figure 1 — Straight die grinder — Short version
Figure 2 — Straight die grinder — Long version
© ISO 2012 – All rights reserved 3

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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
Figure 3 — Angle die grinder
Figure 4 — Pencil die grinder
6 Characterization of vibration
6.1 Direction of measurement
The vibration transmitted to the hand shall be measured and reported for three directions of an orthogonal
coordinate system. At each hand position, the vibration shall be measured simultaneously in the three directions
shown in Figures 5 to 8.
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SIST EN ISO 28927-12:2013
ISO 28927-12:2012(E)
6.2 Location of measurements
Measurement shall be carried out at the gripping zones, where the operator normally holds the machine and
applies the feed force. For machines intended for one-hand operation, it is necessary to measure at only a
single point.
The prescribed transducer location shall be as close as possible to the hand between the thumb and index
finger. This shall apply to both hand positions, with the machine held as in normal operation. Whenever possible,
measurements shall be made at the prescribed locations.
A secondary location is defined as being on the side of, and as close as possible to, the inner end of the
handle where the prescribed location is found. If the prescribed location of the transducer cannot be used, this
secondary location shall be used instead.
The prescribed or secondary locations on the support handle shall also be used on anti-vibration handles.
Figures 5 to 8 show the prescribed and secondary locations and measurement directions for the hand positions
normally used for the different types of machines in this family.
Key
1 prescribed location
2 secondary location
Figure 5 — Measurements locations — Straight die grinder — Short version
© ISO 2012 – All rights res
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