Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 3-4: Particular requirements for transportable bench grinders

IEC 62841-3-4:2016 applies to transportable bench grinders that can be equipped with one or two accessories as follows: - type 1 grinding wheels in accordance with ISO 603-4:1999 with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - wire brushes with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - polishing wheels with a diameter not exceeding 310 mm and with a peripheral speed of any accessory between 10 m/s and 50 m/s. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 36 months from the date of publication Keywords: Bench Grinder, Hand-held tool, Transportable tool This publication is to be read in conjunction with IEC 62841-1:2014.

Elektrische motorbetriebene handgeführte Werkzeuge, transportable Werkzeuge und Rasen- und Gartenmaschinen - Sicherheit - Teil 3-4: Besondere Anforderungen für transportable Tischschleifmaschinen

Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 3-4: Exigences particulières pour les tourets à meuler transportables

IEC 62841-3-4:2016 applies to transportable bench grinders that can be equipped with one or two accessories as follows: - type 1 grinding wheels in accordance with ISO 603-4:1999 with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - wire brushes with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - polishing wheels with a diameter not exceeding 310 mm and with a peripheral speed of any accessory between 10 m/s and 50 m/s. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 36 months from the date of publication Keywords: Bench Grinder, Hand-held tool, Transportable tool This publication is to be read in conjunction with IEC 62841-1:2014.

Elektromotorna ročna orodja, prenosna orodja ter stroji za trato in vrt - Varnost - 3-4. del: Posebne zahteve za prenosne namizne brusilnike (IEC 62841-3-4:2016)

Ta točka 1. dela se uporablja, razen kot sledi:
Dodatek:
Ta del standarda IEC 62841 se uporablja za prenosne namizne brusilnike, ki jih je mogoče opremiti z enim ali dvema od naslednjih priključkov:
– brusni koluti tipa 1 v skladu s standardom ISO 603-4:1999 s premerom največ 310 mm in debelino največ 55 mm;
– žične krtače s premerom največ 310 mm in debelino največ 55 mm;
– polirni koluti s premerom največ 310 mm;
pri čemer mora biti vrednost periferne hitrosti katerega koli priključka od 10 m/s do 50 m/s.
OPOMBA: polirni koluti se imenujejo tudi koluti za brušenje.

General Information

Status
Published
Publication Date
23-Jun-2016
Current Stage
6060 - Document made available
Due Date
20-Sep-2016

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 62841-3-4:2016
01-september-2016
1DGRPHãþD
SIST EN 61029-2-4:2011

(OHNWURPRWRUQDURþQDRURGMDSUHQRVQDRURGMDWHUVWURML]DWUDWRLQYUW9DUQRVW

GHO3RVHEQH]DKWHYH]DSUHQRVQHQDPL]QHEUXVLOQLNH ,(&
Electric Motor-Operated Hand-Held Tools, Transportable Tools and Lawn and Garden

Machinery - Safety - Part 3-4: Particular requirements for transportable bench grinders

(IEC 62841-3-4:2016)
Ta slovenski standard je istoveten z: EN 62841-3-4:2016
ICS:
25.080.50 Brusilni in polirni stroji Grinding and polishing
machines
25.140.20 (OHNWULþQDRURGMD Electric tools
SIST EN 62841-3-4:2016 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62841-3-4:2016
---------------------- Page: 2 ----------------------
SIST EN 62841-3-4:2016
EUROPEAN STANDARD EN 62841-3-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2016
ICS 25.140.20 Supersedes EN 61029-2-4:2011
English Version
Electric motor-operated hand-held tools, transportable tools and
lawn and garden machinery - Safety - Part 3-4: Particular
requirements for transportable bench grinders
(IEC 62841-3-4:2016 , modified)

Outils électroportatifs à moteur, outils portables et machines Elektrische motorbetriebene handgeführte Werkzeuge,

pour jardins et pelouses - Sécurité - Partie 3-4: Exigences transportable Werkzeuge und Rasen- und

particulières pour les tourets à meuler transportables Gartenmaschinen - Sicherheit - Teil 3-4: Besondere

(IEC 62841-3-4:2016 , modifiée) Anforderungen für transportable Tischschleifmaschinen

(IEC 62841-3-4:2016 , modifiziert)

This European Standard was approved by CENELEC on 2016-03-21. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62841-3-4:2016 E
---------------------- Page: 3 ----------------------
SIST EN 62841-3-4:2016
EN 62841-3-4:2016
European foreword

The text of document 116/258/FDIS, future edition 1 of IEC 62841-3-4, prepared by IEC/TC 116 "Safety

of motor-operated electric tools" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN 62841-3-4:2016.

A draft amendment, which covers common modifications to IEC 62841-3-4:2016 (116/258/FDIS), was

prepared by CLC/TC 116 "Safety of motor-operated electric tools" and approved by CENELEC.

The following dates are fixed:
• latest date by which this document has to be implemented (dop) 2016-12-24
at national level by publication of an identical
national standard or by endorsement
(dow) 2020-06-24
• latest date by which the national standards conflicting
with this document have to be withdrawn
This document supersedes EN 61029-2-4:2011.
This European Standard is divided into four parts:

Part 1: General requirements which are common to most hand-held electric motor operated tools

(for the purpose of this standard referred to simply as tools) which could come within the

scope of this standard;

Part 2, 3 or 4: Requirements for particular types of tools which either supplement or modify the

requirements given in Part 1 to account for the particular hazards and characteristics of

these specific tools.
This Part 3-4 is to be used in conjunction with EN 62841-1:2015.

This Part 3-4 supplements or modifies the corresponding clauses in EN 62841-1:2015, so as to convert it

into the European Standard: Particular requirements for transportable bench grinders.

Where a particular subclause of Part 1 is not mentioned in this Part 3-4, that subclause applies as far as

relevant. When this standard states "addition", "modification" or "replacement", the relevant text in Part 1

is to be adapted accordingly.
The following print types are used:
- requirements; in roman type
- test specifications: in italic type;
- notes: in smaller roman type.
The terms defined in Clause 3 are printed in bold typeface.

Subclauses, notes, tables and figures which are additional to those in Part 1 are numbered starting

from 101.

Clauses, subclauses, notes, tables, figures and annexes which are additional to those in

IEC 62841-3-4:2016 are prefixed “Z”.
---------------------- Page: 4 ----------------------
SIST EN 62841-3-4:2016
EN 62841-3-4:2016
This European Standard follows the overall requirements of EN ISO 12100.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.

This document has been prepared under a mandate given to CENELEC 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 ZZ, which is an integral part of this

document.

Compliance with the clauses of Part 1 together with this Part 3-4 provides one means of conforming with

the essential health and safety requirements of the Directive concerned.
---------------------- Page: 5 ----------------------
SIST EN 62841-3-4:2016
EN 62841-3-4:2016
Endorsement notice

The text of the International Standard IEC 62841-3-4:2016 was approved by CENELEC as a European

Standard with agreed common modifications.
COMMON MODIFICATIONS
Replace the title of Annex I by the following:
Annex I
(normative)
Measurement of noise and vibration emissions
Add the following annexes:
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
This annex from EN 62841-1:2015 is applicable with the following addition:
Publication Year Title EN/HD Year
ISO 603-4 1999 - -
Bonded abrasive products - Dimensions -
Part 4: Grinding wheels for surface
grinding/peripheral grinding
---------------------- Page: 6 ----------------------
SIST EN 62841-3-4:2016
EN 62841-3-4:2016
Annex ZZ
(informative)
Relationship between this European Standard and the essential requirements of
Directive 2006/42/EC [2006 OJ L157] aimed to be covered

This European Standard has been prepared under a Commission’s standardization request M/396 to

provide one voluntary means of conforming to essential requirements of Directive 2006/42/EC of the

European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC

[2006 OJ L157].

Once this standard is cited in the Official Journal of the European Union under that Directive, compliance

with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of the scope of

this standard, a presumption of conformity with the corresponding essential requirements of that

Directive, and associated EFTA regulations.
Table ZZ.1 – Correspondence between this European Standard
and Annex I of Directive 2006/42/EC
Essential Requirements of Clause(s) / sub-clause(s)
Remarks / Notes
Directive 2006/42/EC of this EN
Annex I All clauses All corresponding requirements
are covered by complying with all
clauses.

WARNING 1: Presumption of conformity stays valid only as long as a reference to this European

Standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European Union.

WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of this

standard.
---------------------- Page: 7 ----------------------
SIST EN 62841-3-4:2016
EN 62841-3-4:2016
Bibliography
The Bibliography of EN 62841-1:2015 is applicable.
---------------------- Page: 8 ----------------------
SIST EN 62841-3-4:2016
IEC 62841-3-4
Edition 1.0 2016-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 3-4: Particular requirements for transportable bench grinders
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 3-4: Exigences particulières pour les tourets à meuler transportables
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20 ISBN 978-2-8322-3204-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 9 ----------------------
SIST EN 62841-3-4:2016
– 2 – IEC 62841-3-4:2016 © IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 4

1 Scope ............................................................................................................................ 6

2 Normative references..................................................................................................... 6

3 Terms and definitions .................................................................................................... 6

4 General requirements .................................................................................................... 7

5 General conditions for the tests ...................................................................................... 7

6 Radiation, toxicity and similar hazards ........................................................................... 7

7 Classification ................................................................................................................. 7

8 Marking and instructions ................................................................................................ 7

9 Protection against access to live parts ........................................................................... 9

10 Starting ......................................................................................................................... 9

11 Input and current ........................................................................................................... 9

12 Heating ......................................................................................................................... 9

13 Resistance to heat and fire ............................................................................................ 9

14 Moisture resistance ....................................................................................................... 9

15 Resistance to rusting ..................................................................................................... 9

16 Overload protection of transformers and associated circuits ............................................ 9

17 Endurance ................................................................................................................... 10

18 Abnormal operation ..................................................................................................... 10

19 Mechanical hazards ..................................................................................................... 10

20 Mechanical strength ..................................................................................................... 14

21 Construction ................................................................................................................ 16

22 Internal wiring .............................................................................................................. 17

23 Components ................................................................................................................ 17

24 Supply connection and external flexible cables and cords ............................................. 17

25 Terminals for external conductors ................................................................................ 17

26 Provision for earthing ................................................................................................... 17

27 Screws and connections .............................................................................................. 17

28 Creepage distances, clearances and distances through insulation ................................ 17

Annexes ............................................................................................................................. 22

Annex I (informative) Measurement of noise and vibration emissions .................................. 22

Bibliography ....................................................................................................................... 23

Figure 101 – Bench grinder ................................................................................................. 18

Figure 102 – Opening angles and dimensions for a guard .................................................... 19

Figure 103 – Transparent screen ......................................................................................... 20

Figure 104 – Bench grinder with inclinable work rest ........................................................... 20

Figure 105 – Flange dimensions .......................................................................................... 21

Table 4 – Required performance levels ............................................................................... 10

Table 101 – Minimum flange dimensions (see Figure 105) ................................................... 13

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SIST EN 62841-3-4:2016
IEC 62841-3-4:2016 © IEC 2016 – 3 –

Table 102 − Test torque for flanges ..................................................................................... 13

Table 103 − Guard thickness for steel ................................................................................. 15

Table 104 − Guard thickness for aluminium ......................................................................... 15

Table 105 – Minimum tool spindle diameter ......................................................................... 16

Table I.101 – Operating conditions for bench grinders ......................................................... 22

---------------------- Page: 11 ----------------------
SIST EN 62841-3-4:2016
– 4 – IEC 62841-3-4:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 3-4: Particular requirements for transportable bench grinders
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62841-3-4 has been prepared by IEC technical committee 116:

Safety of motor-operated electric tools.
The text of this standard is based on the following documents:
FDIS Report on voting
116/258/FDIS 116/275/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 12 ----------------------
SIST EN 62841-3-4:2016
IEC 62841-3-4:2016 © IEC 2016 – 5 –

This Part 3-4 is to be used in conjunction with the first edition of IEC 62841-1:2014.

This Part 3-4 supplements or modifies the corresponding clauses in IEC 62841-1, so as to

convert it into the IEC Standard: Particular requirements for transportable bench grinders.

Where a particular subclause of Part 1 is not mentioned in this Part 3-4, that subclause

applies as far as relevant. Where this standard states “addition”, “modification” or

“replacement”, the relevant text in Part 1 is to be adapted accordingly.
The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The terms defined in Clause 3 are printed in bold typeface.

Subclauses, notes and figures which are additional to those in Part 1 are numbered starting

from 101.

A list of all parts of the IEC 62841 series, under the general title: Electric motor-operated

hand-held tools, transportable tools and lawn and garden machinery – Safety, can be found

on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing

organizations may need a transitional period following publication of a new, amended or revised IEC publication in

which to make products in accordance with the new requirements and to equip themselves for conducting new or

revised tests.

It is the recommendation of the committee that the content of this publication be adopted for implementation

nationally not earlier than 36 months from the date of publication.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 13 ----------------------
SIST EN 62841-3-4:2016
– 6 – IEC 62841-3-4:2016 © IEC 2016
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 3-4: Particular requirements for transportable bench grinders
1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:

This part of IEC 62841 applies to transportable bench grinders that can be equipped with

one or two accessories as follows:

– type 1 grinding wheels in accordance with ISO 603-4:1999 with a diameter not exceeding

310 mm and a thickness not exceeding 55 mm;

– wire brushes with a diameter not exceeding 310 mm and a thickness not exceeding

55 mm;
– polishing wheels with a diameter not exceeding 310 mm;
and with a peripheral speed of any accessory between 10 m/s and 50 m/s.
NOTE Polishing wheels are also known as buffing wheels.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:

ISO 603-4:1999, Bonded abrasive products – Dimensions – Part 4: Grinding wheels for

surface grinding/peripheral grinding
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.101
bench grinder

tool designed to grind, clean, polish or debur metal or similar materials by means of one or

two rotating accessories fixed to one or two tool spindles, see Figure 101, where the

workpiece is held by hand and possibly assisted by a work rest
3.102
tool spindle

drive spindle of a bench grinder which supports the accessories and provides the rotation

3.103
work rest
surface or device intended to support or to guide the workpiece
---------------------- Page: 14 ----------------------
SIST EN 62841-3-4:2016
IEC 62841-3-4:2016 © IEC 2016 – 7 –
4 General requirements
This clause of Part 1 is applicable, except as follows:

4.101 D is understood to be the maximum diameter of the accessory to be used on each

tool spindle. Unless otherwise specified, tool spindle specific requirements dependent on D

shall be based on the value of D for the relevant tool spindle.

Throughout the remaining part of this document, unless otherwise explicitly stated, whenever

a requirement or a reference is made to “force” as multiple of D, the force shall be expressed

in newtons (N) and D shall be expressed in millimetres (mm).
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows:
5.17 Addition:

The mass of the tool shall include the guards, work rests and transparent screens. Any

additional parts such as leg sets or carrying means that are required in accordance with the

instructions for the safe use of the tool shall be included in the mass.
6 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
7 Classification
This clause of Part 1 is applicable.
8 Marking and instructions
This clause of Part 1 is applicable except as follows:
8.1 Addition:
Tools shall be marked with:
– rated no-load speed of the tool spindle(s).
8.2 Addition:
Tools shall be marked with the following safety warnings:
– “ WARNING Always wear eye protection” or the symbol M004 of ISO 7010 or the
following safety sign:

– a warning near any polishing spindle (i.e. a spindle without a guard) never to use a

grinding wheel or wire brush on the polishing side of the tool, if applicable.
---------------------- Page: 15 ----------------------
SIST EN 62841-3-4:2016
– 8 – IEC 62841-3-4:2016 © IEC 2016
8.3 Addition:

Bench grinders shall be marked with the minimum and maximum diameter of the accessory

to be used on each tool spindle.

Bench grinders shall be marked with the direction of rotation of the tool spindle, indicated in

a visible location on the tool in the vicinity of the tool spindle, by an arrow raised or recessed

or by any other means no less visible and indelible.
8.14.1 Addition:

The additional safety instructions as specified in 8.14.1.101 shall be given. This part may be

printed separately from the “General power tool safety warnings”.
8.14.1.101 Safety instructions for bench grinders
Bench grinder safety warnings

a) Do not use a damaged accessory. Before each use, inspect the accessory such as

abrasive wheels for chips and cracks and wire brushes for loose or cracked wires.

After inspecting and installing an accessory, position yourself and bystanders away

from the plane of the rotating accessory and run the power tool at maximum no-load

speed for one minute. Damaged accessories will normally break apart during this test

time.

NOTE 1 For tools that are not intended for wire brushes, the phrase “and wire brushes for loose or cracked

wires” is omitted.
b) The rated speed of the accessory must be at least equal to the maximum speed

marked on the power tool. Accessories running faster than their rated speed can break

and fly apart.
c) Be aware that wire bristles are thrown by the wire brush even during ordinary

operation. Do not overstress the wires by applying excessive load to the wire brush.

The wire bristles can easily penetrate light clothing and/or skin.

NOTE 2 The above safety warning applies only to tools intended to be used with wire brushes.

d) Never grind on the sides of a grinding wheel. Grinding on the side can cause the wheel

to break and fly apart.
8.14.2 a) Addition:

101) Information about details and type of the accessory(ies) recommended for each tool

spindle, e.g. the maximum thickness of the accessory and the diameter of the hole in

the accessory;

102) Instruction to use only accessories with a diameter according to the relevant marking

as required by 8.3;

103) Instruction to ensure that the bench grinder is always stable and secure (e.g. fixed to

a bench) and instruction how to fix the tool to a workbench or the like;

104) Instructions on the correct mounting of wheels and ensuring that wheels are free of

defects before use, including instructions for performing a ring test for cracks.

8.14.2 b) Addition:

101) Instruction to adjust the spark arrestor and the work rest frequently so as to

compensate for wear of the wheel;

102) Instruction to keep the distance between the spark arrestor/work rest and the wheel

as small as possible and in any case not greater than 2 mm;

103) Instruction to replace the worn wheel when these gaps are no longer able to be

maintained;
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SIST EN 62841-3-4:2016
IEC 62841-3-4:2016 © IEC 2016 – 9 –

104) For tools with two spindles: instruction to always use the tool with accessories on both

spindles in order to limit the risk of contact with the rotating spindle;

105) Instruction to always use the guard, work rest, transparent screen and spark arrestor

as required for the accessory(ies);

106) For tools with a vertically adjustable or inclinable work rest: instruction on how to

properly adjust and secure the work rest angle in relation to the wheel;
107) Instructions on how to perform grinding functions saf
...

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