IEC 62841-2-3:2020

Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and disc-type sanders

IEC 62841-2-3:2020: applies to hand-held grinders, disc-type polishers and disc-type sanders, including angle, straight and vertical tools, intended for use on various materials except magnesium, with a rated capacity not exceeding 230 mm. For grinders, the rated no-load speed does not exceed a peripheral speed of the accessory of 80 m/s at rated capacity.
This standard does not apply to dedicated cut-off machines.
This standard does not apply to orbital polishers and orbital sanders.
This standard does not apply to die grinders.
This Part 2-3 is to be used in conjunction with the first edition of IEC 62841-1:2014.
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. The contents of the corrigendum of April 2021 have been included in this copy.

Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 2-3: Exigences particulières pour les meuleuses portatives et pour les lustreuses et ponceuses portatives du type à disque

IEC 62841-2-3:2020 s'applique aux meuleuses portatives, aux lustreuses portatives du type à disque et aux ponceuses portatives du type à disque, y compris dans leur version d'angle, droite ou verticale, prévues pour une utilisation sur divers matériaux à l'exception du magnésium, et dont la capacité assignée ne dépasse pas 230 mm. Pour les meuleuses, la vitesse assignée à vide ne dépasse pas une vitesse périphérique de l'accessoire de 80 m/s à la capacité assignée.
La présente norme ne s'applique pas aux tronçonneuses dédiées.
La présente norme ne s'applique pas aux lustreuses orbitales ni aux ponceuses orbitales.
La présente norme ne s'applique pas aux meules à rectifier les matrices.
L'attention des Comités nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication IEC, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés.
Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 36 mois après la date de publication. Le contenu du corrigendum d'avril 2021 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 17-Oct-2024
• ICS: 25.140.20 - Electric tools
• Technical Committee: TC 116 - Safety of motor-operated electric tools
• Drafting Committee: WG 8 - TC 116/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 14-Apr-2020
• Completion Date: 01-May-2020

Relations

• Amended By: IEC 62841-2-3:2020/AMD1:2024 - Amendment 1 - Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and disc-type sanders
• Effective Date: 05-Sep-2023
• Corrected By: IEC 62841-2-3:2020/COR1:2021 - Corrigendum 1 - Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and disc-type sanders
• Effective Date: 05-Sep-2023

Overview

IEC 62841-2-3:2020 (Edition 1.1 2024-10) is the IEC safety standard for electric motor‑operated hand‑held grinders, disc‑type polishers and disc‑type sanders. It defines particular safety requirements for angle, straight and vertical tools intended for use on various materials (except magnesium) with a rated accessory size not exceeding 230 mm. For grinders the standard limits the rated no‑load speed so that the accessory peripheral speed does not exceed 80 m/s at rated capacity. This Part 2‑3 is intended to be used together with IEC 62841‑1:2014 (general requirements) and consolidates the first edition, its corrigendum (April 2021) and Amendment 1 (2024‑10).

Key topics and technical requirements

The standard addresses practical and testable safety measures, including:

• Scope and classification for angle, straight and vertical grinders, disc‑type polishers and sanders (exclusions: dedicated cut‑off machines, orbital polishers/sanders, die grinders).
• Marking and instructions requirements for safe operation, accessory selection and warnings.
• Mechanical hazards and strength: requirements and tests for construction, guards and handles (wheel guard types and guard thickness guidance are given in Annexes AA and BB).
• Wheel/flange specifications and testing: flange dimensions, torque tests and wheel type specifications (Annex CC).
• Wheel guard strength tests and construction details: illustrated test procedures and guard performance criteria.
• Noise and vibration measurement: informative guidance for emission testing (Annex I).
• Electrical and thermal safety: protection against live parts, starting behaviour, heating, moisture resistance, and endurance testing.
• Battery tool provisions: normative annexes for battery tools and packs, including battery tools with mains or non‑isolated sources (Annexes K and L).

Practical applications and who uses this standard

IEC 62841‑2‑3 is essential for:

• Tool manufacturers and product designers - to design compliant grinders, polishers and sanders and select appropriate guards, flanges and accessories.
• Test laboratories and certification bodies - to perform mechanical, electrical and noise/vibration tests required for market access and safety certification.
• Compliance officers, safety engineers and procurement teams - to verify conformity, write specifications and ensure safe selection and operation of power tools.
• Importers and retailers - to confirm documentation, labeling and instructions comply with international safety expectations.

Typical applications include design validation and conformity assessment for consumer and professional angle grinders, straight grinders, vertical grinders, disc‑type polishers and disc‑type sanders used in metalworking, masonry, concrete finishing and surface preparation (excluding use on magnesium).

Related standards and implementation notes

• Use in conjunction with IEC 62841‑1:2014 (general safety requirements for motor‑operated hand‑held tools).
• The IEC committee recommends a national adoption transition period (not earlier than 36 months after publication) to allow manufacturers and test labs to adapt to new or revised requirements.

Keywords: IEC 62841‑2‑3, hand‑held grinders, angle grinder safety, disc‑type polisher, disc‑type sander, wheel guard, grinder standards, power tool safety, IEC 62841.

Standards Content (Sample)

IEC 62841-2-3 ®
Edition 1.1 2024-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and
disc-type sanders
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IEC 62841-2-3 ®
Edition 1.1 2024-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and
disc-type sanders
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.140.20 ISBN 978-2-8322-9934-0
REDLINE VERSION – 2 – IEC 62841-2-3:2020+AMD1:2024 CSV
© IEC 2024
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 11
5 General conditions for the tests . 11
6 Radiation, toxicity and similar hazards . 12
7 Classification . 12
8 Marking and instructions . 12
9 Protection against access to live parts . 24
10 Starting . 24
11 Input and current . 24
12 Heating . 24
13 Resistance to heat and fire . 24
14 Moisture resistance . 24
15 Resistance to rusting . 25
16 Overload protection of transformers and associated circuits . 25
17 Endurance . 25
18 Abnormal operation . 25
19 Mechanical hazards . 25
20 Mechanical strength . 33
21 Construction . 44
22 Internal wiring . 48
23 Components . 48
24 Supply connection and external flexible cords . 48
25 Terminals for external conductors . 48
26 Provision for earthing . 49
27 Screws and connections . 49
28 Creepage distances, clearances and distances through insulation . 49
Annexes . 50
Annex I (informative) Measurement of noise and vibration emissions . 50
Annex K (normative) Battery tools and battery packs . 60
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 63
Annex AA (normative) Wheel guard types . 64
Annex BB (informative) Material and thickness of wheel guards . 73
Annex CC (normative) Wheel type specifications . 74
Bibliography . 80

Figure 101 – Example of an angle grinder . 9
Figure 102 – Example of a straight grinder . 10
Figure 103 – Example of a vertical grinder . 10

© IEC 2024
Figure 116 – Example of a concrete surface grinder . 11
Figure 104 – Examples of gaps and rake angles Examples of segmented diamond
cutting wheel constructions . 23
Figure 105 – Principal dimensions of flanges for wheels other than Type 4 . 30
Figure 106 – Principal dimensions of flanges for wheels type 4 . 30
Figure Z101 – Depressed centre of abrasive wheels . 31
Figure 107 – Wheel guard strength test: explanation of wheel guard positions . 36
Figure 108 – Wheel guard strength test: preparation of the grinder . 37
Figure 109 – Wheel guard strength test: preparation of cup wheel types 6 and 11 . 38
Figure 110 – Wheel guard strength test: angle grinders and vertical grinders without
side handles . 39
Figure 111 – Wheel guard strength test box . 40
Figure 112 – Wheel guard strength test: straight grinder with additional masses . 44
Figure 113 – Measurement of handle gripping length . 46
Figure 114 – Measurement of handle gripping length . 47
Figure 115 – Measurement of handle gripping length for a handle with finger grips or
similar superimposed profiles . 47
Figure I.101 – Positions of transducers for straight grinders . 51
Figure I.102 – Positions of transducers for angle grinders . 51
Figure I.103 – Positions of transducers for disc-type polishers and disc-type sanders . 51
Figure I.104 – Artificial grinding wheel for angle grinding and concrete grinding . 54
Figure I.105 – Working positions of operator and application of force . 55
Figure I.106 – Artificial grinding wheel for straight grinding . 57
Figure AA.1 – Design example for wheel guard of Type A (cut-off wheel guard) . 64
Figure AA.2 – Wheel guard of Type B (grinding wheel guard) . 66
Figure AA.3 – Wheel guard of Type C (combination wheel guard) . 67
Figure AA.4 – Adjustable wheel guard of Type D (cup wheel guard) . 68
Figure AA.5 – Wheel guard of Type E (diamond grinding wheel guard) . 69
Figure AA.6 – Wheel guard of Type F (masonry cut-off wheel guard) . 70
Figure AA.7 – Wheel guard of Type G (straight grinder wheel guard) . 72
Figure CC.1 – Wheel type 1 . 74
Figure CC.2 – Wheel type 4 . 75
Figure CC.3 – Wheel type 6 . 75
Figure CC.4 – Wheel type 11 . 76
Figure CC.5 – Wheel type 27 . 77
Figure CC.6 – Wheel type 28 . 77
Figure CC.7 – Wheel type 29 . 78
Figure CC.8 – Wheel type 41 . 78
Figure CC.9 – Wheel type 42 . 79

Table 4 – Required performance levels . 25
Table 101 – Accessories and guards for various applications . 28
Table Z101 – Dimensions of depressed centre wheels . 31
Table 102 – Minimum flange dimensions for wheel type 4 . 32

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© IEC 2024
Table 103 – Torques for testing flanges . 33
Table 104 – Typical pre-cut length ranges for standard wheel dimensions . 38
Table 105 – Guard thickness for diamond cutting wheels . 41
Table 106 –Typical pre-cut length ranges for standard wheel dimensions . 43
Table I.101 – Test conditions for angle grinding and concrete grinding . 52
Table I.102 – Dimensions of the artificial wheel of Figure I.104 or Figure I.106 for angle
grinding, cutting off and concrete grinding. 56
Table I.103 – Feed force . 56
Table I.104 – Test conditions for straight grinding . 56
Table I.105 – Dimensions of the artificial wheel of Figure I.106 for straight grinding . 57
Table I.106 – Test conditions for polishing . 58
Table I.107 – Test conditions for disc-type sanding . 58
Table 4 – Required performance levels . 60
Table BB.101 – Wheel guard thickness . 73

© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 2-3: Particular requirements for hand-held grinders,
disc-type polishers and disc-type sanders

FOREWORD
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62841-2-3 edition 1.1 contains the first edition (2020-04) [documents 116/444/FDIS
and 116/454/RVD], its corrigendum 1 (2021-04) and its amendment 1 (2024-10)
[documents 116/813/FDIS and 116/832/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
REDLINE VERSION – 6 – IEC 62841-2-3:2020+AMD1:2024 CSV
© IEC 2024
International Standard IEC 62841-2-3 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This Part 2-3 is to be used in conjunction with the first edition of IEC 62841-1:2014.
This Part 2-3 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held grinders, disc-type
polishers and disc-type sanders.
Where a particular subclause of Part 1 is not mentioned in this Part 2-3, 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 in bold typeface in the text are defined in Clause 3
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 document and its amendment will remain
unchanged until the stability date indicated on the IEC website under webstore.iec.ch in the
data related to the specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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 document 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.
© IEC 2024
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 2-3: Particular requirements for hand-held grinders,
disc-type polishers and disc-type sanders

1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 document applies to hand-held grinders, disc-type polishers and
disc-type sanders, including angle, straight and vertical tools, intended for use on various
materials except magnesium, with a rated capacity not exceeding 230 mm. For grinders, the
rated no-load speed does not exceed a peripheral speed of the accessory of 80 m/s at
rated capacity.
This document also applies to concrete surface grinders for use on various masonry
materials with a rated capacity not exceeding 230 mm.
This document does not apply to grinders intended to be fitted with an accessory other than
a bonded abrasive product or a diamond wheel.
This document does not apply to grinders intended to be fitted with diamond wheels with
– peripheral gaps exceeding 10 mm; or
– a positive rake angle.
This standard document does not apply to dedicated cut-off machines.
NOTE 101 It is planned that a document on cut-off machines will be published.
This standard document does not apply to orbital polishers and orbital sanders.
NOTE 102 It is planned that a document on orbital polishers and orbital sanders will be published. Orbital
polishers and orbital sanders are covered by IEC 62841-2-4.
This standard document does not apply to die grinders.
NOTE 103 Die grinders are covered by IEC 62841-2-23. It is planned that a document on die grinders will be
published.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
ISO 525:20132020, Bonded abrasive products – General requirements Shape types,
designation and marking
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© IEC 2024
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.101
blotter
thin piece of an easily compressible material, between the abrasive product and flange
3.102
diamond wheel
metal wheel with continuous or segmented diamond abrasives
3.102.1
diamond cutting wheel
metal wheel with the abrasives located on the periphery of the wheel
3.102.2
diamond grinding wheel
metal wheel with abrasives located on the face of the wheel
3.103
disc-type polisher
tool equipped with a rotating flexible disc or pad intended for polishing
Note 101 to entry: Polishing is an operation to produce a smooth or shiny surface.
3.104
disc-type sander
tool, constructed like a grinder, intended for sanding
Note 101 to entry: Sanding is an operation to remove material using flexible abrasive material, such as
sandpaper.
3.105
flange
collar, disc or plate between or against which wheels are mounted
3.105.1
unrecessed (flange)
flange fixed to the machine spindle having an unrecessed flat surface against which a
threaded hole abrasive product is screwed, e.g. a cup wheel, a cone or a plug
3.105.2
inner flange
flange which contacts and provides support to the back side of the wheel and is located on
the spindle between wheel and tool
3.105.3
outer flange
flange which supports the front side of the wheel and secures and clamps the wheel to the
spindle and the inner flange
Note 101 to entry: In Canada and the United States of America, the following additional definition applies:
3.105.UC1
adaptor backing flange
inner flange which contacts and supports in the hub area and extends past the raised portion to reduce the flexing
of the wheel periphery
© IEC 2024
3.106
grinder
tool driving a rotating spindle on which a bonded abrasive product or a diamond wheel is
mounted
3.106.1
angle grinder
grinder with the rotating spindle at an angle to the axis of the tool body which acts as a
grasping surface, intended for peripheral and lateral grinding
Note 101 to entry: See Figure 101.

Figure 101 – Example of an angle grinder
3.106.2
straight grinder
grinder with the rotating spindle in-line with the axis of the tool body which acts as a grasping
surface, intended for peripheral grinding only and not equipped with a collet or chuck
Note 101 to entry: See Figure 102.

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Figure 102 – Example of a straight grinder
3.106.3
vertical grinder
grinder with the rotating spindle in-line with the axis of the tool body and with handles that
are substantially perpendicular to the axis of the rotating spindle, intended for peripheral and
lateral grinding
Note 101 to entry: See Figure 103.

Figure 103 – Example of a vertical grinder
3.106.4
concrete surface grinder
grinder intended for facial grinding with a diamond grinding wheel and not intended for
other grinding or cut-off operations
Note 101 to entry: See Figure 116.

© IEC 2024
Figure 116 – Example of a concrete surface grinder
3.107
guide plate
flat plate on the machine which rests on the material to be cut
3.108
guide roller
roller on the machine which rests on the material to be cut
3.109
minor fragment
particles less than 1/16 of the mass of the abrasive wheel
3.110
rated capacity
maximum diameter of the rotating accessory to be fitted on the tool as specified by the
manufacturer’s instruction
3.111
wheel guard
device which partly encloses the abrasive wheel and gives protection to the operator
3.112
wheel types
alphanumeric designation of wheels based upon application and shape
Note 101 to entry: Shapes for wheel types are given in Annex CC.
4 General requirements
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows:
5.17 Addition:
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© IEC 2024
The mass of a grinder includes the wheel guard, the flanges and the handles.
The mass of a disc-type polisher or disc-type sander includes the flanges and the handles.
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 also be marked with:
– rated no-load speed;
– rated capacity.
NOTE 101 The requirement for marking rated capacity does not prohibit the additional marking of smaller
permitted diameters of the rotating accessory other than rated capacity (e.g. 115 mm / 125 mm, where 125 mm is
the rated capacity).
8.2 Addition:
Tools shall also be marked with:
“ WARNING Always wear eye protection” or sign M004 of ISO 7010 or the following safety
sign:
The eye protection symbol may be modified by adding other personal protective equipment
such as ear protection, dust mask, etc.
Tools that require at least two handles in accordance with 19.4 shall be marked with
– “ WARNING Always operate with two hands”; or
– the following safety sign:
© IEC 2024
NOTE In Canada and the United States of America, the following additional requirements apply:
Tools shall be marked with the following additional safety warnings:
– "WARNING – To reduce the risk of injury, use only accessories rated at least equal to the maximum speed
marked on the tool."
In Canada, the equivalent French wording of the above warning is as follows: “AVERTISSEMENT – Pour
réduire le risque de blessure, utiliser uniquement les accessoires convenant au moins à la vitesse maximale
inscrite sur l’outil.”
All grinders required to have a wheel guard by 19.101.2 shall be marked with the following warning:
– “WARNING – To reduce the risk of injury, always use proper guards when grinding.”
In Canada, the equivalent French wording of the above warning is as follows: “AVERTISSEMENT – Pour
réduire le risque de blessure, utiliser toujours les protecteurs appropriés pendant le meulage.”
If the above cautionary markings are included as part of a list of cautionary markings, the words “WARNING –
To reduce the risk of injury” need not be repeated.
8.2.101 A Type B wheel guard in accordance with Annex AA shall be marked with
– “ WARNING Not for cut-off operations”; or
– the following safety sign:
8.3 Addition:
Tools provided with a threaded spindle intended to accept threaded accessories in
accordance with 8.14.2 shall be marked with the spindle thread size.
The direction of rotation of the spindle shall be indicated on the tool by an arrow, raised or
recessed or by any other means no less visible and indelible.
8.4 Modification:
The marking specified in 8.2.101 may be located on a Type B wheel guard that is a
detachable part.
8.6 Addition:
linear dimension . mm
always operate with two hands
do not use this type of guard for cut-off operations

8.12 Addition:
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© IEC 2024
The safety sign required by 8.2.101 need not be in accordance with the red colour
requirements of ISO 3864-2.
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".
In these safety instructions, terms such as grinding or grinder, sanding or sander, concrete
surface grinder or concrete surface grinding, wire brushing or wire brush, polishing or
polisher, or cutting-off or cut-off tool are selected as specified by the manufacturer. These
terms in the warnings and headings shall be consistently used or deleted based on the
selected operations. The "and"/"or" conjunctions may be used as appropriate.
If the power tool is intended only for one of the listed operations, the heading of that section is
to be used for all warnings. Grinding and cutting off shall be included for angle grinders with
a rated capacity exceeding 55 mm.
8.14.1.101 Additional safety instructions for grinders, disc-type polishers and disc-
type sanders
8.14.1.101.1 General
The additional safety instructions as specified in 8.14.1.101.2 to 8.14.1.101.8 shall be given.
This part may be printed separately from the "General Power Tool Safety Warnings".
In these safety instructions, terms such as grinding/grinder, sanding/sander, wire
brushing/wire brush, polishing/polisher or cutting-off/cut-off tool are selected as specified by
the manufacturer. These terms in the warnings and headings shall be consistently used or
deleted based on the selected operations. The “and”/“or” conjunctions may be used as
appropriate.
If the power tool is intended only for one of the listed operations, the heading of that section is
to be used for all warnings.
8.14.1.101.2 Safety instructions for all operations
Safety warnings common for grinding, sanding, wire brushing, polishing or cutting-off
operations:
NOTE 101 In the above heading, those operations not applicable are omitted.
a) This power tool is intended to function as a grinder, sander, wire brush, polisher,
hole cutter or cut-off tool. Read all safety warnings, instructions, illustrations and
specifications provided with this power tool. Failure to follow all instructions listed
below may result in electric shock, fire and/or serious injury.
NOTE 102 Only the applicable operations are listed.
b) Operations such as grinding, sanding, wire brushing, polishing, hole cutting or
cutting-off are not to be performed with this power tool. Operations for which the
power tool was not designed may create a hazard and cause personal injury.
NOTE 103 Only those operations are listed that were not included in the first warning. If all listed operations
are intended, then this warning is omitted, but all subsequent warnings are given without exclusion.
c) Do not convert this power tool to operate in a way which is not specifically designed
and specified by the tool manufacturer. Such a conversion may result in a loss of
control and cause serious personal injury.
d) Do not use accessories which are not specifically designed and specified by the tool
manufacturer. Just because the accessory can be attached to your power tool, it does not
assure safe operation.
© IEC 2024
e) 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.
f) The outside diameter and the thickness of your accessory must be within the
capacity rating of your power tool. Incorrectly sized accessories cannot be adequately
guarded or controlled.
g) The dimensions of the accessory mounting must fit the dimensions of the mounting
hardware of the power tool. Accessories that do not match the mounting hardware of the
power tool will run out of balance, vibrate excessively and may cause loss of control.
h) Do not use a damaged accessory. Before each use inspect the accessory such as
abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear,
wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect
for damage or install an undamaged accessory. 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.
i) Wear personal protective equipment. Depending on application, use face shield,
safety goggles or safety glasses. As appropriate, wear dust mask, hearing
protectors, gloves and workshop apron capable of stopping small abrasive or
workpiece fragments. The eye protection must be capable of stopping flying debris
generated by various applications. The dust mask or respirator must be capable of
filtrating particles generated by the particular application. Prolonged exposure to high
intensity noise may cause hearing loss.
j) Keep bystanders a safe distance away from work area. Anyone entering the work
area must wear personal protective equipment. Fragments of workpiece or of a broken
accessory may fly away and cause injury beyond immediate area of operation.
k) Hold the power tool by insulated gripping surfaces only, when performing an
operation where the cutting accessory may contact hidden wiring or its own cord.
Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool
"live" and could give the operator an electric shock.
NOTE 104 The above warning is omitted if polishing or sanding are the only Intended operations.
l) Position the cord clear of the spinning accessory. If you lose control, the cord may be
cut or snagged and your hand or arm may be pulled into the spinning accessory.
m) Never lay the power tool down until the accessory has come to a complete stop. The
spinning accessory may grab the surface and pull the power tool out of your control.
n) Do not run the power tool while carrying it at your side. Accidental contact with the
spinning accessory could snag your clothing, pulling the accessory into your body.
o) Regularly clean the power tool’s air vents. The motor’s fan will draw the dust inside the
housing and excessive accumulation of powdered metal may cause electrical hazards.
p) Do not operate the power tool near flammable materials. Sparks could ignite these
materials.
q) Do not use accessories that require liquid coolants. Using water or other liquid
coolants may result in electrocution or shock.
NOTE 105 The above warning does not apply for power tools specifically designed for use with a liquid
system.
8.14.1.101.3 Further safety instructions for all operations
Kickback and related warnings:
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or
any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power tool to be forced in the direction opposite of the
accessory’s rotation at the point of the binding.

REDLINE VERSION – 16 – IEC 62841-2-3:2020+AMD1:2024 CSV
© IEC 2024
For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the
wheel that is entering into the pinch point can dig into the surface of the material causing the
wheel to climb out or kick out. The wheel may either jump toward or away from the operator,
depending on direction of the wheel’s movement at the point of pinching. Abrasive wheels
may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or
conditions and can be avoided by taking proper precautions as given below.
a) Maintain a firm grip with both hands on the power tool and position your body and
arms to allow you to resist kickback forces. Always use auxiliary handle, if
provided, for maximum control over kickback or torque reaction during start-up. The
operator can control torque reactions or kickback forces, if proper precautions are taken.
b) Never place your hand near the rotating accessory. Accessory may kickback over your
hand.
c) Do not position your body in the area where power tool will move if kickback
occurs. Kickback will propel the tool in direction opposite to the wheel’s movement at the
point of snagging.
d) Use special care when working corners, sharp edges, etc. Avoid bouncing and
snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the
rotating accessory and cause loss of control or kickback.
e) Do not attach a saw chain woodcarving blade, segmented diamond wheel with a
peripheral gap greater than 10 mm or toothed saw blade. Such blades create frequent
kickback and loss of control.
8.14.1.101.4 Additional safety instructions for grinding and cutting-off operations
NOTE 101 If grinding and cutting-off operations are not Intended by the manufacturer, this subclause is omitted.
Safety warnings specific for grinding and cutting-off operations:
a) Use only wheel types that are specified for your power tool and the specific guard
designed for the selected wheel. Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
b) The grinding surface of centre depressed wheels must be mounted below the plane
of the guard lip. An improperly mounted wheel that projects through the plane of the
guard lip cannot be adequately protected.
c) The guard must be securely attached to the power tool and positioned for maximum
safety, so the least amount of wheel is exposed towards the operator. The guard
helps to protect the operator from broken wheel fragments, accidental contact with wheel
and sparks that could ignite clothing.
NOTE 102 The above warning is omitted for grinders with a rated capacity of less than 55 mm.
d) Wheels must be used only for specified applications. For example: do not grind with
the side of cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding,
side forces applied to these wheels may cause them to shatter.
e) Always use undamaged wheel flanges that are of correct size and shape for your
selected wheel. Proper wheel flanges support the wheel thus reducing the possibility of
wheel breakage. Flanges for cut-off wheels may be different from grinding wheel flanges.
f) Do not use worn down wheels from larger power tools. A wheel intended for larger
power tool is not suitable for the higher speed of a smaller tool and may burst.
NOTE 103 The above warning does not apply for tools only designated to be used with diamond wheels.
g) When using dual purpose wheels always use the correct guard for the application
being performed. Failure to use the correct guard may not provide the desired level of
guarding, which could lead to serious injury.

© IEC 2024
8.14.1.101.5 Additional safety instructions for cutting-off operations
NOTE 101 If cutting-off operation is not intended by the manufacturer, this subclause is omitted.
Additional safety warnings specific for cutting-off operations:
a) Do not “jam” the cut-off wheel or apply excessive pressure. Do not attempt to make
an excessive depth of cut. Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback or
wheel breakage.
b) Do not position your body in line with and behind the rotating wheel. When the
wheel, at the point of operation, is moving away from your body, the possible kickback
may propel the spinning wheel and the power tool directly at you.
c) When the wheel is binding or when interrupting a cut for any reason, switch off the
power tool and hold it motionless until the wheel comes to a complete stop. Never
attempt to remove the cut-off wheel from the cut while the wheel is in motion
otherwise kickback may occur. Investigate and take corrective action to eliminate the
cause of wheel binding.
d) Do not restart the cutting operation in the workpiece. Let the wheel reach full speed
and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool
is restarted in the workpiece.
e) Support panels or any oversized workpiece to mini
...

IEC 62841-2-3 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and
disc-type sanders
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-3: Exigences particulières pour les meuleuses portatives et pour les
lustreuses et ponceuses portatives du type à disque

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IEC 62841-2-3 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety –
Part 2-3: Particular requirements for hand-held grinders, disc-type polishers and

disc-type sanders
Outils électroportatifs à moteur, outils portables et machines pour jardins et

pelouses – Sécurité –
Partie 2-3: Exigences particulières pour les meuleuses portatives et pour les

lustreuses et ponceuses portatives du type à disque

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20 ISBN 978-2-8322-8100-0

– 2 – IEC 62841-2-3:2020 © IEC 2020
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements . 10
5 General conditions for the tests . 11
6 Radiation, toxicity and similar hazards . 11
7 Classification . 11
8 Marking and instructions . 11
9 Protection against access to live parts . 18
10 Starting . 18
11 Input and current . 18
12 Heating . 18
13 Resistance to heat and fire . 18
14 Moisture resistance . 18
15 Resistance to rusting . 18
16 Overload protection of transformers and associated circuits . 19
17 Endurance . 19
18 Abnormal operation . 19
19 Mechanical hazards . 19
20 Mechanical strength . 27
21 Construction . 37
22 Internal wiring . 41
23 Components . 41
24 Supply connection and external flexible cords . 41
25 Terminals for external conductors . 41
26 Provision for earthing . 41
27 Screws and connections . 41
28 Creepage distances, clearances and distances through insulation . 41
Annexes . 42
Annex I (informative) Measurement of noise and vibration emissions . 42
Annex K (normative) Battery tools and battery packs . 51
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 54
Annex AA (normative) Wheel guard types . 55
Annex BB (informative) Material and thickness of wheel guards . 61
Annex CC (normative) Wheel type specifications . 62
Bibliography . 68

Figure 101 – Example of an angle grinder . 9
Figure 102 – Example of a straight grinder . 9
Figure 103 – Example of a vertical grinder . 10

Figure 104 – Examples of gaps and rake angles . 17
Figure 105 – Principal dimensions of flanges for wheels other than Type 4 . 24
Figure 106 – Principal dimensions of flanges for wheels type 4 . 24
Figure Z101 – Depressed centre of abrasive wheels . 25
Figure 107 – Wheel guard strength test: explanation of wheel guard positions . 29
Figure 108 – Wheel guard strength test: preparation of the grinder . 30
Figure 109 – Wheel guard strength test: preparation of cup wheel types 6 and 11 . 31
Figure 110 – Wheel guard strength test: angle grinders and vertical grinders without
side handles . 32
Figure 111 – Wheel guard strength test box . 33
Figure 112 – Wheel guard strength test: straight grinder with additional masses . 37
Figure 113 – Measurement of handle gripping length . 39
Figure 114 – Measurement of handle gripping length . 40
Figure 115 – Measurement of handle gripping length for a handle with finger grips or
similar superimposed profiles . 40
Figure I.101 – Positions of transducers for straight grinders . 42
Figure I.102 – Positions of transducers for angle grinders . 43
Figure I.103 – Positions of transducers for disc-type polishers and disc-type sanders . 43
Figure I.104 – Artificial grinding wheel for angle grinding and concrete grinding . 45
Figure I.105 – Working positions of operator and application of force . 46
Figure I.106 – Artificial grinding wheel for straight grinding . 48
Figure AA.1 – Design example for wheel guard of Type A (cut-off wheel guard) . 55
Figure AA.2 – Wheel guard of Type B (grinding wheel guard) . 56
Figure AA.3 – Wheel guard of Type C (combination wheel guard) . 57
Figure AA.4 – Adjustable wheel guard of Type D (cup wheel guard) . 57
Figure AA.5 – Wheel guard of Type E (diamond surface grinding wheel guard) . 58
Figure AA.6 – Wheel guard of Type F (masonry cut-off wheel guard) . 59
Figure AA.7 – Wheel guard of Type G (straight grinder wheel guard) . 60
Figure CC.1 – Wheel type 1 . 62
Figure CC.2 – Wheel type 4 . 63
Figure CC.3 – Wheel type 6 . 63
Figure CC.4 – Wheel type 11 . 64
Figure CC.5 – Wheel type 27 . 65
Figure CC.6 – Wheel type 28 . 65
Figure CC.7 – Wheel type 29 . 66
Figure CC.8 – Wheel type 41 . 66
Figure CC.9 – Wheel type 42 . 67

Table 4 – Required performance levels . 19
Table 101 – Accessories and guards for various applications . 22
Table Z101 – Dimensions of depressed centre wheels . 25
Table 102 – Minimum flange dimensions for wheel type 4 . 26
Table 103 – Torques for testing flanges . 26
Table 104 – Typical pre-cut length ranges for standard wheel dimensions . 31

– 4 – IEC 62841-2-3:2020 © IEC 2020
Table 105 – Guard thickness for diamond cutting wheels . 34
Table 106 –Typical pre-cut length ranges for standard wheel dimensions . 36
Table I.101 – Test conditions for angle grinding and concrete grinding . 44
Table I.102 – Dimensions of the artificial wheel of Figure I.104 or Figure I.106 for angle
grinding, cutting off and concrete grinding. 46
Table I.103 – Feed force . 46
Table I.104 – Test conditions for straight grinding . 47
Table I.105 – Dimensions of the artificial wheel of Figure I.106 for straight grinding . 48
Table I.106 – Test conditions for polishing . 49
Table I.107 – Test conditions for disc-type sanding . 49
Table 4 – Required performance levels . 51
Table BB.101 – Wheel guard thickness . 61

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 2-3: Particular requirements for hand-held grinders,
disc-type polishers and disc-type sanders

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
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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
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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 62841-2-3 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
The text of this International standard is based on the following documents:
FDIS Report on voting
116/444/FDIS 116/454/RVD
Full information on the voting for the approval of this International standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 6 – IEC 62841-2-3:2020 © IEC 2020
This Part 2-3 is to be used in conjunction with the first edition of IEC 62841-1:2014.
This Part 2-3 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held grinders, disc-type
polishers and disc-type sanders.
Where a particular subclause of Part 1 is not mentioned in this Part 2-3, 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 in bold typeface in the text are defined in Clause 3
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.

ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 2-3: Particular requirements for hand-held grinders,
disc-type polishers and disc-type sanders

1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to hand-held grinders, disc-type polishers and disc-type
sanders, including angle, straight and vertical tools, intended for use on various materials
except magnesium, with a rated capacity not exceeding 230 mm. For grinders, the rated no-
load speed does not exceed a peripheral speed of the accessory of 80 m/s at rated
capacity.
This standard does not apply to dedicated cut-off machines.
NOTE 101 It is planned that a document on cut-off machines will be published.
This standard does not apply to orbital polishers and orbital sanders.
NOTE 102 It is planned that a document on orbital polishers and orbital sanders will be published.
This standard does not apply to die grinders.
NOTE 103 Die grinders are covered by IEC 62841-2-23.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
ISO 525:2013, Bonded abrasive products – General requirements
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.101
blotter
thin piece of an easily compressible material, between the abrasive product and flange
3.102
diamond wheel
metal wheel with continuous or segmented diamond abrasives

– 8 – IEC 62841-2-3:2020 © IEC 2020
3.102.1
diamond cutting wheel
metal wheel with the abrasives located on the periphery of the wheel
3.102.2
diamond grinding wheel
metal wheel with abrasives located on the face of the wheel
3.103
disc-type polisher
tool equipped with a rotating flexible disc or pad intended for polishing
Note 101 to entry: Polishing is an operation to produce a smooth or shiny surface.
3.104
disc-type sander
tool, constructed like a grinder, intended for sanding
Note 101 to entry: Sanding is an operation to remove material using flexible abrasive material, such as
sandpaper.
3.105
flange
collar, disc or plate between or against which wheels are mounted
3.105.1
unrecessed (flange)
flange fixed to the machine spindle having an unrecessed flat surface against which a
threaded hole abrasive product is screwed, e.g. a cup wheel, a cone or a plug
3.105.2
inner flange
flange which contacts and provides support to the back side of the wheel and is located on
the spindle between wheel and tool
3.105.3
outer flange
flange which supports the front side of the wheel and secures and clamps the wheel to the
spindle and the inner flange
Note 101 to entry: In Canada and the United States of America, the following additional definition applies:
3.105.UC1
adaptor backing flange
inner flange which contacts and supports in the hub area and extends past the raised portion to reduce the flexing
of the wheel periphery
3.106
grinder
tool driving a rotating spindle on which a bonded abrasive product or a diamond wheel is
mounted
3.106.1
angle grinder
grinder with the rotating spindle at an angle to the axis of the tool body which acts as a
grasping surface, intended for peripheral and lateral grinding
Note 101 to entry: See Figure 101.

Figure 101 – Example of an angle grinder
3.106.2
straight grinder
grinder with the rotating spindle in-line with the axis of the tool body which acts as a grasping
surface, intended for peripheral grinding only and not equipped with a collet or chuck
Note 101 to entry: See Figure 102.

Figure 102 – Example of a straight grinder
3.106.3
vertical grinder
grinder with the rotating spindle in-line with the axis of the tool body and with handles that
are substantially perpendicular to the axis of the rotating spindle, intended for peripheral and
lateral grinding
Note 101 to entry: See Figure 103.

– 10 – IEC 62841-2-3:2020 © IEC 2020

Figure 103 – Example of a vertical grinder
3.107
guide plate
flat plate on the machine which rests on the material to be cut
3.108
guide roller
roller on the machine which rests on the material to be cut
3.109
minor fragment
particles less than 1/16 of the mass of the abrasive wheel
3.110
rated capacity
maximum diameter of the rotating accessory to be fitted on the tool as specified by the
manufacturer’s instruction
3.111
wheel guard
device which partly encloses the abrasive wheel and gives protection to the operator
3.112
wheel types
alphanumeric designation of wheels based upon application and shape
Note 101 to entry: Shapes for wheel types are given in Annex CC.
4 General requirements
This clause of Part 1 is applicable.

5 General conditions for the tests
This clause of Part 1 is applicable, except as follows:
5.17 Addition:
The mass of a grinder includes the wheel guard, the flanges and the handles.
The mass of a disc-type polisher or disc-type sander includes the flanges and the handles.
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 also be marked with:
– rated no-load speed;
– rated capacity.
NOTE 101 The requirement for marking rated capacity does not prohibit the additional marking of smaller
permitted diameters of the rotating accessory other than rated capacity (e.g. 115 mm / 125 mm, where 125 mm is
the rated capacity).
8.2 Addition:
Tools shall also be marked with:
“ WARNING Always wear eye protection” or sign M004 of ISO 7010 or the following safety
sign:
The eye protection symbol may be modified by adding other personal protective equipment
such as ear protection, dust mask, etc.
Tools that require at least two handles in accordance with 19.4 shall be marked with
– “ WARNING Always operate with two hands”; or
– the following safety sign:
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NOTE In Canada and the United States of America, the following additional requirements apply:
Tools shall be marked with the following additional safety warnings:
– "WARNING – To reduce the risk of injury, use only accessories rated at least equal to the maximum speed
marked on the tool."
In Canada, the equivalent French wording of the above warning is as follows: “AVERTISSEMENT – Pour
réduire le risque de blessure, utiliser uniquement les accessoires convenant au moins à la vitesse maximale
inscrite sur l’outil.”
All grinders required to have a wheel guard by 19.101.2 shall be marked with the following warning:
– “WARNING – To reduce the risk of injury, always use proper guards when grinding.”
In Canada, the equivalent French wording of the above warning is as follows: “AVERTISSEMENT – Pour
réduire le risque de blessure, utiliser toujours les protecteurs appropriés pendant le meulage.”
If the above cautionary markings are included as part of a list of cautionary markings, the words “WARNING –
To reduce the risk of injury” need not be repeated.
8.2.101 A Type B wheel guard in accordance with Annex AA shall be marked with
– “ WARNING Not for cut-off operations”; or
– the following safety sign:
8.3 Addition:
Tools provided with a threaded spindle intended to accept threaded accessories in
accordance with 8.14.2 shall be marked with the spindle thread size.
The direction of rotation of the spindle shall be indicated on the tool by an arrow, raised or
recessed or by any other means no less visible and indelible.
8.6 Addition:
always operate with two hands
do not use the guard for cut-off operations

8.12 Addition:
The safety sign required by 8.2.101 need not be in accordance with the red colour
requirements of ISO 3864-2.
8.14.1.101 Additional safety instructions for grinders, disc-type polishers and disc-
type sanders
8.14.1.101.1 General
The additional safety instructions as specified in 8.14.1.101.2 to 8.14.1.101.8 shall be given.
This part may be printed separately from the "General Power Tool Safety Warnings".
In these safety instructions, terms such as grinding/grinder, sanding/sander, wire
brushing/wire brush, polishing/polisher or cutting-off/cut-off tool are selected as specified by
the manufacturer. These terms in the warnings and headings shall be consistently used or
deleted based on the selected operations. The “and”/“or” conjunctions may be used as
appropriate.
If the power tool is intended only for one of the listed operations, the heading of that section is
to be used for all warnings.
8.14.1.101.2 Safety instructions for all operations
Safety warnings common for grinding, sanding, wire brushing, polishing or cutting-off
operations:
NOTE 101 In the above heading, those operations not applicable are omitted.
a) This power tool is intended to function as a grinder, sander, wire brush, polisher,
hole cutter or cut-off tool. Read all safety warnings, instructions, illustrations and
specifications provided with this power tool. Failure to follow all instructions listed
below may result in electric shock, fire and/or serious injury.
NOTE 102 Only the applicable operations are listed.
b) Operations such as grinding, sanding, wire brushing, polishing, hole cutting or
cutting-off are not to be performed with this power tool. Operations for which the
power tool was not designed may create a hazard and cause personal injury.
NOTE 103 Only those operations are listed that were not included in the first warning. If all listed operations
are intended, then this warning is omitted, but all subsequent warnings are given without exclusion.
c) Do not convert this power tool to operate in a way which is not specifically designed
and specified by the tool manufacturer. Such a conversion may result in a loss of
control and cause serious personal injury.
d) Do not use accessories which are not specifically designed and specified by the tool
manufacturer. Just because the accessory can be attached to your power tool, it does not
assure safe operation.
e) 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.
f) The outside diameter and the thickness of your accessory must be within the
capacity rating of your power tool. Incorrectly sized accessories cannot be adequately
guarded or controlled.
g) The dimensions of the accessory mounting must fit the dimensions of the mounting
hardware of the power tool. Accessories that do not match the mounting hardware of the
power tool will run out of balance, vibrate excessively and may cause loss of control.
h) Do not use a damaged accessory. Before each use inspect the accessory such as
abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear,
wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect
for damage or install an undamaged accessory. 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.

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i) Wear personal protective equipment. Depending on application, use face shield,
safety goggles or safety glasses. As appropriate, wear dust mask, hearing
protectors, gloves and workshop apron capable of stopping small abrasive or
workpiece fragments. The eye protection must be capable of stopping flying debris
generated by various applications. The dust mask or respirator must be capable of
filtrating particles generated by the particular application. Prolonged exposure to high
intensity noise may cause hearing loss.
j) Keep bystanders a safe distance away from work area. Anyone entering the work
area must wear personal protective equipment. Fragments of workpiece or of a broken
accessory may fly away and cause injury beyond immediate area of operation.
k) Hold the power tool by insulated gripping surfaces only, when performing an
operation where the cutting accessory may contact hidden wiring or its own cord.
Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool
"live" and could give the operator an electric shock.
NOTE 104 The above warning is omitted if polishing or sanding are the only Intended operations.
l) Position the cord clear of the spinning accessory. If you lose control, the cord may be
cut or snagged and your hand or arm may be pulled into the spinning accessory.
m) Never lay the power tool down until the accessory has come to a complete stop. The
spinning accessory may grab the surface and pull the power tool out of your control.
n) Do not run the power tool while carrying it at your side. Accidental contact with the
spinning accessory could snag your clothing, pulling the accessory into your body.
o) Regularly clean the power tool’s air vents. The motor’s fan will draw the dust inside the
housing and excessive accumulation of powdered metal may cause electrical hazards.
p) Do not operate the power tool near flammable materials. Sparks could ignite these
materials.
q) Do not use accessories that require liquid coolants. Using water or other liquid
coolants may result in electrocution or shock.
NOTE 105 The above warning does not apply for power tools specifically designed for use with a liquid
system.
8.14.1.101.3 Further safety instructions for all operations
Kickback and related warnings:
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or
any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power tool to be forced in the direction opposite of the
accessory’s rotation at the point of the binding.
For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the
wheel that is entering into the pinch point can dig into the surface of the material causing the
wheel to climb out or kick out. The wheel may either jump toward or away from the operator,
depending on direction of the wheel’s movement at the point of pinching. Abrasive wheels
may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or
conditions and can be avoided by taking proper precautions as given below.
a) Maintain a firm grip with both hands on the power tool and position your body and
arms to allow you to resist kickback forces. Always use auxiliary handle, if
provided, for maximum control over kickback or torque reaction during start-up. The
operator can control torque reactions or kickback forces, if proper precautions are taken.
b) Never place your hand near the rotating accessory. Accessory may kickback over your
hand.
c) Do not position your body in the area where power tool will move if kickback
occurs. Kickback will propel the tool in direction opposite to the wheel’s movement at the
point of snagging.
d) Use special care when working corners, sharp edges, etc. Avoid bouncing and
snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the
rotating accessory and cause loss of control or kickback.
e) Do not attach a saw chain woodcarving blade, segmented diamond wheel with a
peripheral gap greater than 10 mm or toothed saw blade. Such blades create frequent
kickback and loss of control.
8.14.1.101.4 Additional safety instructions for grinding and cutting-off operations
NOTE 101 If grinding and cutting-off operations are not Intended by the manufacturer, this subclause is omitted.
Safety warnings specific for grinding and cutting-off operations:
a) Use only wheel types that are specified for your power tool and the specific guard
designed for the selected wheel. Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
b) The grinding surface of centre depressed wheels must be mounted below the plane
of the guard lip. An improperly mounted wheel that projects through the plane of the
guard lip cannot be adequately protected.
c) The guard must be securely attached to the power tool and positioned for maximum
safety, so the least amount of wheel is exposed towards the operator. The guard
helps to protect the operator from broken wheel fragments, accidental contact with wheel
and sparks that could ignite clothing.
NOTE 102 The above warning is omitted for grinders with a rated capacity of less than 55 mm.
d) Wheels must be used only for specified applications. For example: do not grind with
the side of cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding,
side forces applied to these wheels may cause them to shatter.
e) Always use undamaged wheel flanges that are of correct size and shape for your
selected wheel. Proper wheel flanges support the wheel thus reducing the possibility of
wheel breakage. Flanges for cut-off wheels may be different from grinding wheel flanges.
f) Do not use worn down wheels from larger power tools. A wheel intended for larger
power tool is not suitable for the higher speed of a smaller tool and may burst.
NOTE 103 The above warning does not apply for tools only designated to be used with diamond wheels.
g) When using dual purpose wheels always use the correct guard for the application
being performed. Failure to use the correct guard may not provide the desired level of
guarding, which could lead to serious injury.
8.14.1.101.5 Additional safety instructions for cutting-off operations
NOTE 101 If cutting-off operation is not intended by the manufacturer, this subclause is omitted.
Additional safety warnings specific for cutting-off operations:
a) Do not “jam” the cut-off wheel or apply excessive pressure. Do not attempt to make
an excessive depth of cut. Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback or
wheel breakage.
b) Do not position your body in line with and behind the rotating wheel. When the
wheel, at the point of operation, is moving away from your body, the possible kickback
may propel the spinning wheel and the power tool directly at you.

– 16 – IEC 62841-2-3:2020 © IEC 2020
c) When the wheel is binding or when interrupting a cut for any reason, switch off the
power tool and hold it motionless until the wheel comes to a complete stop. Never
attempt to remove the cut-off wheel from the cut while the wheel is in motion
otherwise kickback may occur. Investigate and take corrective action to eliminate the
cause of wheel binding.
d) Do not restart the cutting operation in the workpiece. Let the wheel reach full speed
and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool
is restarted in the workpiece.
e) Support panels or any oversized workpiece to minimize the risk of wheel pinching
and kickback. Large workpieces tend to sag under their own weight. Supports must be
placed under the workpiece near the line of cut and near the edge of the workpiece on
both sides of the wheel.
f) Use extra caution when making a “pocket cut” into existing walls or other blind
areas. The protruding wheel may cut gas or water pipes, electrical wiring or objects that
can cause kickback.
g) Do not attempt to do curved cutting. Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in the cut and the possibi
...