IEC 63241-2-3:2024

IEC 63241-2-3 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated tools – Dust measurement procedure –
Part 2-3: Particular requirements for hand-held concrete grinders and disc-type
sanders
Outils électroportatifs à moteur – Procédure de mesure de la poussière –
Partie 2-3: Exigences particulières pour les rectifieuses à béton et les ponceuses
à disque portatives
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IEC 63241-2-3 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated tools – Dust measurement procedure –

Part 2-3: Particular requirements for hand-held concrete grinders and disc-type

sanders
Outils électroportatifs à moteur – Procédure de mesure de la poussière –

Partie 2-3: Exigences particulières pour les rectifieuses à béton et les ponceuses

à disque portatives
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.30  ISBN 978-2-8322-9463-5

– 2 – IEC 63241-2-3:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test procedure . 5
5 Instrumentation . 8
6 Information to be reported . 8

Figure 101 – Test set-up for concrete grinders . 9
Figure 102 – A-support . 10
Figure 103 – Test set-up for sanding gypsum blocks . 11

Table 101 – Operating conditions for concrete grinders . 6
Table 102 – Operating conditions for disc-type sanders when sanding gypsum blocks . 7
Table 103 – Operating conditions for disc-type sanders when sanding wood . 7
Table 104 – Operating conditions for disc-type sanders when sanding wooden floors . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED TOOLS –
DUST MEASUREMENT PROCEDURE –
Part 2-3: Particular requirements for hand-held concrete
grinders 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 this end and
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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
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
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shall not be held responsible for identifying any or all such patent rights.
IEC 63241-2-3 has been prepared by IEC technical committee 116: Safety of motor-operated
electric tools. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
116/787/FDIS 116/808/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 4 – IEC 63241-2-3:2024 © IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 63241 series, under the general title: Electric motor-operated tools
– Dust measurement procedure, can be found on the IEC website.
This document is to be used in conjunction with IEC 63241-1:2023.
This document supplements or modifies the corresponding clauses in IEC 63241-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held concrete grinders and
disc-type sanders.
Where a particular subclause of IEC 63241-1 is not mentioned in this document, that subclause
applies as far as reasonable. Where this document states "addition", "modification" or
"replacement", the relevant text in IEC 63241-1 is to be adapted accordingly.
The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– terms defined in Clause 3: in bold type
notes: in small roman type.
–
Subclauses, notes, tables and figures which are additional to those in IEC 63241-1 are
numbered starting from 101.
The committee has decided that the contents of this document 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.

ELECTRIC MOTOR-OPERATED TOOLS –
DUST MEASUREMENT PROCEDURE –
Part 2-3: Particular requirements for hand-held concrete
grinders and disc-type sanders

1 Scope
IEC 63241-1:2023, Clause 1 is applicable, except as follows:
Addition:
This part of IEC 63241 applies to hand-held concrete grinders and disc-type sanders.
2 Normative references
IEC 63241-1:2023, Clause 2 is applicable, except as follows:
Addition:
IEC 63241-1:2023, Electric motor-operated tools – Dust measurement procedure – Part 1:
General requirements
EN 1339:2003, Concrete paving flags – Requirements and test methods
EN 12859:2011, Gypsum blocks – Definitions, requirements and test methods
3 Terms and definitions
IEC 63241-1:2023, Clause 3 is applicable, except as follows:
Addition:
3.101
concrete grinder
tool intended for smoothing and deburring concrete surfaces by means of diamond wheels
3.102
disc-type sander
tool driving a rotating spindle on which a sanding accessory is mounted
4 Test procedure
IEC 63241-1:2023, Clause 4 is applicable, except as follows:
4.3 Operating conditions
Addition:
Concrete grinders are tested under load observing the conditions shown in Table 101.

– 6 – IEC 63241-2-3:2024 © IEC 2024
Table 101 – Operating conditions for concrete grinders
Material and set-up Concrete slabs with minimum dimensions of 400 mm × 400 mm, maximum dimensions of
600 mm × 600 mm and a thickness of (50 ± 5) mm in accordance with EN 1339:2003.
The concrete slabs shall be stored for at least three weeks under dry conditions. During
storing, the distance between the slabs shall be at least one slab thickness. The slabs
shall have the following specifications in accordance with the following subclauses of
EN 1339:2003:
Class 3 (5.3.3.2), Class 4 (5.3.4.2),
Class 70 (5.3.6.2) for 400 mm × 400 mm,
Class 45 (5.3.6.2) for 400 mm × 600 mm and 600 mm × 600 mm.
The slabs are placed on an A-support, see Figure 102, with 15° inclination and the lower
workpiece support being (500 ± 50) mm above the floor. The slabs are arranged without
gaps to achieve a plane area of approximately 2,0 m length and 1,2 m height, see
Figure 101.
For each tested machine, new slabs shall be used.
Orientation and The concrete slabs are ground. During grinding, the grinding wheel shall be at least
operation 50 mm away from the edges of the total area of the concrete slabs.
During grinding, the grinding area of the wheel shall be parallel to the surface of the
concrete slabs.
Tool bit/settings New or re-sharpened diamond wheel as specified by the manufacturer for grinding
concrete at the beginning of the first test. If necessary, the wheel can be changed during
a rest time.
Speed setting devices, if any, shall be adjusted to the setting specified for grinding
concrete.
Feed force The feed force applied to the tool shall be sufficient to ensure stable operation with good
performance.
Test During the entire test, a minimum of 1 200 g of material shall be collected in the dust
extraction unit.
The weight of the material collected may be determined as the weight increase of the
dust extraction unit by means of scales.

Disc-type sanders intended to process mineral materials are tested under load observing the
conditions shown in Table 102.

Table 102 – Operating conditions for disc-type sanders when sanding gypsum blocks
Material and set-up Gypsum blocks made of 100 % calcium sulfate dihydrate (CaSO 2H O) with a density of
4 2
minimum 1 250 kg/m (high density, designation as D – dense) and a minimum hardness
of 80 Shore C units in accordance with EN 12859:2011. The gypsum blocks shall be
stored in a dry environment for at least 2 weeks prior to testing, with a distance of at
least one block thickness between each of them.
Gypsum blocks with suitable dimensions and a thickness of approximately 100 mm are
placed on an A-support, see Figure 102, with 15° inclination and the lower workpiece
support being (500 ± 50) mm above the floor. The blocks are arranged without gaps to
achieve an area of approximately 4 m length and 1,5 m height, see Figure 103.
For each tested tool, new gypsum blocks shall be used and replaced when either
– the gypsum blocks are sanded down to the surface of the supporting plate; or
– the gypsum blocks are broken; or
– pieces of the gypsum blocks are thrown out.
Orientation and The gypsum blocks are sanded. During sanding, the sanding paper shall be at least
operation 50 mm away from the edges of the total block area.
During sanding, the sanding paper shall be parallel to the surface of the gypsum block.
Tool bit/settings Sanding paper or grinding grid with a grain P80, suitable for the material gypsum. The
sanding paper is replaced after each test cycle.
Speed setting devices, if any, shall be adjusted to maximum speed.
Feed force The feed force applied to the tool shall be sufficient to ensure stable operation with good
performance.
Test During the entire test a minimum of
– 1 500 g, for disc-type sanders with a rated capacity up to and including 150 mm; or
– 2 000 g, for disc-type sanders with a rated capacity above 150 mm
material shall be collected in the dust extraction unit.
The weight of the material collected may be determined as the weight increase of the
dust extraction unit by means of scales.

Disc-type sanders with sanding paper intended for sanding wood are tested under load
observing the conditions shown in Table 103.
Table 103 – Operating conditions for disc-type sanders when sanding wood
Material and set-up Beech wood, (500 ± 2) mm length, (500 ± 2) mm width, with a thickness sufficient for
three complete tests.
At the beginning of the test, the wood shall have a humidity not exceeding 12 %. The
workpiece is mounted horizontally on a bench with a working height matching the
requirement for the vertical distance between the upper surface of the workpiece and the
intake openings of the dust samplers as specified in IEC 63241-1:2023, 4.2.
Orientation and Uniform sanding of the complete surface.
operation
Sanding paper with a grain P80, suitable for beech. The sanding paper is replaced after
Tool bit/settings
each test cycle.
Speed setting devices, if any, shall be adjusted to maximum speed.
Feed force (30 ± 5) N, if the mass of the tool is less than 1,5 kg; or
(50 ± 5) N, if the mass of the tool is greater than or equal to 1,5 kg.
Test Uniform sanding during working time.
If disc-type sanders with integral dust extraction units are used, the dust container
shall be changed on one-way systems or emptied on multiple-use systems dependent on
its capacity, but at the latest after the third test cycle of each test. The emptying of
multiple-use dust extraction units shall be done in the test room, in accordance with the
manufacturer's instructions.
– 8 – IEC 63241-2-3:2024 © IEC 2024
Disc-type sanders with sanding paper intended for sanding wooden floors are tested under
load observing the conditions shown in Table 104.
Table 104 – Operating conditions for disc-type sanders when sanding wooden floors
Material and set-up Oak (strip parquet) on the floor of the test room: approximately 3 000 mm × 2 000 mm,
thickness sufficient for three complete tests.
Parquet surface pre-sanded, oak wood with a humidity not exceeding 12 %.
Disc-type sanders intended for sanding along a wall: a three-sided moveable frame,
(300 ± 2) mm high, size approximately 2 000 mm × 1 000 mm is prepared and used.
Orientation and Disc-type sanders intended for surface sanding: uniform sanding of the complete
operation working area by constant moving of the tool with a speed of 20 m/min to 25 m/min.
Disc-type sanders intended for sanding along a wall: uniform sanding along the
complete border (back and forth movement). The frame is moved after each test cycle to
another area on the parquet to avoid excessive wear.
Tool bit/settings Aluminium oxide sanding paper with a g
...