IEC 62841-2-6:2020
(Main)Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-6: Particular requirements for hand-held hammers
Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-6: Particular requirements for hand-held hammers
IEC 62841-2-6:2020 Tools covered by this document include percussion hammers and rotary hammers, including rotary hammers with the capability to rotate only with the percussion system disengaged (drill only mode).
The rated voltage is not more than 250 V for single-phase a.c. or d.c. tools, and 480 V for three-phase a.c. tools.
This document does not apply to drills and impact drills.
This document does not apply to tools that are designed exclusively for driving fasteners, such as palm nailers.
The content of the corrigendum 1 (2024-10) has been included in this copy.
Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 2-6 : Exigences particulières pour les marteaux portatifs
IEC 62841-2-6:2020 Les outils couverts par le présent document comprennent les marteaux de percussion et les marteaux rotatifs, y compris les marteaux rotatifs qui ne sont capables de tourner que lorsque le système de percussion est désactivé (mode forage uniquement).
La tension nominale n’est pas supérieure à 250 V pour les outils a.c. ou d.c. à une seule phase, et à 480 V pour les outils à trois phases a.c.
Le présent document ne s'applique pas aux perceuses ni aux perceuses à percussion.
Le présent document ne s'applique pas aux outils destinés exclusivement à la pose de fixations, comme les cloueuses portatives.
Le contenu du corrigendum 1 (2024-10) a été pris en considération dans cet exemplaire.
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IEC 62841-2-6 ®
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-6: Particular requirements for hand-held hammers
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-6: Exigences particulières pour les marteaux portatifs
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IEC 62841-2-6 ®
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-6: Particular requirements for hand-held hammers
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-6: Exigences particulières pour les marteaux portatifs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20 ISBN 978-2-8322-8611-1
– 2 – IEC 62841-2-6:2020 © IEC 2020
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 . 8
10 Starting . 8
11 Input and current . 8
12 Heating . 8
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 . 9
18 Abnormal operation . 12
19 Mechanical hazards . 13
20 Mechanical strength . 23
21 Construction . 23
22 Internal wiring . 24
23 Components . 24
24 Supply connection and external flexible cords . 25
25 Terminals for external conductors . 25
26 Provision for earthing . 25
27 Screws and connections . 25
28 Creepage distances, clearances and distances through insulation . 25
Annexes . 26
Annex I (informative) Measurement of noise and vibration emissions . 26
Annex K (normative) Battery tools and battery packs . 39
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 44
Annex AA (informative) Loading device . 46
Bibliography . 58
Figure 101 – Example of a testing apparatus . 11
Figure 102 – Reaction torque measurement of single handle tools (1) . 14
Figure 103 – Reaction torque measurement of single handle tools (2) . 15
Figure 104 – Reaction torque measurement of multi handle tools (1) . 16
Figure 105 – Reaction torque measurement of multi handle tools (2) . 17
Figure 106 – Locating point "S" on different power switch and handle designs . 18
Figure 107 – Locating point "F" on different flange designs . 19
Figure 108 – Measurement of length a for stick-type auxiliary handles without flange
used on rotary hammers that can also operate in percussion only mode . 20
Figure 109 – Example torque of a tool with a stable signal region . 22
Figure 110 – Example torque of a tool without a stable signal region . 22
Figure 111 – Example torque of a tool with an overload clutch . 23
Figure I.101 – Positions of microphones for the hemispherical measurement surface . 27
Figure I.102 – Test block and example of rebar configuration . 30
Figure I.103 – Testing device . 31
Figure I.104 – Application of load . 32
Figure I.105 – Positions of transducers for percussion hammers . 34
Figure I.106 – Positions of transducers for rotary hammers . 35
Figure AA.1 – Loading device . 47
Figure AA.2 – Details of the stamper SDS-Plus (size 40) . 48
Figure AA.3 – Details of the stamper SDS-Max (size 60) . 49
Figure AA.4 – Details of the stamper HEX 22 (size 60) . 50
Figure AA.5 – Details of the stamper HEX 28 (size 100) . 51
Figure AA.6 – Details of the stamper (generic) . 52
Figure AA.7 – Details of the bottom plate . 53
Figure AA.8 – Details of the cylinder . 54
Figure AA.9 – Details of the cover plate . 55
Figure AA.10 – Details of the flange . 56
Figure AA.11 – Details of the steel ball reaction plate . 57
Table 4 – Required performance levels . 12
Table I.101 – Coordinates of the six microphone positions . 27
Table I.102 – Noise test conditions for rotary hammers . 32
Table I.103 – Concrete specifications . 33
Table I.104 – Detailed example of a concrete formulation that fulfils the requirements
of Table I.103 . 33
Table I.105 – Drill bit size . 33
Table I.106 – Vibration test conditions for percussion hammers under load. 36
Table I.107 – Vibration test conditions for rotary hammers . 37
Table 4 – Required performance levels . 40
Table AA.1 – Loading device parameters . 46
– 4 – IEC 62841-2-6:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –
Part 2-6: Particular requirements for hand-held hammers
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,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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
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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 62841-2-6 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
116/459/FDIS 116/466/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This Part 2-6 is to be used in conjunction with IEC 62841-1:2014.
This Part 2-6 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held hammers.
Where a particular subclause of Part 1 is not mentioned in this Part 2-6, 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 in 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.
– 6 – IEC 62841-2-6:2020 © IEC 2020
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –
Part 2-6: Particular requirements for hand-held hammers
1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to hand-held hammers.
Tools covered by this document include percussion hammers and rotary hammers,
including rotary hammers with the capability to rotate only with the percussion system
disengaged (drill only mode).
This document does not apply to drills and impact drills.
NOTE 101 Drills and impact drills are covered by IEC 62841-2-1.
This document does not apply to tools that are designed exclusively for driving fasteners,
such as palm nailers.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
EN 206:2013, Concrete. Specification, performance, production and conformity
EN 206:2013/AMD1:2016
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
percussion hammer
tool equipped with a built-in percussion system where the impact energy is not dependent on
the feed force applied by the operator and has no capability of rotational motion
Note 1 to entry: Percussion hammers are also known as chisel hammers, hammers, breakers, concrete breakers
and picks.
3.102
rotary hammer
tool capable of rotational motion and equipped with a built-in percussion system where the
impact energy is not dependent on the feed force applied by the operator (rotary hammer
mode) and additionally, may have one or more of the following modes:
a) with rotational motion disengaged (percussion only mode)
b) with the percussion system disengaged (drill only mode)
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 the tool includes the auxiliary handle and all parts of an integrated (i.e. non-
detachable) dust extraction device, if any. A detachable dust extraction device is not included
in the mass of the tool.
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:
8.14.1 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 Hammer safety warnings
1) Safety instructions for all operations
a) Wear ear protectors. Exposure to noise can cause hearing loss.
b) Use auxiliary handle(s), if supplied with the tool. Loss of control can cause
personal injury.
c) Brace the tool properly before use. This tool produces a high output torque and
without properly bracing the tool during operation, loss of control may occur resulting
in personal injury.
NOTE 101 The above warning applies only for rotary hammers with a maximum output torque greater
than 100 Nm measured in accordance with 19.102.
d) Hold the power tool by insulated gripping surfaces, 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 102 For rotary hammers that can also be used as screwdrivers, the words "or fasteners" are
added after "cutting accessory".
– 8 – IEC 62841-2-6:2020 © IEC 2020
2) Safety instructions when using long drill bits with rotary hammers
NOTE 103 The warnings in this section apply only to rotary hammers.
a) Always start drilling at low speed and with the bit tip in contact with the
workpiece. At higher speeds, the bit is likely to bend if allowed to rotate freely without
contacting the workpiece, resulting in personal injury.
b) Apply pressure only in direct line with the bit and do not apply excessive
pressure. Bits can bend, causing breakage or loss of control, resulting in personal
injury.
8.14.2 a) Addition:
101) For tools with a maximum output torque greater than 100 Nm measured in accordance
with 19.102: instructions on how to brace the tool;
102) Instructions for assembling any attachments that are supplied with the tool;
103) For tools provided with a dust extraction device: instruction on how to collect the dust;
104) For tools with detachable dust collection device: information on which dust collection
device may be used.
9 Protection against access to live parts
This clause of Part 1 is applicable.
10 Starting
This clause of Part 1 is applicable.
11 Input and current
This clause of Part 1 is applicable.
12 Heating
This clause of Part 1 is applicable, except as follows:
12.2.1 Replacement:
The tool is operated intermittently for 30 cycles or until thermal equilibrium is reached,
whichever is achieved first, each cycle comprising a period of continuous operation of 30 s
and a rest period of 90 s with the tool switched off, the tool loaded during the periods of
operation by means of a brake adjusted so as to attain rated input or rated current.
During the test, the hammer mechanism is disengaged or removed.
12.5 Addition:
The temperature-rise limit specified for the external enclosure does not apply to the enclosure
of the impact mechanism.
13 Resistance to heat and fire
This clause of Part 1 is applicable.
14 Moisture resistance
This clause of Part 1 is applicable.
15 Resistance to rusting
This clause of Part 1 is applicable.
16 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
17 Endurance
This clause of Part 1 is applicable, except as follows:
17.2 Replacement:
Rotary hammers with drill only mode are operated intermittently at no-load with the impact
mechanism disengaged for 12 h at a supply voltage equal to 1,1 times the highest rated
voltage or 1,1 times the upper limit of the rated voltage range, and then for 12 h at a supply
voltage equal to 0,9 times the lowest rated voltage or 0,9 times the lower limit of the rated
voltage range. The 12 h of operation need not be continuous. The speed is adjusted to the
highest value of the highest range.
Each cycle of operation comprises an "on" period of 100 s and an "off" period of 20 s, the "off"
periods being included in the specified operating time.
During the test, the tool is placed in three different positions, the operating time, at each
voltage, being approximately 4 h for each position.
NOTE 1 The change of position is made to prevent abnormal accumulation of carbon dust in any particular place.
Examples of the three positions are horizontal, vertically up and vertically down.
Following the above test (if applicable), all hammers, including rotary hammers with drill only
mode, are mounted vertically down in a test apparatus designed to apply an axial force
ensuring steady operation of the impact mechanism to the hammer through a resilient
medium. An example of a test apparatus is shown in Figure 101.
The hammers are then operated at rated voltage, for four periods of 6 h each, the interval
between these periods being at least 30 min. For rotary hammers with drill only mode, the
impact mechanism is engaged.
– 10 – IEC 62841-2-6:2020 © IEC 2020
The tool is operated intermittently, each cycle comprising a period of operation of 30 s and a
rest period of 90 s during which the tool remains switched off.
The tool may be switched on and off by means of a switch other than that incorporated in the
tool.
During these tests, replacement of the carbon brushes is allowed, and the tool is oiled and
greased as in normal use. If the impact mechanism fails mechanically during the test without
causing an accessible part to become live, it may be replaced by a new one.
If the temperature rise of any part of the tool exceeds the temperature rise determined during
the test of 12.1, forced cooling or rest periods may be applied, the rest periods being
excluded from the specified operating time. If forced cooling is applied, it shall not alter the air
flow of the tool or redistribute carbon deposits.
During these tests, overload protection devices incorporated in the tool shall not activate.
NOTE 2 Monitoring of external temperatures will help avoid mechanical failures.
Dimensions in millimetres
Key
1 resilient material to absorb vibration and prevent resonance
2 yoke, adapted to suit the grip of the tool
3 sample
4 mechanical or pneumatical springs applying a force to the sample
5 punch
6 hardened steel ball with diameter 38 mm
7 hardened steel transfer plate of mass M and diameter D
8 synthetic rubber disk or material having similar properties, Shore hardness 70° to 80°, thickness 6 mm to 7 mm,
fitting closely in cavity
9 steel base at mass M , with circular cavity having a diameter 1 mm greater than that of the transfer plate
10 ground support such as a concrete block being large and solid enough to ensure the stability of the test
apparatus during the test
D M M M
1 2 3
Rated input of tool Diameter of Mass
Minimum mass Total mass
transfer plate of transfer
of steel base of punch and
plate
shank
W mm kg kg kg
Up to and including 700
100 90 1,0 to 1,25 0,7
Over 700 up to and including 1 200 140 180 2,25 to 2,81 1,4
Over 1 200 up to and including 1 800 180 270 3,8 to 4,75 2,3
Over 1 800 up to and including 2 500 220 360 6,0 to 7,5 3,4
Figure 101 – Example of a testing apparatus
– 12 – IEC 62841-2-6:2020 © IEC 2020
18 Abnormal operation
This clause of Part 1 is applicable, except as follows:
18.8 Replacement of Table 4 by the following:
Table 4 – Required performance levels
Type and purpose of SCF Minimum performance level
(PL)
Power switch – provide desired switch-off for rotary hammers in rotary Shall be evaluated using the
hammer mode and drill only mode that require bracing in accordance with fault conditions of 18.6.1 without
8.14.1.101 the loss of this SCF
Power switch – provide desired switch off for percussion hammers or for Not an SCF
rotary hammers in percussion only mode
Provide desired direction of rotation for tools that do not require bracing in Not an SCF
accordance with 8.14.1.101
Provide desired direction of rotation for rotary hammers that require bracing c
in accordance with 8.14.1.101
Any electronic control to pass the test of 18.3 a
Any speed limiting device Not an SCF
Prevent exceeding thermal limits as in 18.4 a
Limit the torque to comply with 19.102 c
Power switch – prevent unwanted switch-on for rotary hammers in rotary a
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Power switch – prevent unwanted switch-on for rotary hammers in rotary b
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
Power switch – prevent unwanted switch-on for percussion hammers or
Not an SCF
for rotary hammers in percussion only mode
Power switch – provide desired switch-off for rotary hammers in rotary b
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Power switch – provide desired switch-off for rotary hammers in rotary c
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
Prevent unwanted lock-on of the power switch function for rotary hammers b
in rotary hammer mode and drill only mode with M ≤ 25 Nm in accordance
R
with 19.102
Prevent unwanted lock-on of the power switch function for rotary hammers c
in rotary hammer mode and drill only mode with M > 25 Nm in accordance
R
with 19.102
Prevent unwanted lock-on of the power switch function for percussion Not an SCF
hammers or for rotary hammers in percussion only mode
Prevent self-resetting as required in 23.3 for rotary hammers in rotary a
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Prevent self-resetting as required in 23.3 for rotary hammers in rotary b
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
19 Mechanical hazards
This clause of Part 1 is applicable, except as follows:
19.1 Addition:
The test with probe B of IEC 61032:1997 does not apply to the chuck and any accessory that
may be inserted.
19.6 This subclause of Part 1 is not applicable.
19.101 Chuck keys shall be so designed that they drop easily out of position when released.
This requirement does not exclude the provision of clips for holding the key in place when not
in use; metal clips fixed to the flexible cable or cord are not allowed.
Compliance is checked by inspection and manual test.
The key is inserted in the chuck and, without tightening, the tool is turned such that the key is
facing down. The key shall fall out within 2 s.
19.102 Handles on rotary hammers
19.102.1 General
The design of the handle(s) on rotary hammers shall be such that the operator can control
the static stalling torque during the operation of the tool. Depending on the handle design, the
stalling torque shall not exceed the relevant maximum values as indicated in Figures 102 to
105.
Figure 106 illustrates for various handle designs the location "S" where the operator naturally
grasps the power switch. For power switch designs without a natural grasping location, "S"
shall indicate the least favourable position on the power switch for the reactionary torque
measurement. This location "S" is used in Figure 102 to Figure 105 to determine the moment
arm for the torque calculation.
Figure 107 illustrates for various auxiliary handle with flange designs the location "F" where
the operator naturally grasps the handle at the flange. This location "F" is used in Figure 104
and Figure 105 to determine the moment arm for the torque calculation.
For rotary hammers with the ability to operate in percussion only mode and provided with a
stick-type auxiliary handle without flange, the determination of the relevant length "a" for the
moment arm is illustrated in Figure 108.
NOTE 101 Stick type auxiliary handles on rotary hammers that can operate in percussion only mode are typically
designed without a flange barrier. A flange could prevent ergonomic use in the chiselling application where the
flange would interfere with the hand of the operator. The measurement of "a" in Figure 108 accommodates this
type of tool.
Compliance is checked by the tests specified in 19.102.2 and 19.102.4 and by the
calculations in Figure 102 to Figure 105 and Figure 108.
– 14 – IEC 62841-2-6:2020 © IEC 2020
M = 400 N × a
R,max
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S" in
the direction of where the hand grasps the tool
a lever arm distance
M maximum reaction torque
R,max
Figure 102 – Reaction torque measurement of single handle tools (1)
Choose whichever is
greater:
M = 400 N × a
R,max 1
or
M = 400 N × a
R,max 2
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S" in
the direction of where the hand grasps the tool
a , a lever arm distances
1 2
M maximum reaction torque
R,max
Figure 103 – Reaction torque measurement of single handle tools (2)
– 16 – IEC 62841-2-6:2020 © IEC 2020
Choose whichever is
greatest:
M = 400 N × a
R,max 1
or
= 400 N × a
M
R,max 2
or
M = 400 N × a
R,max 3
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
F location of the hand on the flange where the operator naturally grasps
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S"
or "F" in the direction of where the hand grasps the tool
a , a , a lever arm distances
1 2 3
M maximum reaction torque
R,max
Figure 104 – Reaction torque measurement of multi handle tools (1)
Choose whichever is
greatest:
M = 400 N × a
R,max 1
or
M = 400 N × a
R,max 2
or
M = 400 N × a
R,max 3
or
M = 400 N × a
R,max 4
Key
the value of a or a is used only if the handle can be locked in position and is referenced for use
3 4
in 8.14.2 b) 6)
measure from a point on the centre line of the grasping surface that offers the greatest
mechanical advantage
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
F location of the hand on the flange where the operator naturally grasps
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from
"S" or "F" in the direction of where the hand grasps the tool
a , a , a , a lever arm distances
1 2 3 4
M maximum reaction torque
R,max
Figure 105 – Reaction torque measurement of multi handle tools (2)
– 18 – IEC 62841-2-6:2020 © IEC 2020
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least favourable
position on the power switch for the reactionary torque measurement
Figure 106 – Locating point "S" on different power switch and handle designs
Dimensions in millimetres
Key
1 flange
F location of the hand on the flange where the operator naturally grasps
d minor diameter
H height of the flange
Figure 107 – Locating point "F" on different flange designs
– 20 – IEC 62841-2-6:2020 © IEC 2020
Dimensions in metres
M = 400 N × a
R,max
Key
a lever arm distance
M maximum reaction torque
R,max
Figure 108 – Measurement of length a for stick-type auxiliary handles without flange
used on rotary hammers that can also operate in percussion only mode
19.102.2 Test equipment
The test equipment used for the test of 19.102.4 shall meet the following requirements a) to
g):
a) The torque transducer and the rotational angle sensor shall continuously monitor the
torque and the rotation produced by the output spindle of the tool during the test of
19.102.4.
b) The output of the torque transducer shall be connected to an oscilloscope or other data
acquisition equipment capable of displaying the torque versus time graph of the tool’s
output during the test of 19.102.4.
c) The torque transducer shall be rated to measure a torque of at least 150 % of the static
stalling torque of the tool or slip torque of an overload clutch (M ) with a measurement
R
accuracy of ±1 %.
d) The rotational angle shall be measured with an accuracy of ±2°.
e) The data acquisition equipment used for measuring the torque signal during the test shall
have a sampling rate of at least 15 kHz, but the bandwidth shall be limited by a first order
low pass filter with a cut-off frequency of (1 ± 0,1) kHz to minimise the effect of transients.
f) The joint that is connected to the tool during the test shall be capable of stalling the tool
over a rotational angle of 30° to 60°. The joint that fulfils this requirement shall be a
torsional element or other such device that remains in equilibrium during the test.
g) A regulated power supply that is connected to the tool during the test shall be capable of
providing the rated voltage and rated frequency provided on the tool’s nameplate (e.g.
120 V AC, 60 Hz). It shall also be suitably sized such that the voltage drop during the test
shall not deviate from the rated voltage or the upper limit of the rated voltage range by
more than 7 %.
Compliance is checked by inspection and by measurement.
19.102.3 Test to determine tool configuration
This test is only applicable for tools that employ (an) electronic circuit(s) that affect(s) the
output torque in the test of 19.102.4.
Prior to the test, any device or circuit that slows the rate of increase of the motor speed at
initial startup (e.g. soft start) is disabled.
Prior to each measurement, the sample is operated for at least 5 min at no-load. After each
5 min operation period, the measurement shall be conducted within 20 min.
All measurements are made with the tool sample running in the forward position.
The sample is connected to the measurement fixture and is fixed during the test.
The tool configuration for the test of 19.102.4 shall be either:
– when all functions affecting the output torque are considered SCFs and are evaluated
according to 18.8, all functions affecting the output torque are enabled; or
– when all functions affecting the output torque are not evaluated as SCFs according to
18.8, the configuration that results in the greatest output torque for one trial of the test of
19.102.4 through steps 1) and 2) as specified below:
• all functions affecting the output torque enabled; or
• each function affecting the output torque disabled one at a time.
19.102.4 Test procedure
If applicable, the sample is configured as specified in 19.102.3.
Prior to the test, any device or circuit that slows the rate of increase of the motor speed at
initial startup (e.g. soft start) is disabled.
Prior to the test, the sample is operated for at least 5 min at no-load. After the 5 min operation
period, the test shall be conducted within 20 min.
All measurements
...
IEC 62841-2-6 ®
Edition 1.1 2024-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-6: Particular requirements for hand-held hammers
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-6: Exigences particulières pour les marteaux portatifs
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IEC 62841-2-6 ®
Edition 1.1 2024-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-6: Particular requirements for hand-held hammers
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-6: Exigences particulières pour les marteaux portatifs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20 ISBN 978-2-8322-8344-8
IEC 62841-2-6 ®
Edition 1.1 2024-02
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-6: Particular requirements for hand-held hammers
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-6: Exigences particulières pour les marteaux portatifs
– 2 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
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 . 8
10 Starting . 8
11 Input and current . 8
12 Heating . 8
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 . 9
18 Abnormal operation . 12
19 Mechanical hazards . 13
20 Mechanical strength . 23
21 Construction . 24
22 Internal wiring . 25
23 Components . 25
24 Supply connection and external flexible cords . 25
25 Terminals for external conductors . 26
26 Provision for earthing . 26
27 Screws and connections . 26
28 Creepage distances, clearances and distances through insulation . 26
Annexes . 27
Annex I (informative) Measurement of noise and vibration emissions . 27
Annex K (normative) Battery tools and battery packs . 41
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 47
Annex AA (informative) Loading device . 49
Bibliography . 61
Figure 101 – Example of a testing apparatus . 11
Figure 102 – Reaction torque measurement of single handle tools (1) . 14
Figure 103 – Reaction torque measurement of single handle tools (2) . 15
Figure 104 – Reaction torque measurement of multi handle tools (1) . 16
Figure 105 – Reaction torque measurement of multi handle tools (2) . 17
© IEC 2024
Figure 106 – Locating point "S" on different power switch and handle designs . 18
Figure 107 – Locating point "F" on different flange designs . 19
Figure 108 – Measurement of length a for stick-type auxiliary handles without flange
used on rotary hammers that can also operate in percussion only mode . 20
Figure 109 – Example torque of a tool with a stable signal region . 22
Figure 110 – Example torque of a tool without a stable signal region . 23
Figure 111 – Example torque of a tool with an overload clutch . 23
Figure I.101 – Positions of microphones for the hemispherical measurement surface . 28
Figure I.102 – Test block and example of rebar configuration . 31
Figure I.103 – Testing device . 32
Figure I.104 – Application of load . 33
Figure I.105 – Positions of transducers for percussion hammers . 36
Figure I.106 – Positions of transducers for rotary hammers . 37
Figure AA.1 – Loading device . 50
Figure AA.2 – Details of the stamper SDS-Plus (size 40) . 51
Figure AA.3 – Details of the stamper SDS-Max (size 60) . 52
Figure AA.4 – Details of the stamper HEX 22 (size 60) . 53
Figure AA.5 – Details of the stamper HEX 28 (size 100) . 54
Figure AA.6 – Details of the stamper (generic) . 55
Figure AA.7 – Details of the bottom plate . 56
Figure AA.8 – Details of the cylinder . 57
Figure AA.9 – Details of the cover plate . 58
Figure AA.10 – Details of the flange . 59
Figure AA.11 – Details of the steel ball reaction plate . 60
Table 4 – Required performance levels . 12
Table I.101 – Coordinates of the six microphone positions . 28
Table I.102 – Noise test conditions for rotary hammers . 34
Table I.103 – Concrete specifications . 34
Table I.104 – Detailed example of a concrete formulation that fulfils the requirements
of Table I.103 . 34
Table I.105 – Drill bit size . 35
Table I.106 – Vibration test conditions for percussion hammers under load. 38
Table I.107 – Vibration test conditions for rotary hammers . 39
Table 4 – Required performance levels . 42
Table AA.1 – Loading device parameters . 49
– 4 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –
Part 2-6: Particular requirements for hand-held hammers
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-
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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
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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.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62841-2-6 edition 1.1 contains the first edition (2020-07) [documents 116/459/FDIS
and 116/466/RVD] and its amendment 1 (2024-02) [documents 116/691/FDIS and
116/732/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.
© IEC 2024
International Standard IEC 62841-2-6 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This Part 2-6 is to be used in conjunction with IEC 62841-1:2014.
This Part 2-6 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held hammers.
Where a particular subclause of Part 1 is not mentioned in this Part 2-6, 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 in 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 amendments 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 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.
– 6 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –
Part 2-6: Particular requirements for hand-held hammers
1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to hand-held hammers.
Tools covered by this document include percussion hammers and rotary hammers,
including rotary hammers with the capability to rotate only with the percussion system
disengaged (drill only mode).
This document does not apply to drills and impact drills.
NOTE 101 Drills and impact drills are covered by IEC 62841-2-1.
This document does not apply to tools that are designed exclusively for driving fasteners,
such as palm nailers.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
EN 206:2013, Concrete. Specification, performance, production and conformity
EN 206:2013/AMD1:2016AMD2:2021
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
percussion hammer
tool equipped with a built-in percussion system where the impact energy is not dependent on
the feed force applied by the operator and has no capability of rotational motion
Note 1 to entry: Percussion hammers are also known as chisel hammers, hammers, breakers, concrete breakers
and picks.
3.102
rotary hammer
tool capable of rotational motion and equipped with a built-in percussion system where the
impact energy is not dependent on the feed force applied by the operator (rotary hammer
mode) and additionally, may have one or more of the following modes:
© IEC 2024
a) with rotational motion disengaged (percussion only mode)
b) with the percussion system disengaged (drill only mode)
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 the tool includes the auxiliary handle and all parts of an integrated (i.e. non-
detachable) dust extraction device, if any. A detachable dust extraction device is not included
in the mass of the tool.
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:
8.14.1 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 Hammer safety warnings
1) Safety instructions for all operations
a) Wear ear protectors. Exposure to noise can cause hearing loss.
b) Use auxiliary handle(s), if supplied with the tool. Loss of control can cause
personal injury.
c) Brace the tool properly before use. This tool produces a high output torque and
without properly bracing the tool during operation, loss of control may occur resulting
in personal injury.
NOTE 101 The above warning applies only for rotary hammers with a maximum output torque greater
than 100 Nm measured in accordance with 19.102.
d) Hold the power tool by insulated gripping surfaces, 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 102 For rotary hammers that can also be used as screwdrivers, the words "or fasteners" are
added after "cutting accessory".
– 8 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
2) Safety instructions when using long drill bits with rotary hammers
NOTE 103 The warnings in this section apply only to rotary hammers.
a) Always start drilling at low speed and with the bit tip in contact with the
workpiece. At higher speeds, the bit is likely to bend if allowed to rotate freely without
contacting the workpiece, resulting in personal injury.
b) Apply pressure only in direct line with the bit and do not apply excessive
pressure. Bits can bend, causing breakage or loss of control, resulting in personal
injury.
8.14.2 a) Addition:
101) For tools with a maximum output torque greater than 100 Nm measured in accordance
with 19.102: instructions on how to brace the tool;
102) Instructions for assembling any attachments that are supplied with the tool;
103) For tools provided with a dust extraction device: instruction on how to collect the dust;
104) For tools with detachable dust collection device: information on which dust collection
device may be used.
9 Protection against access to live parts
This clause of Part 1 is applicable.
10 Starting
This clause of Part 1 is applicable.
11 Input and current
This clause of Part 1 is applicable.
12 Heating
This clause of Part 1 is applicable, except as follows:
12.2.1 Replacement:
The tool is operated intermittently for 30 cycles or until thermal equilibrium is reached,
whichever is achieved first, each cycle comprising a period of continuous operation of 30 s
and a rest period of 90 s with the tool switched off, the tool loaded during the periods of
operation by means of a brake adjusted so as to attain rated input or rated current.
During the test, the hammer mechanism is disengaged or removed.
12.5 Addition:
The temperature-rise limit specified for the external enclosure does not apply to the enclosure
of the impact mechanism.
© IEC 2024
13 Resistance to heat and fire
This clause of Part 1 is applicable.
14 Moisture resistance
This clause of Part 1 is applicable.
15 Resistance to rusting
This clause of Part 1 is applicable.
16 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
17 Endurance
This clause of Part 1 is applicable, except as follows:
17.2 Replacement:
Rotary hammers with drill only mode are operated intermittently at no-load with the impact
mechanism disengaged for 12 h at a supply voltage equal to 1,1 times the highest rated
voltage or 1,1 times the upper limit of the rated voltage range, and then for 12 h at a supply
voltage equal to 0,9 times the lowest rated voltage or 0,9 times the lower limit of the rated
voltage range. The 12 h of operation need not be continuous. The speed is adjusted to the
highest value of the highest range.
Each cycle of operation comprises an "on" period of 100 s and an "off" period of 20 s, the "off"
periods being included in the specified operating time.
During the test, the tool is placed in three different positions, the operating time, at each
voltage, being approximately 4 h for each position.
NOTE 1 The change of position is made to prevent abnormal accumulation of carbon dust in any particular place.
Examples of the three positions are horizontal, vertically up and vertically down.
Following the above test (if applicable), all hammers, including rotary hammers with drill only
mode, are mounted vertically down in a test apparatus designed to apply an axial force
ensuring steady operation of the impact mechanism to the hammer through a resilient
medium. An example of a test apparatus is shown in Figure 101.
The hammers are then operated at rated voltage, for four periods of 6 h each, the interval
between these periods being at least 30 min. For rotary hammers with drill only mode, the
impact mechanism is engaged.
– 10 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
The tool is operated intermittently, each cycle comprising a period of operation of 30 s and a
rest period of 90 s during which the tool remains switched off.
The tool may be switched on and off by means of a switch other than that incorporated in the
tool.
During these tests, replacement of the carbon brushes is allowed, and the tool is oiled and
greased as in normal use. If the impact mechanism fails mechanically during the test without
causing an accessible part to become live, it may be replaced by a new one.
If the temperature rise of any part of the tool exceeds the temperature rise determined during
the test of 12.1, forced cooling or rest periods may be applied, the rest periods being
excluded from the specified operating time. If forced cooling is applied, it shall not alter the air
flow of the tool or redistribute carbon deposits.
During these tests, overload protection devices incorporated in the tool shall not activate.
NOTE 2 Monitoring of external temperatures will help avoid mechanical failures.
© IEC 2024
Dimensions in millimetres
Key
1 resilient material to absorb vibration and prevent resonance
2 yoke, adapted to suit the grip of the tool
3 sample
4 mechanical or pneumatical springs applying a force to the sample
5 punch
6 hardened steel ball with diameter 38 mm
7 hardened steel transfer plate of mass M and diameter D
8 synthetic rubber disk or material having similar properties, Shore hardness 70° to 80°, thickness 6 mm to 7 mm,
fitting closely in cavity
9 steel base at mass M , with circular cavity having a diameter 1 mm greater than that of the transfer plate
10 ground support such as a concrete block being large and solid enough to ensure the stability of the test
apparatus during the test
D M M M
1 2 3
Rated input of tool Diameter of Mass
Minimum mass Total mass
transfer plate of transfer
of steel base of punch and
plate
shank
W mm kg kg kg
Up to and including 700
100 90 1,0 to 1,25 0,7
Over 700 up to and including 1 200 140 180 2,25 to 2,81 1,4
Over 1 200 up to and including 1 800 180 270 3,8 to 4,75 2,3
Over 1 800 up to and including 2 500 220 360 6,0 to 7,5 3,4
Figure 101 – Example of a testing apparatus
– 12 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
18 Abnormal operation
This clause of Part 1 is applicable, except as follows:
18.8 Replacement of Table 4 by the following:
Table 4 – Required performance levels
Type and purpose of SCF Minimum performance level
(PL)
Power switch – provide desired switch-off for rotary hammers in rotary Shall be evaluated using the
hammer mode and drill only mode that require bracing in accordance with fault conditions of 18.6.1 without
8.14.1.101 the loss of this SCF
Power switch – provide desired switch off for percussion hammers or for Not an SCF
rotary hammers in percussion only mode
Provide desired direction of rotation for tools that do not require bracing in Not an SCF
accordance with 8.14.1.101
Provide desired direction of rotation for rotary hammers that require bracing c
in accordance with 8.14.1.101
Any electronic control to pass the test of 18.3 a
Any speed limiting device Not an SCF
Prevent exceeding thermal limits as in 18.4 a
Limit the torque to comply with 19.102 c
Power switch – prevent unwanted switch-on for rotary hammers in rotary a
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Power switch – prevent unwanted switch-on for rotary hammers in rotary b
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
Power switch – prevent unwanted switch-on for percussion hammers or
Not an SCF
for rotary hammers in percussion only mode
Power switch – provide desired switch-off for rotary hammers in rotary b
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Power switch – provide desired switch-off for rotary hammers in rotary c
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
Prevent unwanted lock-on of the power switch function for rotary hammers b
in rotary hammer mode and drill only mode with M ≤ 25 Nm in accordance
R
with 19.102
Prevent unwanted lock-on of the power switch function for rotary hammers c
in rotary hammer mode and drill only mode with M > 25 Nm in accordance
R
with 19.102
Prevent unwanted lock-on of the power switch function for percussion Not an SCF
hammers or for rotary hammers in percussion only mode
Prevent self-resetting as required in 23.3 for rotary hammers in rotary a
hammer mode and drill only mode with M ≤ 25 Nm in accordance with
R
19.102
Prevent self-resetting as required in 23.3 for rotary hammers in rotary b
hammer mode and drill only mode with M > 25 Nm in accordance with
R
19.102
© IEC 2024
19 Mechanical hazards
This clause of Part 1 is applicable, except as follows:
19.1 Addition:
The test with probe B of IEC 61032:1997 does not apply to the chuck and any accessory that
may be inserted.
19.6 This subclause of Part 1 is not applicable.
19.101 Chuck keys shall be so designed that they drop easily out of position when released.
This requirement does not exclude the provision of clips for holding the key in place when not
in use; metal clips fixed to the flexible cable or cord are not allowed.
Compliance is checked by inspection and manual test.
The key is inserted in the chuck and, without tightening, the tool is turned such that the key is
facing down. The key shall fall out within 2 s.
19.102 Handles on rotary hammers
19.102.1 General
The design of the handle(s) on rotary hammers shall be such that the operator can control
the static stalling torque during the operation of the tool. Depending on the handle design, the
stalling torque shall not exceed the relevant maximum values as indicated in Figures 102 to
105.
Figure 106 illustrates for various handle designs the location "S" where the operator naturally
grasps the power switch. For power switch designs without a natural grasping location, "S"
shall indicate the least favourable position on the power switch for the reactionary torque
measurement. This location "S" is used in Figure 102 to Figure 105 to determine the moment
arm for the torque calculation.
Figure 107 illustrates for various auxiliary handle with flange designs the location "F" where
the operator naturally grasps the handle at the flange. This location "F" is used in Figure 104
and Figure 105 to determine the moment arm for the torque calculation.
For rotary hammers with the ability to operate in percussion only mode and provided with a
stick-type auxiliary handle without flange, the determination of the relevant length "a" for the
moment arm is illustrated in Figure 108.
NOTE 101 Stick type auxiliary handles on rotary hammers that can operate in percussion only mode are typically
designed without a flange barrier. A flange could prevent ergonomic use in the chiselling application where the
flange would interfere with the hand of the operator. The measurement of "a" in Figure 108 accommodates this
type of tool.
Compliance is checked by the tests specified in 19.102.2 and 19.102.4 and by the
calculations in Figure 102 to Figure 105 and Figure 108.
– 14 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
M = 400 N × a
R,max
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S" in
the direction of where the hand grasps the tool
a lever arm distance
M maximum reaction torque
R,max
Figure 102 – Reaction torque measurement of single handle tools (1)
© IEC 2024
Choose whichever is
greater:
M = 400 N × a
R,max 1
or
M = 400 N × a
R,max 2
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S" in
the direction of where the hand grasps the tool
a , a lever arm distances
1 2
M maximum reaction torque
R,max
Figure 103 – Reaction torque measurement of single handle tools (2)
– 16 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
Choose whichever is
greatest:
M = 400 N × a
R,max 1
or
= 400 N × a
M
R,max 2
or
M = 400 N × a
R,max 3
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
F location of the hand on the flange where the operator naturally grasps
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from "S"
or "F" in the direction of where the hand grasps the tool
a , a , a lever arm distances
1 2 3
M maximum reaction torque
R,max
Figure 104 – Reaction torque measurement of multi handle tools (1)
© IEC 2024
Choose whichever is
greatest:
M = 400 N × a
R,max 1
or
M = 400 N × a
R,max 2
or
M = 400 N × a
R,max 3
or
M = 400 N × a
R,max 4
Key
the value of a or a is used only if the handle can be locked in position and is referenced for use
3 4
in 8.14.2 b) 6)
measure from a point on the centre line of the grasping surface that offers the greatest
mechanical advantage
S location of the hand on the power switch where the operator naturally grasps and/or the least
favourable position on the power switch for the reactionary torque measurement
F location of the hand on the flange where the operator naturally grasps
x measurement point that is 80 mm or the remaining length of the handle, whichever is less, from
"S" or "F" in the direction of where the hand grasps the tool
a , a , a , a lever arm distances
1 2 3 4
M maximum reaction torque
R,max
Figure 105 – Reaction torque measurement of multi handle tools (2)
– 18 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
Key
S location of the hand on the power switch where the operator naturally grasps and/or the least favourable
position on the power switch for the reactionary torque measurement
Figure 106 – Locating point "S" on different power switch and handle designs
© IEC 2024
Dimensions in millimetres
Key
1 flange
F location of the hand on the flange where the operator naturally grasps
d minor diameter
H height of the flange
Figure 107 – Locating point "F" on different flange designs
– 20 – IEC 62841-2-6:2020+AMD1:2024 CSV
© IEC 2024
Dimensions in metres
M = 400 N × a
R,max
Key
a lever arm distance
M maximum reaction torque
R,max
Figure 108 – Measurement of length a for stick-type auxiliary handles without flange
used on rotary hammers that can also operate in percussion only mode
19.102.2 Test equipment
The test equipment used for the test of 19.102.4 shall meet the following requirements a) to
g):
a) The torque transducer and the rotational angle sensor shall continuously monitor the
torque and the rotation produced by the output spindle of the tool during the test of
19.102.4.
b) The output of the torque transducer shall be connected to an oscilloscope or other data
acquisition equipment capable of displaying the torque versus time graph of the tool’s
output during the test of 19.102.4.
c) The torque transducer shall be rated to measure a torque of at least 150 % of the static
stalling torque of the tool or slip torque of an overload clutch (M ) with a measurement
R
accuracy of ±1 %.
d) The rotational angle shall be measured with an accuracy of ±2°.
e) The data acquisition equipment used for measuring the torque signal during the test shall
have a sampling rate of at least 15 kHz, but the bandwidth shall be limited by a first order
low pass filter with a cut-off frequency of (1 ± 0,1) kHz to minimise the effect of transients.
f) The joint that is connected to the tool during the test shall be capable of stalling the tool
over a rotational angle of 30° to 60°. The joint that fulfils this requirement shall be a
torsional element or other such device that remains in equilibrium during the test.
g) A regulated power supply that is connected to the tool during the test shall be capable of
providing the rated voltage and rated frequency provided on the tool’s nameplate (e.g.
120 V AC, 60 Hz). It shall also be suitably sized such that the voltage drop during the test
shall not deviate from the rated voltage or the upper limit of the rated voltage range by
more than 7 %.
Compliance is checked by inspection and by measurement.
19.102.3 Test Assessment to determine tool configuration
This test assessment is only applicable for tools that employ (an) electronic circuit(s) that
affect(s) the output torque in the test of 19.102.4.
Prior to the test, any device or circuit that slows the rate of increase of the motor speed at
initial startup (e.g. soft start) is disabled.
© IEC 2024
Prior to each measurement, the sample is operated for at least 5 min at no-load. After each
5 min operation period, the measurement shall be conducted started within 20 min.
All measurements are made with the tool sample running in the forward position.
The sample is conne
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