IEC 62841-2-2:2014

IEC 62841-2-2 ®
Edition 1.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-2: Particular requirements for hand-held screwdrivers and impact
wrenches
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-2: Règles particulières pour les visseuses et les clés à chocs portatives

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IEC 62841-2-2 ®
Edition 1.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety –
Part 2-2: Particular requirements for hand-held screwdrivers and impact

wrenches
Outils électroportatifs à moteur, outils portables et machines pour jardins et

pelouses – Sécurité –
Partie 2-2: Règles particulières pour les visseuses et les clés à chocs portatives

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX P
ICS 25.140.20 ISBN 978-2-8322-1520-3

– 2 – IEC 62841-2-2:2014 © IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 General conditions for the tests . 6
6 Radiation, toxicity and similar hazards . 6
7 Classification . 6
8 Marking and instructions . 6
9 Protection against access to live parts . 6
10 Starting . 6
11 Input and current . 6
12 Heating . 6
13 Resistance to heat and fire . 7
14 Moisture resistance . 7
15 Resistance to rusting . 7
16 Overload protection of transformers and associated circuits . 7
17 Endurance . 7
18 Abnormal operation . 8
19 Mechanical hazards . 8
20 Mechanical strength . 8
21 Construction . 9
22 Internal wiring . 9
23 Components . 9
24 Supply connection and external flexible cords . 9
25 Terminals for external conductors . 9
26 Provision for earthing . 9
27 Screws and connections . 9
28 Creepage distances, clearances and distances through insulation . 9
Annexes . 10
Annex I (informative) Measurement of noise and vibration emissions . 10
Annex K (normative) Battery tools and battery packs . 15
Bibliography . 16

Figure I.101 – Brake . 12
Figure I.102 – Position of transducer for screwdrivers . 12
Figure I.103 – Positions of transducers for impact wrenches . 13
Figure I.104 – Test fixture options for impact wrenches . 14

Table 4 – Required performance levels . 8
Table I.101 – Operating conditions for screwdrivers . 11
Table I.102 – Operating conditions for impact wrenches . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN
MACHINERY – SAFETY –
Part 2-2: Particular requirements for hand-held
screwdrivers and impact wrenches

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
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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
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6) All users should ensure that they have the latest edition of this publication.
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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 62841-2-2 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
The text of this standard is based on the following documents:
FDIS Report on voting
116/162/FDIS 116/177/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62841-2-2:2014 © IEC 2014
This Part 2-2 is to be used in conjunction with the first edition of IEC 62841-1:2014.
This Part 2-2 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held screwdrivers and
impact wrenches.
Where a particular subclause of Part 1 is not mentioned in this Part 2-2, that subclause
applies as far as reasonable. Where this standard states “addition”, “modification” or
“replacement”, the relevant text in Part 1 is to be adapted accordingly.
The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The terms defined in Clause 3 are printed in bold typeface.
Subclauses, notes and figures which are additional to those in Part 1 are numbered starting
from 101.
A list of all parts of the IEC 62841 series, under the general title: Electric motor-operated
hand-held tools, transportable tools and lawn and garden machinery – Safety, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 36 months from the date of publication
The contents of the corrigendum of October 2015 have been included in this copy.

ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN
MACHINERY – SAFETY –
Part 2-2: Particular requirements for hand-held
screwdrivers and impact wrenches

1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This part of IEC 62841 applies to screwdrivers and impact wrenches.
This standard does not apply to drills that can be used for driving screws by attaching
screwdriver bits.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
ISO 28927-2:2009, Hand-held portable power tools – Test methods for evaluation of vibration
emission – Part 2: Wrenches, nutrunners and screwdrivers
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Additional definitions:
3.101
screwdriver
tool equipped with a non-circular tool holder, such as hexagonal or square, intended for
tightening and loosening screws, nuts, and the like and not equipped with an impact
mechanism but which may have a device for depth setting or setting the torque or means for
switching off the rotation
3.102
impact wrench
tool equipped with a non-circular tool holder, such as hexagonal or square, intended for
tightening and loosening screws, nuts, and the like and equipped with a rotary impact
mechanism
Note 1 to entry: Some impact wrenches are equipped with a means for depth setting and may have a means for
setting the torque or switching off the rotation.

– 6 – IEC 62841-2-2:2014 © IEC 2014
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, if any.
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:
8.14.1.1 Addition:
101) Hold the power tool by insulated gripping surfaces, when performing an operation
where the fastener may contact hidden wiring or its own cord. Fasteners contacting
a "live" wire may make exposed metal parts of the power tool "live" and could give the
operator an electric shock.
NOTE The above safety warning applies only to screwdrivers and to impact wrenches with a square
drive less than 13 mm.
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.
The impact mechanism may be disabled during the test to prevent damage to the brake.
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 Modification:
For screwdrivers, the test of Part 1 is applicable.
For impact wrenches, replace the test of Part 1 as follows:
An impact wrench is operated with no-load for 12 h at a 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. If applicable, the tool
is adjusted to the maximum attainable speed.
The tool may be switched on and off by means of a switch other than that incorporated in the
tool.
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 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.

– 8 – IEC 62841-2-2:2014 © IEC 2014
After this, the impact wrenches are operated intermittently 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,
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.
Each cycle of operation comprises a tool impacting for a period of 1 s and a resting period of
9 s with the tool switched “off”, the “off” periods being included in the specified operating time.
During these tests, replacement of the carbon brushes is allowed, and the tool is oiled and
greased as in normal use. If mechanical failure occurs and does not impair compliance with
this standard, the part that failed may be replaced.
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.
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)
a
Power switch − prevent unwanted switch-on
Power switch − prevent unwanted switch-on for tools where the bit does not rotate Not an SCF
without applying axial pressure
a
Power switch − provide desired switch-off
Not an SCF
Power switch − provide desired switch-off for tools where the bit does not rotate
without applying axial pressure
Provide desired direction of rotation Not an SCF
Any electronic control to pass the test of 18.3 Not an SCF
Any speed limiting device Not an SCF
Prevent exceeding thermal limits as in Clause 18 a

19 Mechanical hazards
This clause of Part 1 is applicable, except as follows:
19.6 This subclause is not applicable.
20 Mechanical strength
This clause of Part 1 is applicable, except as follows:

20.5 This subclause is not applicable for impact wrenches with a square drive greater than
or equal to 13 mm.
21 Construction
This clause of Part 1 is applicable, except as follows:
21.30 This subclause is not applicable for impact wrenches with a square drive greater than
or equal to 13 mm.
22 Internal wiring
This clause of Part 1 is applicable.
23 Components
This clause of Part 1 is applicable.
24 Supply connection and external flexible cords
This clause of Part 1 is applicable, except as follows:
24.4 Replacement of paragraphs 1 and 2:
For impact wrenches, the lightest cable which can be used is heavy polychloroprene
sheathed flexible cable (60245 IEC 66) or equivalent.
25 Terminals for external conductors
This clause of Part 1 is applicable.
26 Provision for earthing
This clause of Part 1 is applicable.
27 Screws and connections
This clause of Part 1 is applicable.
28 Creepage distances, clearances and distances through insulation
This clause of Part 1 is applicable.

– 10 – IEC 62841-2-2:2014 © IEC 2014
Annexes
The annexes of Part 1 are applicable except as follows.

Annex I
(informative)
Measurement of noise and vibration emissions
NOTE In Europe (EN 62841-2-2), Annex I is normative.
I.2 Noise test code (grade 2)
This clause of Part 1 is applicable except as follows:
I.2.4 Installation and mounting conditions of the power tools during noise tests
Addition:
Screwdrivers are suspended. The bit holder shall be horizontal.
Impact wrenches are held and used as specified in I.2.5.
I.2.5 Operating conditions
Addition:
Screwdrivers are tested at no-load.
Impact wrenches are tested under load. The load is applied by means of a brake system, so
–1
that the socket driving the brake rotates at a test speed of (45 ± 5) min and the impact
mechanism is caused to operate continuously. The brake as shown in Figure I.101 is
supported on a resilient material and mounted on a bench such that the geometric centre of
the tool is 1 m above the reflecting plane. The details of the brake system are given in
Annex C of ISO 28927-2:2009.
To prevent chattering noise from items 2, 3 and 5 of the brake shown in Figures C.1 and C.2
of ISO 28927-2:2009, these parts may be insulated between each other by material such as
rubber.
The feed force shall be just sufficient to obtain a stable operation.
The measurement time shall be approximately 10 s.
I.3 Vibration
This clause of Part 1 is applicable except as follows:
I.3.3.2 Location of measurement
Addition:
Figures I.102 and I.103 show the positions for different screwdrivers and impact wrenches.

I.3.5.3 Operating conditions
Addition:
The operating conditions of Part 1 apply except those specified in Table I.101 and Table
I.102.
Table I.101 – Operating conditions for screwdrivers
Orientation Screwdrivers are tested at no-load.
The screwdriver is hold horizontally during the test.
Tool bit Tool bit of medium length and size.
Grip force Hold the machine with normal gripping force, avoiding excessive gripping force.
Test cycle One test cycle is given when the tool is switched on for no load at maximum speed for more than 10 s
and then switched off again.
The measurement is conducted during 10 s within this period.

NOTE As it is difficult to measure load applications of screwdrivers in laboratories and results have shown that
the load has no influence on the vibration results, the measurements are conducted with no-load only.
Table I.102 – Operating conditions for impact wrenches
Orientation The tools are tested under load.
Either a hexagon head bolt is screwed into a nut or a hexagon nut is screwed onto a bolt using a
steel plate as part of a test fixture according to Figure I.104. The test fixture shall be either
mounted on the floor or on a concrete block at least the size of the test fixture with a minimum
thickness of 200 mm.
NOTE Figure I.104 shows an example for mounting the test fixture.
The bolts or nuts are of the biggest capacities of the tool under test. The screw case is a hard
joint with one steel washer under the head. The initial setting of the bolt or nut shall provide
10 mm of exposed length from the steel plate to provide the run up. The test fixture shall not turn
or move during the test.
The steel plate shall be long enough to accept 5 fixings with a clearance between each fixing of at
least the dimension of the head of the bolt or nut or a dimension distance which does not cause
interference with the adjacent fixing.
Tool bit Hex head sockets of the size and depth needed for the bolts or nuts defined above.
Feed force Provide sufficient grip and feed force to maintain safe control. Avoid excessive grip and feed
force.
Test cycle The test cycle will be one fixing for the specified bolt or nut for a period of run down and 5 s from
first impact (one test series contains five cycles).
The measurement starts from switch on of the tool with the socket / bit engaged with the bolts or
nuts to the end of 5 s of impact with continuous operation. This includes the time to cover run up
of 10 mm.
I.3.6.2 Declaration of the vibration total value
Addition:
The vibration total value a of the handle with the highest emission and the uncertainty K shall
h
be declared and:
– for screwdrivers
the work mode description “screw driving”;
– for impact wrenches
the work mode description “impact tightening of fastener
...