IEC 62841-2-9:2015
(Main)Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-9: Particular requirements for hand-held tappers and threaders
Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 2-9: Particular requirements for hand-held tappers and threaders
IEC 62841-2-9:2015 applies to hand-held tappers and threaders. 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. The rated input is not more than 3 700 W. The limits for the applicability of this standard for battery tools is given in Annex K. This standard deals with the hazards presented by tools which are encountered by all persons in the normal use and reasonably foreseeable misuse of the tools. Hand-held electric tools, which can be mounted on a support or working stand for use as fixed tools without any alteration of the tool itself, are within the scope of this standard and such combination of a hand-held tool and a support is considered to be a transportable tool and thus covered by the relevant Part 3. 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. Key words: Tapper, Threader, Internal Screw Threads, External Screw Threads
This publication is to be read in conjunction with IEC 62841-1:2014. The contents of the corrigendum of October 2015 have been included in this copy.
Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 2-9: Exigences particulières pour les taraudeuses et les fileteuses portatives
L'IEC 62841-2-9:2015 s'applique aux taraudeuses et les fileteuses portatives. La tension assignée est inférieure à 250 V pour les outils à courant monophasé alternatif ou continu, et inférieure à 480 V pour les outils à courant alternatif triphasé. La tension assignée est inférieure à 3 700 W. Les limites d'application de la présente Norme aux outils fonctionnant sur batterie sont indiquées en Annex K. La présente Norme traite des dangers présentés par les outils, encourus par tous les individus dans l'utilisation normale et dans l'utilisation impropre raisonnablement prévisible de ces outils. Les outils électroportatifs, qui peuvent être montés sur un support de travail pour être utilisés comme outils installés à poste fixe sans aucune modification de l'outil lui-même, sont compris dans le domaine d'application de la présente Norme et la combinaison d'un outil portatif et d'un support est considérée comme un outil portable, donc couvert par la Partie 3 applicable. L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication IEC, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 36 mois après la date de publication. Mots-clés: taraudeuse, fileteuse, filetages internes, filetages externes
Cette publication doit être lue conjointement avec la CEI 62841-1:2014. Le contenu du corrigendum d'octobre 2015 a été pris en considération dans cet exemplaire.
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IEC 62841-2-9 ®
Edition 1.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-9: Particular requirements for hand-held tappers and threaders
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 62841-2-9 ®
Edition 1.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-9: Particular requirements for hand-held tappers and threaders
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.140.20 ISBN 978-2-8327-0249-9
REDLINE VERSION – 2 – IEC 62841-2-9:2015+AMD1:2025 CSV
© IEC 2025
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 General conditions for the tests . 6
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 . 9
19 Mechanical hazards . 10
20 Mechanical strength . 10
21 Construction . 11
22 Internal wiring . 11
23 Components . 11
24 Supply connection and external flexible cords . 11
25 Terminals for external conductors . 11
26 Provision for earthing . 12
27 Screws and connections . 12
28 Creepage distances, clearances and distances through insulation . 12
Annexes . 14
Annex I (informative) Measurement of noise and vibration emissions . 14
Annex K (normative) Battery tools and battery packs . 17
Bibliography . 18
Figure 101 – Threader with support device . 12
Figure 102 – Set-up for testing the support device . 13
Figure I.101 – Position of transducers for tappers . 15
Figure I.102 – Position of transducers for threaders . 16
Table 101 – Load torque . 9
Table 4 – Required performance levels . 10
Table I.101 – Operating conditions for tappers and threaders . 15
© IEC 2025
Table 4 – Required performance levels . 17
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© IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 2-9: Particular requirements for hand-held tappers and threaders
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62841-2-9 edition 1.1 contains the first edition (2015-01) [documents 116/199/FDIS
and 116/212/RVD], its corrigendum 1 (2015-10) and its amendment 1 (2025-02)
[documents 116/861/FDIS and 116/876/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 2025
International Standard IEC 62841-2-9 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 2-9 is to be used in conjunction with the first edition of IEC 62841-1 (2014).
This Part 2-9 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held tappers and threaders.
Where a particular subclause of Part 1 is not mentioned in this Part 2-9, 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 document and its amendment will remain
unchanged until the stability date indicated on the IEC website under webstore.iec.ch in the
data related to the specific document. At this date, the document will be
econfirmed,
• r
• 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.
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© IEC 2025
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 2-9: Particular requirements for hand-held tappers and threaders
1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This standard applies to hand-held tappers and threaders.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads – Part 1:
Dimensions, tolerances and designation
ISO 65:1981, Carbon steel tubes suitable for screwing in accordance with ISO 7-1
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
tapper
tool intended for cutting internal screw threads
3.102
threader
tool intended for cutting external threads
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:
© IEC 2025
5.17 Addition:
The mass of a tapper/threader includes the auxiliary handle, if any. Any support device as
illustrated in Figure 101 for a threader is not regarded as part 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:
8.1 Addition:
In addition the tool shall have the following marking:
− maximum diameter, in millimetres (for tappers) or in inches (for threaders), of the thread
which can be cut.
NOTE According to the International System of Units, only SI units should be used. Nevertheless, some pipe
diameters and threads are still specified in inches internationally.
For tappers, the diameter shall refer to a unified ISO thread to be cut into steel having a
tensile strength of 390 N/mm and a thickness of twice the thread diameter, unless
otherwise indicated on the tool.
For threaders, the diameter shall refer to a taper style thread in accordance with ISO 7-1 to
be cut on steel tubes in accordance with ISO 65, unless otherwise indicated on the tool.
8.14.1 Addition:
For threaders, 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 Threader safety warnings
a) Always use the support device provided with the tool. Loss of control during operation
can result in personal injury.
b) Keep sleeves and jackets buttoned while operating the tool. Do not reach across the
tool or pipe. Clothing can be caught by the pipe or the tool resulting in entanglement.
c) Only one person must control the work process and tool operation. Additional people
involved in the process may result in unintended operation and personal injury.
d) Keep floors dry and free of slippery materials such as oil. Slippery floors invite
accidents.
8.14.2 a) Addition:
101) for threaders: instructions for mounting and use of the support device.
8.14.2 b) Addition:
101) for threaders: instructions to always use the support device supplied with the tool;
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© IEC 2025
102) for threaders with multiple gear box settings: information about which gear box setting
is to be used for each pipe diameter.
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, except as follows:
Modification:
For threaders, the requirements of this clause are replaced by the following:
The rated input or rated current shall be at least 100 % of the measured input or current
applying the torque in Table 101.
Compliance is checked by measuring the power input or current of the tool when stabilized
while all circuits which can operate simultaneously are in operation.
For tools marked with one or more rated voltages, the test is made at each of the rated
voltages. For tools marked with one or more rated voltage ranges, the test is made at both
the upper and lower limits of the ranges. For tools with multiple gear box settings, the test is
made at each specified gear box setting in accordance with 8.14.2 b). The highest value of
input or current is applicable.
12 Heating
This clause of Part 1 is applicable, except as follows:
12.2.1 Replacement:
Tappers are 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 being loaded during the periods of
operation by means of a brake adjusted so as to attain rated input or rated current. The
temperature rises are measured at the end of the last “on” period.
Threaders are operated for 30 s at load followed by 30 s no load and then switched off for a
rest period of 60 s. This cycle is continued until thermal equilibrium is reached, or for
30 cycles, whichever is achieved first. The tool is loaded during the periods of operation by
means of a brake adjusted to attain the torque specified in Table 101. The brake load may be
ramped up to the specified torque over a period of time not to exceed 5 s. This ramp up time
is added to the 30 s cycle at load. The temperature rises are measured at the end of the last
load period.
The above test cycle may, at the manufacturer’s option, be replaced by continuous operation
of the tool until thermal equilibrium is reached.
© IEC 2025
NOTE Continuous operation is not typical for these tools and is regarded as a more severe test. Therefore, this is
an option for the cycle test in order to simplify the testing.
Table 101 – Load torque
Maximum diameter of thread Torque
inch Nm
1 125
1,25 150
1,5 160
2 180
12.5 Addition:
For threaders, the temperature-rise limit specified for the external enclosure does not apply
to the enclosure of the gear box. However, the above exemption does not apply to handles
adjacent to the gear box.
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.
18 Abnormal operation
This clause of Part 1 is applicable, except as follows:
18.8 Replacement of Table 4:
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© IEC 2025
Table 4 – Required performance levels
Type and purpose of SCF Minimum performance level
(PL)
Power switch – prevent unwanted switch-on for tappers a
Power switch – prevent unwanted switch-on for threaders a
Power switch – provide desired switch-off for tappers b
Power switch – provide desired switch-off for threaders c
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 18.4 and 18.5.3 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.
20.101 The device to support the threader shall withstand the torque output generated by
the tool while cutting a thread in either direction.
Compliance is checked by the following test:
The tool is set with the largest die head in accordance with 8.1 on to a pipe as specified in
8.1. The point of contact with the support device and tool is determined. The support device is
mounted in accordance with 8.14.2 a) so there is an 8 mm minimum clearance between the
device and the point of contact. See Figure 102.
A thread is cut until one of the following occurs:
– the tool stalls;
– the thread is destroyed allowing the die head to continue rotating;
– the die head stops rotating due to failure of the tool or by means of a mechanical or
electrical/electronic device.
As a result of the test, none of the following shall occur:
– ejection of parts from the tool or from the die head;
– rotation of the support device exceeding 30° or lateral movement exceeding 25 mm;
– cracked or broken parts of the support device, however bending is allowed.
© IEC 2025
21 Construction
This clause of Part 1 is applicable, except as follows:
21.18.1.1 Addition:
Threaders are regarded as tools with a risk associated with continued locked-on operation.
21.18.1.2 This subclause is not applicable.
21.30 This subclause is not applicable.
21.32 This subclause is not applicable.
21.35 This subclause is not applicable.
21.101 Threaders shall be supplied with a device to support the tool while cutting a thread.
Figure 101 shows an example of a threader with a support device.
Compliance is checked by inspection.
22 Internal wiring
This clause of Part 1 is applicable.
23 Components
This clause of Part 1 is applicable, except as follows:
23.1.10.2 Modification:
Power switches for threaders are tested for 10 000 cycles.
23.3 This subclause is not applicable.
24 Supply connection and external flexible cords
This clause of Part 1 is applicable, except as follows:
24.4 Addition:
If rubber insulated cables are used, they shall be polychloroprene or other equivalent
synthetic elastomer sheathed cables (code designation 60245 IEC 57 or 60245 IEC 66).
25 Terminals for external conductors
This clause of Part 1 is applicable.
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© IEC 2025
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.
IEC
Key
1 pipe
2 support device
3 threader
Figure 101 – Threader with support device
© IEC 2025
IEC
Key
d , d , d distance between support device and point of contact, depending on design of the tool
1 2 3
1 pipe
2 support device
3 threader
Figure 102 – Set-up for testing the support device
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© IEC 2025
Annexes
The annexes of Part 1 are applicable except as follows.
Annex I
(informative)
Measurement of noise and vibration emissions
NOTE In Europe (EN 62841-2-9), 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:
Tappers and threaders are suspended. The main axis of the tool shall be horizontal.
I.2.5 Operating conditions
Addition:
Tappers and threaders are tested at no-load.
The temperature requirements of 5.6 are not applicable.
I.3 Vibration
This clause of Part 1 is applicable except as follows:
I.3.3.2 Location of measurement
Addition:
Figure I.101 shows the positions for tappers. Figure I.102 shows the positions for threaders.
I.3.5.1 General
Addition:
For battery operated tools, the tests are conducted with the lightest battery in accordance
with K.8.14.2 e) 2) of Part 1 that has sufficient capacity to operate the tool at no-load for at
least 25 min.
I.3.5.3 Operating conditions
Addition:
Tappers and threaders are tested observing the conditions shown in Table I.101.
© IEC 2025
Table I.101 – Operating conditions for tappers and threaders
Orientation Tappers and threaders are tested at no-load.
The tapper is held vertically during the test. The threader is held 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 1 As it is difficult to measure load applications of tappers and threaders in laboratories and results have
shown that the load has no influence on the vibration results, no-load has been chosen as operating condition.
NOTE 2 For threaders, the handle adjacent to the gear box is needed to achieve a horizontal position, however
it is not used during actual operation.
I.3.6.2 Declaration of the vibration total value
Addition:
The vibration total value a of the handle wi
...
IEC 62841-2-9 ®
Edition 1.0 2015-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-9: Particular requirements for hand-held tappers and threaders
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-9: Exigences particulières pour les taraudeuses et les fileteuses
portatives
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International Standards for all electrical, electronic and related technologies.
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IEC 62841-2-9 ®
Edition 1.0 2015-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 2-9: Particular requirements for hand-held tappers and threaders
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 2-9: Exigences particulières pour les taraudeuses et les fileteuses
portatives
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20 ISBN 978-2-8322-2185-3
– 2 – IEC 62841-2-9:2015 © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 General conditions for the tests . 6
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 . 9
19 Mechanical hazards . 10
20 Mechanical strength . 10
21 Construction . 11
22 Internal wiring . 11
23 Components . 11
24 Supply connection and external flexible cords . 11
25 Terminals for external conductors . 11
26 Provision for earthing . 11
27 Screws and connections . 11
28 Creepage distances, clearances and distances through insulation . 12
Annexes . 14
Annex I (informative) Measurement of noise and vibration emissions . 14
Annex K (normative) Battery tools and battery packs . 17
Bibliography . 18
Figure 101 – Threader with support device . 12
Figure 102 – Set-up for testing the support device . 13
Figure I.101 – Position of transducers for tappers . 15
Figure I.102 – Position of transducers for threaders . 16
Table 101 – Load torque . 9
Table 4 – Required performance levels . 10
Table I.101 – Operating conditions for tappers and threaders . 15
Table 4 – Required performance levels . 17
– 4 – IEC 62841-2-9:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 2-9: Particular requirements for hand-held tappers and threaders
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62841-2-9 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
116/199/FDIS 116/212/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.
This Part 2-9 is to be used in conjunction with the first edition of IEC 62841-1 (2014).
This Part 2-9 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for hand-held tappers and threaders.
Where a particular subclause of Part 1 is not mentioned in this Part 2-9, 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.
– 6 – IEC 62841-2-9:2015 © IEC 2015
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 2-9: Particular requirements for hand-held tappers and threaders
1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This standard applies to hand-held tappers and threaders.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads – Part 1:
Dimensions, tolerances and designation
ISO 65:1981, Carbon steel tubes suitable for screwing in accordance with ISO 7-1
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
tapper
tool intended for cutting internal screw threads
3.102
threader
tool intended for cutting external threads
4 General requirements
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows:
5.17 Addition:
The mass of a tapper/threader includes the auxiliary handle, if any. Any support device as
illustrated in Figure 101 for a threader is not regarded as part 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:
8.1 Addition:
In addition the tool shall have the following marking:
− maximum diameter, in millimetres (for tappers) or in inches (for threaders), of the thread
which can be cut.
NOTE According to the International System of Units, only SI units should be used. Nevertheless, some pipe
diameters and threads are still specified in inches internationally.
For tappers, the diameter shall refer to a unified ISO thread to be cut into steel having a
tensile strength of 390 N/mm and a thickness of twice the thread diameter, unless
otherwise indicated on the tool.
For threaders, the diameter shall refer to a taper style thread in accordance with ISO 7-1 to
be cut on steel tubes in accordance with ISO 65, unless otherwise indicated on the tool.
8.14.1 Addition:
For threaders, 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 Threader safety warnings
a) Always use the support device provided with the tool. Loss of control during operation
can result in personal injury.
b) Keep sleeves and jackets buttoned while operating the tool. Do not reach across the
tool or pipe. Clothing can be caught by the pipe or the tool resulting in entanglement.
c) Only one person must control the work process and tool operation. Additional people
involved in the process may result in unintended operation and personal injury.
d) Keep floors dry and free of slippery materials such as oil. Slippery floors invite
accidents.
8.14.2 a) Addition:
101) for threaders: instructions for mounting and use of the support device.
8.14.2 b) Addition:
101) for threaders: instructions to always use the support device supplied with the tool;
– 8 – IEC 62841-2-9:2015 © IEC 2015
102) for threaders with multiple gear box settings: information about which gear box setting
is to be used for each pipe diameter.
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, except as follows:
Modification:
For threaders, the requirements of this clause are replaced by the following:
The rated input or rated current shall be at least 100 % of the measured input or current
applying the torque in Table 101.
Compliance is checked by measuring the power input or current of the tool when stabilized
while all circuits which can operate simultaneously are in operation.
For tools marked with one or more rated voltages, the test is made at each of the rated
voltages. For tools marked with one or more rated voltage ranges, the test is made at both
the upper and lower limits of the ranges. For tools with multiple gear box settings, the test is
made at each specified gear box setting in accordance with 8.14.2 b). The highest value of
input or current is applicable.
12 Heating
This clause of Part 1 is applicable, except as follows:
12.2.1 Replacement:
Tappers are 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 being loaded during the periods of
operation by means of a brake adjusted so as to attain rated input or rated current. The
temperature rises are measured at the end of the last “on” period.
Threaders are operated for 30 s at load followed by 30 s no load and then switched off for a
rest period of 60 s. This cycle is continued until thermal equilibrium is reached, or for
30 cycles, whichever is achieved first. The tool is loaded during the periods of operation by
means of a brake adjusted to attain the torque specified in Table 101. The brake load may be
ramped up to the specified torque over a period of time not to exceed 5 s. This ramp up time
is added to the 30 s cycle at load. The temperature rises are measured at the end of the last
load period.
The above test cycle may, at the manufacturer’s option, be replaced by continuous operation
of the tool until thermal equilibrium is reached.
NOTE Continuous operation is not typical for these tools and is regarded as a more severe test. Therefore, this is
an option for the cycle test in order to simplify the testing.
Table 101 – Load torque
Maximum diameter of thread Torque
inch Nm
1 125
1,25 150
1,5 160
2 180
12.5 Addition:
For threaders, the temperature-rise limit specified for the external enclosure does not apply
to the enclosure of the gear box. However, the above exemption does not apply to handles
adjacent to the gear box.
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.
18 Abnormal operation
This clause of Part 1 is applicable, except as follows:
18.8 Replacement of Table 4:
– 10 – IEC 62841-2-9:2015 © IEC 2015
Table 4 – Required performance levels
Type and purpose of SCF Minimum performance level
(PL)
Power switch – prevent unwanted switch-on for tappers a
Power switch – prevent unwanted switch-on for threaders a
Power switch – provide desired switch-off for tappers b
Power switch – provide desired switch-off for threaders c
Not an SCF
Provide desired direction of rotation
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.
20.101 The device to support the threader shall withstand the torque output generated by
the tool while cutting a thread in either direction.
Compliance is checked by the following test:
The tool is set with the largest die head in accordance with 8.1 on to a pipe as specified in
8.1. The point of contact with the support device and tool is determined. The support device is
mounted in accordance with 8.14.2 a) so there is an 8 mm minimum clearance between the
device and the point of contact. See Figure 102.
A thread is cut until one of the following occurs:
– the tool stalls;
– the thread is destroyed allowing the die head to continue rotating;
– the die head stops rotating due to failure of the tool or by means of a mechanical or
electrical/electronic device.
As a result of the test, none of the following shall occur:
– ejection of parts from the tool or from the die head;
– rotation of the support device exceeding 30° or lateral movement exceeding 25 mm;
– cracked or broken parts of the support device, however bending is allowed.
21 Construction
This clause of Part 1 is applicable, except as follows:
21.18.1.1 Addition:
Threaders are regarded as tools with a risk associated with continued locked-on operation.
21.32 This subclause is not applicable.
21.101 Threaders shall be supplied with a device to support the tool while cutting a thread.
Figure 101 shows an example of a threader with a support device.
Compliance is checked by inspection.
22 Internal wiring
This clause of Part 1 is applicable.
23 Components
This clause of Part 1 is applicable, except as follows:
23.1.10.2 Modification:
Power switches for threaders are tested for 10 000 cycles.
24 Supply connection and external flexible cords
This clause of Part 1 is applicable, except as follows:
24.4 Addition:
If rubber insulated cables are used, they shall be polychloroprene or other equivalent
synthetic elastomer sheathed cables (code designation 60245 IEC 57 or 60245 IEC 66).
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.
– 12 – IEC 62841-2-9:2015 © IEC 2015
28 Creepage distances, clearances and distances through insulation
This clause of Part 1 is applicable.
IEC
Key
1 pipe
2 support device
3 threader
Figure 101 – Threader with support device
IEC
Key
d , d , d distance between support device and point of contact, depending on design of the tool
1 2 3
1 pipe
2 support device
3 threader
Figure 102 – Set-up for testing the support device
– 14 – IEC 62841-2-9:2015 © IEC 2015
Annexes
The annexes of Part 1 are applicable except as follows.
Annex I
(informative)
Measurement of noise and vibration emissions
NOTE In Europe (EN 62841-2-9), 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:
Tappers and threaders are suspended. The main axis of the tool shall be horizontal.
I.2.5 Operating conditions
Addition:
Tappers and threaders are tested at no-load.
I.3 Vibration
This clause of Part 1 is applicable except as follows:
I.3.3.2 Location of measurement
Addition:
Figure I.101 shows the positions for tappers. Figure I.102 shows the positions for threaders.
I.3.5.3 Operating conditions
Addition:
Tappers and threaders are tested observing the conditions shown in Table I.101.
Table I.101 – Operating conditions for tappers and threaders
Orientation Tappers and threaders are tested at no-load.
The tapper is held vertically during the test. The threader is held 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 1 As it is difficult to measure load applications of tappers and threaders in laboratories and results have
shown that the load has no influence on the vibration results, no-load has been chosen as operating condition.
NOTE 2 For threaders, the handle adjacent to the gear box is needed to achieve a horizontal position, however
it is not used during actual operation.
I.3.6.2 Declaration of the vibration total value
Addition:
...
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