prEN ISO 6789-1
(Main)Assembly tools for screws and nuts - Hand torque tools - Part 1: Requirements and methods for design conformance testing and quality conformance testing: minimum requirements for declaration of conformance (ISO/DIS 6789-1:2025)
Assembly tools for screws and nuts - Hand torque tools - Part 1: Requirements and methods for design conformance testing and quality conformance testing: minimum requirements for declaration of conformance (ISO/DIS 6789-1:2025)
This document specifies the conformance testing and marking requirements for hand torque tools used for controlled tightening of screws and nuts. It also specifies the minimum requirements for a manufacturer’s declaration of conformance for hand torque tools.
This document applies to hand torque tools which are classified as indicating torque tools (Type I) and setting torque tools (Type II).
NOTE Hand torque tools covered by this document are those identified in ISO 1703:2018 by reference numbers 7 1 00 01 0 to 7 1 00 14 0 inclusive. Torque limiting hand torque tools do not yet have reference numbers and will not do so until the next revision of ISO 1703
This document does not specify requirements of calibration certificates for hand torque tools. These are described in ISO 6789‑2.
This document does not specify requirements for verifying the performance of hand torque tools. These are described in ISO 6789-3.
Outils de manoeuvre pour vis et écrous - Outils dynamométriques à commande manuelle - Partie 1: Exigences et méthodes d'essai pour vérifier la conformité de conception et la conformité de qualité: exigences minimales pour déclaration de conformité (ISO/DIS 6789-1:2025)
ISO 6789-1:2017 spécifie les exigences d'essai de conformité et de marquage relatives aux outils dynamométriques à commande manuelle utilisés pour le serrage contrôlé de vis et écrous. Elle spécifie également les exigences minimales relatives à la déclaration de conformité des outils dynamométriques à commande manuelle.
ISO 6789-1:2017 s'applique aux outils dynamométriques à commande manuelle classés en tant qu'outils dynamométriques à lecture directe (Type I) et outils dynamométriques à déclenchement (Type II).
NOTE Les outils dynamométriques à commande manuelle couverts par le présent document sont ceux identifiés dans l'ISO 1703:2005 sous les numéros de référence 6 1 00 11 0, 6 1 00 11 1 et 6 1 00 12 0, 6 1 00 12 1 et 6 1 00 14 0, 6 1 00 15 0. L'ISO 1703 est en cours de révision. Dans la prochaine édition, les outils dynamométriques seront traités dans un article distinct, et du fait de cette modification, les numéros de référence changeront également et des numéros de référence supplémentaires seront ajoutés.
ISO 6789-1:2017 ne spécifie pas d'exigences relatives aux certificats d'étalonnage des outils dynamométriques à commande manuelle. Celles-ci sont décrites dans l'ISO 6789‑2.
Orodja za vijake in matice - Ročna vrtilna orodja - 1. del: Zahteve in metode za preskušanje skladnosti tipa in kakovosti: minimalne zahteve za izjavo o skladnosti (ISO/DIS 6789-1:2025)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2025
Orodja za vijake in matice - Ročna vrtilna orodja - 1. del: Zahteve in metode za
preskušanje skladnosti tipa in kakovosti: minimalne zahteve za izjavo o skladnosti
(ISO/DIS 6789-1:2025)
Assembly tools for screws and nuts - Hand torque tools - Part 1: Requirements and
methods for design conformance testing and quality conformance testing: minimum
requirements for declaration of conformance (ISO/DIS 6789-1:2025)
Outils de manoeuvre pour vis et écrous - Outils dynamométriques à commande
manuelle - Partie 1: Exigences et méthodes d'essai pour vérifier la conformité de
conception et la conformité de qualité: exigences minimales pour déclaration de
conformité (ISO/DIS 6789-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 6789-1
ICS:
25.140.30 Orodja za ročno uporabo Hand-operated tools
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 6789-1
ISO/TC 29/SC 10
Assembly tools for screws and
Secretariat: DIN
nuts — Hand torque tools —
Voting begins on:
Part 1: 2025-06-04
Requirements and methods for
Voting terminates on:
2025-08-27
design conformance testing and
quality conformance testing:
minimum requirements for
declaration of conformance
Outils de manoeuvre pour vis et écrous — Outils
dynamométriques à commande manuelle —
Partie 1: Exigences et méthodes d'essai pour vérifier la
conformité de conception et la conformité de qualité: exigences
minimales pour déclaration de conformité
ICS: 25.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
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STANDARDS MAY ON OCCASION HAVE TO
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BE CONSIDERED IN THE LIGHT OF THEIR
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RECIPIENTS OF THIS DRAFT ARE INVITED
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PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 6789-1:2025(en)
DRAFT
ISO/DIS 6789-1:2025(en)
International
Standard
ISO/DIS 6789-1
ISO/TC 29/SC 10
Assembly tools for screws and
Secretariat: DIN
nuts — Hand torque tools —
Voting begins on:
Part 1:
Requirements and methods for
Voting terminates on:
design conformance testing and
quality conformance testing:
minimum requirements for
declaration of conformance
Outils de manoeuvre pour vis et écrous — Outils
dynamométriques à commande manuelle —
Partie 1: Exigences et méthodes d'essai pour vérifier la
conformité de conception et la conformité de qualité: exigences
minimales pour déclaration de conformité
ICS: 25.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 6789-1:2025(en)
ii
ISO/DIS 6789-1:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions .1
3.2 Symbols, designations and units .3
4 Classification . 4
5 Requirements . 4
5.1 Design conformance testing .4
5.1.1 Maximum torque values .5
5.1.2 Specified torque range .5
5.1.3 Specified angle range .5
5.1.4 Scales, dials and displays for torque .6
5.1.5 Scales, dials and displays for angle .6
5.1.6 Maximum permissible torque error .6
5.1.7 Maximum permissible angle error .7
5.1.8 Overloading test .7
5.1.9 Endurance test .7
5.1.10 Effect of geometric changes.8
5.1.11 Effect of orientation with respect to ground .9
5.1.12 Influence of bending on angle measurement .9
5.2 Manufacturer’s Declaration of Conformance .9
6 Conformance with quality control requirements .10
7 Marking . .10
Annex A (normative) Examples of indicating torque tools (Type I) .11
Annex B (normative) Examples of setting torque tools (Type II) .13
Annex C (informative) Explanation of key changes in this edition of the standard with relation
to the performance of torque tools. .15
Annex D (informative) Example Manufacturer’s Declaration of Conformance. .18
Bibliography . 19
iii
ISO/DIS 6789-1:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly
tools for screws and nuts, pliers and nippers.
This second edition of ISO 6789-1, together with revisions of ISO 6789-2 and the addition of ISO 6789-3,
cancels and replaces ISO 6789-1:2017 and ISO6789-2:2017 which have been technically revised with changes
as follows. ISO 6789-1:2017 has been divided into two parts. The requirements for design and quality
control during manufacture as well as the manufacturer’s Declaration of Conformance are now solely aimed
at manufacturers and remain in ISO 6789-1. The minimum requirements for conformance verification of
tools during use are moved to the new ISO 6789-3.
Minimum requirements for calibration are still found in ISO 6789-2
iv
ISO/DIS 6789-1:2025(en)
Introduction
This revision has incorporated user feedback on the following general topics.
Clarifying for users of the standard which parts they should purchase to carry out their work related to
hand torque tools. (See below)
Achieving a significant reduction in the number of uncertainty measurements required to provide a
calibration certificate
Separating the declaration of conformance issued by a manufacturer from the performance report issued
by a test house or internal quality control function.
The calibration or verification of angle measurements found in a growing number of torque tools
The addition of tools that can be either indicating or setting according to the customer need.
The three parts of ISO 6789 that result from this revision can be summarised as follows:
ISO 6789-1 continues to provide designers and manufacturers with relevant minimum requirements for
the development and documentation of hand torque tools. The manufacturer may choose the level of doc-
umentation supplied with the tool according to the typical needs of the manufacturer’s customers. This
could be a ce
...
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