EN ISO 11806-1:2022

Agricultural and forestry machinery - Safety requirements and testing for portable, hand-held, powered brush-cutters and grass-trimmers - Part 1: Machines fitted with an integral combustion engine (ISO 11806-1:2022)

This document gives safety requirements and measures for their verification for the design and construction of portable hand-held, powered brush-cutters and grass-trimmers (hereafter called machines) having an integral combustion engine as their power unit and mechanical power transmission between the power source and the cutting attachment. Methods for the elimination or reduction of hazards arising from the use of these machines and the type of information on safe working practices to be provided by the manufacturer are specified.
This document deals with all significant hazards, hazardous situations and hazardous events relevant to these machines, as well as when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.
This document is not applicable to machines equipped with metallic cutting attachments consisting of more than one piece, such as pivoting chains or flail blades.
NOTE       See Annex C for a list of significant hazards.
This document is applicable to portable, hand-held, powered brush-cutters and grass-trimmers manufactured after its date of publication.

Land- und forstwirtschaftliche Maschinen - Sicherheitstechnische Anforderungen und Prüfung für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer - Teil 1: Maschinen mit Antrieb durch integrierten Verbrennungsmotor (ISO 11806-1:2022)

Dieses Dokument enthält sicherheitstechnische Anforderungen und Maßnahmen zu deren Überprüfung für die Gestaltung und Konstruktion von tragbaren, handgehaltenen, motorbetriebenen Freischneidern und Grastrimmern (nachfolgend Maschinen genannt), mit integriertem Verbrennungsmotor als Antriebseinheit und mechanischer Kraftübertragung zwischen Antriebsquelle und Schneidgarnitur. Verfahren für die Beseitigung oder Verringerung von Gefährdungen, die durch den Einsatz dieser Maschinen entstehen, sowie die Art der Informationen für sichere Arbeitsweisen, die vom Hersteller zur Verfügung zu stellen sind, werden festgelegt.
Dieses Dokument behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefährdungsereignisse, die für diese Maschinen relevant sind, sofern sie zu dem vorgesehenen Zweck und bei vernünftigerweise durch den Hersteller vorhersehbarem Missbrauch eingesetzt werden.
Dieses Dokument ist nicht anzuwenden für Maschinen, die mit mehrteiligen, metallischen Schneidwerkzeugen, wie beispielsweise schwenkbaren Ketten oder Schlegelmessern, ausgestattet sind.
ANMERKUNG   Siehe Anhang C zur Liste der signifikanten Gefährdungen.
Dieses Dokument ist anzuwenden für tragbare, handgehaltene, motorbetriebene Freischneider und Grastrimmer, die nach dessen Ausgabedatum hergestellt worden sind.

Matériel agricole et forestier - Exigences de sécurité et essais pour débroussailleuses et coupe-herbe portatifs à moteur - Partie 1: Machines équipées d'un moteur à combustion interne intégré (ISO 11806-1:2022)

Le présent document spécifie les exigences de sécurité et les mesures pour leur vérification, pour la conception et la construction des débroussailleuses et des coupe-herbe portatifs à moteur, tenus à la main, équipés d'un moteur à combustion interne intégré comme source motrice et d'une transmission mécanique de puissance entre la source motrice et le dispositif de coupe (appelées «machines» dans la suite du texte). Elle spécifie également des méthodes pour éliminer ou réduire les phénomènes dangereux inhérents à l'utilisation de ces machines, ainsi que le type d'informations sur les pratiques d'utilisation sûres à fournir par le fabricant.
Le présent document traite de tous les phénomènes dangereux significatifs, situations dangereuses ou événements dangereux pertinents pour ces machines, lorsqu'elles sont utilisées comme prévu et dans des conditions de mauvais usage raisonnablement prévisibles par le fabricant.
Le présent document n'est pas applicable aux machines équipées de dispositifs de coupe métallique composés de plus d'une pièce, par exemple des chaînes articulées ou des lames articulées.
NOTE            Voir l'Annexe C pour une liste des phénomènes dangereux significatifs.
Le présent document est applicable aux débroussailleuses et coupe-herbe portatifs à moteur, fabriqués après sa date de publication.

Kmetijski in gozdarski stroji - Tehnične varnostne zahteve in preskus za prenosne, ročno vodene kosilnice s prosto rezjo, opremljene z rezilno ploščo ali kosilno nitko - 1. del: Naprave z motorjem z notranjim zgorevanjem (ISO 11806-1:2022)

Ta dokument določa varnostne zahteve in ukrepe za njihovo preverjanje za načrtovanje ter izdelavo prenosnih, ročno vodenih kosilnic s prosto rezjo, opremljenih z rezilno ploščo ali kosilno nitko (v nadaljevanju: »stroji«), ki imajo motorje z notranjim izgorevanjem in mehanski prenos napajanja med virom napajanja in nastavkom za rezanje. Predpisane so metode za odpravljanje ali zmanjšanje tveganj, ki izhajajo iz uporabe teh strojev, in vrsta informacij o varnih delovnih praksah, ki jih mora zagotoviti proizvajalec. Ta dokument obravnava vsa večja tveganja, nevarne situacije in nevarne dogodke v zvezi s temi stroji, kadar se uporabljajo v skladu s predvidenim namenom in pod pogoji pričakovane nepravilne uporabe, ki jih določa proizvajalec. Ta dokument se ne uporablja za stroje, opremljene s kovinskimi nastavki za rezanje, ki jih sestavlja več delov, npr. vrteče se verige ali mlatilne lopatice. OPOMBA: Za seznam večjih tveganj glej dodatek C. Ta dokument se uporablja za prenosne, ročno vodene kosilnice s prosto rezjo, opremljene z rezilno ploščo ali kosilno nitko, izdelane po datumu njegove izdaje.

General Information

• Status: Published
• Publication Date: 29-Mar-2022
• Withdrawal Date: 29-Sep-2022
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 6 - Manually portable forestry machinery
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 30-Mar-2022
• Completion Date: 30-Mar-2022
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: SIST EN ISO 11806-1:2022 - Agricultural and forestry machinery - Safety requirements and testing for portable, hand-held, powered brush-cutters and grass-trimmers - Part 1: Machines fitted with an integral combustion engine (ISO 11806-1:2022)

Relations

• Replaces: EN ISO 11806-1:2011 - Agricultural and forestry machinery - Safety requirements and testing for portable, hand-held, powered brush-cutters and grass-trimmers - Part 1: Machines fitted with an integral combustion engine (ISO 11806-1:2011)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 11806-1:2012
Kmetijski in gozdarski stroji - Tehnične varnostne zahteve in preskus za prenosne,
ročno vodene kosilnice s prosto rezjo, opremljene z rezilno ploščo ali kosilno
nitko - 1. del: Naprave z motorjem z notranjim zgorevanjem (ISO 11806-1:2022)
Agricultural and forestry machinery - Safety requirements and testing for portable, hand-
held, powered brush-cutters and grass-trimmers - Part 1: Machines fitted with an integral
combustion engine (ISO 11806-1:2022)
Land- und forstwirtschaftliche Maschinen - Sicherheitstechnische Anforderungen und
Prüfung für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer -
Teil 1: Maschinen mit Antrieb durch integrierten Verbrennungsmotor (ISO 11806-1:2022)
Matériel agricole et forestier - Exigences de sécurité et essais pour débroussailleuses et
coupe-herbe portatifs à moteur - Partie 1: Machines équipées d'un moteur à combustion
interne intégré (ISO 11806-1:2022)
Ta slovenski standard je istoveten z: EN ISO 11806-1:2022
ICS:
65.060.80 Gozdarska oprema Forestry equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11806-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 65.060.80 Supersedes EN ISO 11806-1:2011
English Version
Agricultural and forestry machinery - Safety requirements
and testing for portable, hand-held, powered brush-cutters
and grass-trimmers - Part 1: Machines fitted with an
integral combustion engine (ISO 11806-1:2022)
Matériel agricole et forestier - Exigences de sécurité et Land- und forstwirtschaftliche Maschinen -
essais pour débroussailleuses et coupe-herbe portatifs Sicherheitstechnische Anforderungen und Prüfung für
à moteur - Partie 1: Machines équipées d'un moteur à tragbare handgehaltene motorbetriebene
combustion interne intégré (ISO 11806-1:2022) Freischneider und Grastrimmer - Teil 1: Maschinen mit
Antrieb durch integrierten Verbrennungsmotor (ISO
11806-1:2022)
This European Standard was approved by CEN on 26 December 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11806-1:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 4

European foreword
This document (EN ISO 11806-1:2022) has been prepared by Technical Committee ISO/TC 23 "Tractors
and machinery for agriculture and forestry" in collaboration with Technical Committee CEN/TC 144
“Tractors and machinery for agriculture and forestry” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11806-1:2011.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11806-1:2022 has been approved by CEN as EN ISO 11806-1:2022 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered
This European Standard has been prepared under Commission’s standardization request "M/396
mandate to CEN and CENELEC for standardisation in the field of machinery" to provide one voluntary
means of conforming to essential requirements of the Directive 2006/42/EC of the European
Parliament and of the Council of 17 May 2006 on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding Essential
Requirements, of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2006/42/EC
The relevant Essential Requirements Clause(s)/sub-clause(s) Remarks/Notes
of EU Directive 2006/42/EC of this EN
1. ESSENTIAL HEALTH AND SAFETY
REQUIREMENTS
1.1.2. Principles of safety integration 4.1
1.1.3. Materials and products 4.15
1.1.5. Design of machinery to facilitate its 4.2; 4.4
handling
1.1.6. Ergonomics 4.2; 4.4; 4.5
1.1.7. Operating positions 4.18; 5.1; 5.2
1.2. CONTROL SYSTEMS
1.2.1. Safety and reliability of control
4.11; 4.12; 4.13; 4.14
systems
1.2.2. Control devices 4.11; 4.12; 4.13; 5.2; 5.3
1.2.3. Starting 4.11; 4.13
1.2.4. Stopping
1.2.4.1. Normal stop 4.12
1.2.4.2. Operational stop 4.14
1.2.4.4. Assembly of machinery 4.12; 4.14

1.2.5. Selection of control or operating Not covered
modes
1.2.6. Failure of the power supply 4.11; 4.12
1.3. PROTECTION AGAINST MECHANICAL
HAZARDS
The relevant Essential Requirements Clause(s)/sub-clause(s) Remarks/Notes
of EU Directive 2006/42/EC of this EN

1.3.1. Risk of loss of stability Not covered
1.3.2. Risk of break-up during operation 4.6; 4.15; 5.1
1.3.3. Risks due to falling or ejected objects 5.1; 4.6; 4.7; 4.8
1.3.4. Risks due to surfaces, edges or angles 4.1; 4.9
1.3.6. Risks related to variations in 4.13
operating conditions
1.3.7. Risks related to moving parts 4.3; 4.14; 4.8
1.3.8. Choice of protection against risks
arising from moving parts
1.3.8.1. Moving transmission parts 4.1
1.3.8.2. Moving parts involved in the 4.3; 4.8
process
1.3.9. Risks of uncontrolled movements 4.13; 4.14
1.4. REQUIRED CHARACTERISTICS OF
GUARDS AND PROTECTIVE DEVICES
1.4.1. General requirements 4.3; 4.17
1.4.2.1. Fixed guards 4.3; 4.8
1.4.2.2. Interlocking movable guards - not covered
1.4.2.3. Adjustable guards restricting access - not covered

1.4.3. Special requirements for protective not covered
devices
1.5. RISKS DUE TO OTHER HAZARDS
1.5.2. Static electricity - not covered
1.5.3. Energy supply other than electricity 4.15
1.5.4. Errors of fitting 5.1
1.5.5. Extreme temperatures 4.17
1.5.6. Fire 4.15; 5.1
1.5.8. Noise 4.20; 5.1
1.5.9. Vibrations 4.19; 5.1
1.5.11. External radiation 4.21
1.5.13. Emissions of hazardous materials 4.15; 4.18
and substances
1.5.15. Risk of slipping, tripping or falling - not covered
1.6. MAINTENANCE
1.6.1. Machinery maintenance 4.7; 5.1
1.6.2. Access to operating positions and - not covered
servicing points
The relevant Essential Requirements Clause(s)/sub-clause(s) Remarks/Notes
of EU Directive 2006/42/EC of this EN
1.6.3. Isolation of energy sources 4.12
1.6.4. Operator intervention 5.1; 5.3
1.6.5. Cleaning of internal parts - not covered
1.7. INFORMATION
1.7.1. Information and warnings on the 5.2; 5.3
machinery
1.7.1.1. Information and information 5.2; 5.3
devices
1.7.1.2. Warning devices - not covered
1.7.2. Warning of residual risks 5.1; 5.2; 5.3
1.7.3. Marking of machinery 5.2
1.7.4. Instructions 5.1
1.7.4.1. General principles for the drafting 5.1
of instructions
1.7.4.2. Contents of the instructions from a) 5.1
to t) and v)
1.7.4.2. u) This standard does not provide
presumption of conformity with
regard to the determination of
sound power level.
1.7.4.3. Sales literature Not covered
2. SUPPLEMENTARY ESSENTIAL HEALTH
AND SAFETY REQUIREMENTS FOR
CERTAIN CATEGORIES OF MACHINERY
2.2. PORTABLE HAND-HELD AND/OR
HAND-GUIDED MACHINERY
2.2.1. General 4.2; 4.12; 4.13; 4.14
2.2.1.1. Instructions 5.1
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 11806-1
Second edition
2022-02
Agricultural and forestry
machinery — Safety requirements
and testing for portable, hand-held,
powered brush-cutters and grass-
trimmers —
Part 1:
Machines fitted with an integral
combustion engine
Matériel agricole et forestier — Exigences de sécurité et essais pour
débroussailleuses et coupe-herbe portatifs à moteur —
Partie 1: Machines équipées d'un moteur à combustion interne
intégré
Reference number
ISO 11806-1:2022(E)
ISO 11806-1:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 11806-1:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Safety requirements and/or protective measures . 4
4.1 General . 4
4.2 Handles . 5
4.2.1 Requirements . 5
4.2.2 Verification . 6
4.3 Barrier and distance to cutting attachment for brush-cutters . 6
4.3.1 Requirements . 6
4.3.2 Verification . 7
4.4 Harness . . 8
4.4.1 Requirements . 8
4.4.2 Verification . 8
4.5 Balance . 8
4.5.1 Requirements . 8
4.5.2 Verification . 9
4.6 Cutting attachment strength . 9
4.6.1 Requirements . 9
4.6.2 Verification . 9
4.7 Cutting attachment retention. 9
4.7.1 Requirements . 9
4.7.2 Verification . 9
4.8 Cutting attachment guards. 10
4.8.1 Requirements . 10
4.8.2 Verification . 10
4.9 Transport cover . 10
4.9.1 Requirements . 10
4.9.2 Verification . 10
4.10 Length of flexible cutting lines. 10
4.10.1 Requirements . 10
4.10.2 Verification . 11
4.11 Engine starting device . 11
4.11.1 Requirements . 11
4.11.2 Verification . 11
4.12 Engine stopping device . 11
4.12.1 Requirements . 11
4.12.2 Verification . 11
4.13 Throttle control . 11
4.13.1 Position . 11
4.13.2 Operation . 11
4.13.3 Throttle control latch . 13
4.14 Clutch . 14
4.14.1 Requirements . 14
4.14.2 Verification . 14
4.15 Tanks . 14
4.15.1 General . 14
4.15.2 Fuel tank structural integrity . 15
4.15.3 Fuel feed line strength and accessibility. 15
4.16 Protection against contact with parts of the machine under high voltage .15
4.16.1 Requirements . 15
iii
ISO 11806-1:2022(E)
4.16.2 Verification . 15
4.17 Protection against contact with hot parts . 15
4.17.1 Requirements .15
4.17.2 Verification . 15
4.18 Exhaust gases . 16
4.18.1 Requirement . 16
4.18.2 Verification . 16
4.19 Vibration . 17
4.19.1 Reduction by design at source and by protective measures . 17
4.19.2 Vibration measurement . 17
4.20 Noise . 17
4.20.1 Reduction by design at source and by protective measures . 17
4.20.2 Noise measurement . 17
4.21 Electromagnetic immunity . 17
4.21.1 Requirements . 17
4.21.2 Verification . 17
5 Information for use .18
5.1 Instructions . 18
5.1.1 General . 18
5.1.2 Technical data . 18
5.1.3 Other information . 18
5.2 Marking . 20
5.3 Warnings . 21
5.4 Test of labels . 22
5.4.1 Preparation of test specimens and control specimens .22
5.4.2 Wipe resistance test . 22
5.4.3 Adhesion test . 23
Annex A (normative) Cutting attachment impact and spin test .24
Annex B (normative) Thrown objects test .26
Annex C (informative) List of significant hazards .30
Annex D (normative) Structural integrity of fuel tanks .32
Annex E (normative) Procedures for the evaluation of the strength and accessibility of fuel
feed lines.33
Bibliography .34
iv
ISO 11806-1:2022(E)
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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture
and forestry, Subcommittee SC 17, Manually portable (hand-held) powered lawn and garden equipment and
forest machinery, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 144, Tractors and machinery for agriculture and forestry, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 11806-1:2011), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Figure 3 has been revised to provide examples of handle distance;
— a force requirement in the throttle trigger lock-out performance test has been added;
— Figures 5a and 5b have been added to clarify throttle trigger lock-out performance test;
— fuel tank structural integrity test requirements have been added by including a new Annex D;
— fuel line strength and accessibility requirements have been added by including a new Annex E;
— Annex A, cutting attachment impact and spin test, has been revised for repeatability.
A list of all parts in the ISO 11806 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
ISO 11806-1:2022(E)
Introduction
This document is a type-C standard as stated in ISO 12100:2010.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organisations, market surveillance, etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous events
are covered are indicated in the scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or
type-B standards, the requirements of this type-C standard take precedence over the requirements of
the other standards for machines that have been designed and built according to the requirements of
this type-C standard.
vi
INTERNATIONAL STANDARD ISO 11806-1:2022(E)
Agricultural and forestry machinery — Safety
requirements and testing for portable, hand-held, powered
brush-cutters and grass-trimmers —
Part 1:
Machines fitted with an integral combustion engine
1 Scope
This document gives safety requirements and measures for their verification for the design and
construction of portable hand-held, powered brush-cutters and grass-trimmers (hereafter called
machines) having an integral combustion engine as their power unit and mechanical power transmission
between the power source and the cutting attachment. Methods for the elimination or reduction of
hazards arising from the use of these machines and the type of information on safe working practices
to be provided by the manufacturer are specified.
This document deals with all significant hazards, hazardous situations and hazardous events relevant
to these machines, as well as when they are used as intended and under conditions of misuse which are
reasonably foreseeable by the manufacturer.
This document is not applicable to machines equipped with metallic cutting attachments consisting of
more than one piece, such as pivoting chains or flail blades.
NOTE See Annex C for a list of significant hazards.
This document is applicable to portable, hand-held, powered brush-cutters and grass-trimmers
manufactured after its date of publication.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 683-4:2016, Heat-treatable steels, alloy steels and free-cutting steels — Part 4: Free-cutting steels
ISO 3767-1:2016, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Symbols for operator controls and other displays — Part 1: Common symbols
ISO 3767-5:2016, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Symbols for operator controls and other displays — Part 5: Symbols for manual portable forestry machines
ISO 7112:2018, Machinery for forestry — Portable brush-cutters and grass-trimmers — Vocabulary
ISO 7113:1999, Portable hand-held forestry machines — Cutting attachments for brush cutters — Single-
piece metal blades
ISO 7918:1995, Forestry machinery — Portable brush-cutters and grass-trimmers — Cutting attachment
guard dimensions
ISO 8380:1993, Forestry machinery — Portable brush-cutters and grass-trimmers — Cutting attachment
guard strength
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 11806-1:2022(E)
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper
and lower limbs
ISO 14982:1998, Agricultural and forestry machinery — Electromagnetic compatibility — Test methods
and acceptance criteria
ISO 22867:2021, Forestry and gardening machinery — Vibration test code for portable hand-held
machines with internal combustion engine — Vibration at the handles
ISO 22868:2021, Forestry and gardening machinery — Noise test code for portable hand-held machines
with internal combustion engine — Engineering method (Grade 2 accuracy)
IEC 61032:1997, Protection of persons and equipment by enclosures — Probes for verification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7112:2018, ISO 12100:2010
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
machine
complete brush-cutter, brush saw or grass-trimmer, including power unit, drive shaft tube, cutting
attachment and guard, but excluding the harness
ISO 11806-1:2022(E)
Key
1 throttle trigger lock-out
2 stop switch
3 suspension point
4 handle
5 throttle trigger
6 drive shaft tube
7 harness, quick-release mechanism
8 harness, hip pad
9 cutting attachment guard
10 cutting attachment, e.g. saw blade
11 muffler
12 power unit
13 choke
Figure 1 — Machine (brush-cutter) with integral combustion engine
ISO 11806-1:2022(E)
Key
1 choke
2 rear handle
3 stop switch
4 throttle trigger
5 front handle
6 drive shaft tube
7 cutting attachment guard
8 muffler
9 cutting attachment, e.g. string trimmer head
10 power unit
Figure 2 — Machine (grass-trimmer) with integral combustion engine
4 Safety requirements and/or protective measures
4.1 General
Machines shall comply with the safety requirements and/or protective measures of this clause. In
addition, the machine shall be designed according to the principles of ISO 12100:2010 for relevant but
not significant hazards which are not dealt with by this document. The machine shall also be marked
according to 5.2 and carry warnings according to 5.3.
The safe operation of a brush-cutter and a grass-trimmer depends on both the safety requirements
given in this clause and the safe working conditions associated with the use of adequate personal
ISO 11806-1:2022(E)
protection equipment (PPE), such as gloves, slip-resistant footwear, and leg, eye and hearing protection
equipment, as well as safe working procedures (see 5.1).
The instructions to be provided with the machine shall conform with 5.1.
If a grass-trimmer can be converted to a brush-cutter, then the converted machine shall conform with
the requirements for a brush-cutter and vice versa.
The overall safety of the separate cutting attachment shall be verified as a part of the complete machine.
Except where otherwise specified in this document, the safety distances specified in ISO 13857:2019,
4.2.4.1 and 4.2.4.3 shall be met.
If a special tool is required to replace a cutting attachment, it shall be supplied with the machine.
4.2 Handles
4.2.1 Requirements
The machine shall have a handle for each hand. These handles shall be designed such that:
— they can be fully gripped by an operator when wearing gloves;
— they provide the necessary sureness of grip by their shaping and surface;
— they have a length of at least 100 mm;
— the distance l (see Figure 3) between the centre of the handles is at least 500 mm for those machines
which can be equipped with metal saw blades, and at least 250 mm for all others;
— they are adjustable so that a suitable ergonomic working position can be achieved. An adjustment
below the minimum distance l shall be prevented by design.
NOTE The position of the operator relative to the cutting attachment is defined by the suspension point (see
4.5 and 4.6) and the barrier (see 4.3).
ISO 11806-1:2022(E)
Key
1 centre of gripping area
Figure 3 — Examples for handle distance l
4.2.2 Verification
The design, adjustment and dimensions shall be verified by inspection and measurements and function
test.
4.3 Barrier and distance to cutting attachment for brush-cutters
4.3.1 Requirements
Brush-cutters shall be equipped with a barrier to prevent an unintentional contact with the cutting
attachment during operation.
The barrier shall project at least 200 mm horizontally and perpendicularly from the centre-line of the
drive shaft tube. This function can also be performed by the handle assembly. See Figure 4.
The minimum straight line distance from the rear of the barrier (2) at a width of 200 mm (2) to the
nearest unguarded point of the cutting attachment (1) shall be at least 830 mm, where the unguarded
point of the cutting attachment is the intersection between the plane perpendicular to the cutting path
and the side-edge of the cutting attachment guard. See Figure 4.
Barriers that are to be removed as a part of maintenance procedures or assembled by the operator,
described in the instructions, shall be fixed by systems that can be opened or removed only with tools.
The fixing system for barriers which are independent from the handle assembly shall be permanently
attached to the barrier and/or the machine when the barrier is removed.
ISO 11806-1:2022(E)
Dimensions in millimetres
a) Bicycle-type handle serving as a barrier
b) Front and rear handles with front handle serving as a barrier
c) Front and rear handle with separate barrier
Key
1 unguarded point of the cutting attachment
2 rear of the handle bar/barrier
Figure 4 — Example of machines with different handle configurations, barrier and distance to
cutting attachment
4.3.2 Verification
The design, adjustment and dimensions shall be verified by inspection and measurements.
ISO 11806-1:2022(E)
4.4 Harness
4.4.1 Requirements
A double shoulder harness shall be provided for all machines exceeding a dry weight of 7,5 kg and for all
brush saws. The double shoulder harness shall be supplied with a hip pad.
Brush-cutters other than brush saws having a dry weight of 7,5 kg or less and grass-trimmers having
a dry weight of 6 kg to 7,5 kg shall at least be provided with a single shoulder harness. For a grass-
trimmer w
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