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)

ISO 11806-1:2011 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.
ISO 11806-1:2011 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.
ISO 11806-1:2011 is not applicable to machines equipped with metallic cutting attachments consisting of more than one piece, e.g. pivoting chains or flail blades.
ISO 11806-1:2011 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 11806-1:2011)

Dieser Teil der ISO 11806 legt sicherheitstechnische Anforderungen und Maßnahmen zu deren Überprüfung für die Gestaltung und Konstruktion von tragbaren, handgehaltenen motorbetriebenen Freischneidern und Grastrimmern (im Folgenden Maschinen genannt), mit eingebautem Verbrennungsmotor als Antriebseinheit und mechanischer Kraftübertragung zwischen Antriebsquelle und Schneidgarnitur fest. Methoden zur Vermeidung oder Verminderung der sich aus dem Gebrauch ergebenden Gefährdungen dieser Maschinen sowie Informationen über sicheres Arbeiten, die vom Hersteller zur Verfügung zu stellen sind, werden festgelegt. Dieser Teil der ISO 11806 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. Dieser Teil der ISO 11806 gilt nicht für Maschinen, die mit mehrteiligen, metallischen Schneidwerkzeugen, z. B. schwenkbaren Ketten oder Schlegelmessern, ausgestattet sind. ANMERKUNG Siehe Anhang D zur Liste der signifikanten Gefährdungen. Dieser Teil der ISO 11806 gilt für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer, die nach dem Veröffentlichungsdatum dieser Norm hergestellt wurden.

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 11806-1:2011)

L'ISO 11806-1:2011 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.
L'ISO 11806-1:2011 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.
L'ISO 11806-1:2011 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.
L'ISO 11806-1:2011 est applicable aux machines fabriquées 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 11806-1:2011)

Ta del standarda ISO 11806 določa varnostne zahteve in ukrepe za njihovo preverjanje za zasnovo in konstrukcijo 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 del standarda ISO 11806 opisuje vsa večja tveganja, nevarne situacije in nevarne dogodke v zvezi s temi stroji, kadar se uporabljajo v skladu z njihovim namenom in pod pogoji pričakovane nepravilne uporabe, ki jih določa proizvajalec. Ta del standarda ISO 11806 se ne uporablja za stroje, opremljene s kovinskimi nastavki za rezanje, ki jih sestavlja več delov, npr. vrteče se verige ali mlatilne lopatice. Ta del standarda ISO 11806 se uporablja za prenosne, ročne motorne žage za nego in motorne kose, izdelane po datumu njegove izdaje.

General Information

Status
Withdrawn
Publication Date
30-Nov-2011
Withdrawal Date
20-Jan-2026
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
30-Mar-2022
Completion Date
21-Jan-2026

Relations

Effective Date
18-Jan-2012
Effective Date
08-Jun-2022
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Standard

EN ISO 11806-1:2012

English language
38 pages
Preview
Preview
e-Library read for
1 day

Get Certified

Connect with accredited certification bodies for this standard

Rainforest Alliance

International non-profit sustainability certification organization.

ANAB United States Verified

SCS Global Services

Global leader in environmental and sustainability certification.

ANAB United States Verified

DNV Business Assurance China

Accredited by CNAS for wind turbine and component certification.

CNAS China Verified

Sponsored listings

Frequently Asked Questions

EN ISO 11806-1:2011 is a standard published by the European Committee for Standardization (CEN). Its full title is "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)". This standard covers: ISO 11806-1:2011 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. ISO 11806-1:2011 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. ISO 11806-1:2011 is not applicable to machines equipped with metallic cutting attachments consisting of more than one piece, e.g. pivoting chains or flail blades. ISO 11806-1:2011 is applicable to portable, hand-held, powered brush-cutters and grass-trimmers manufactured after its date of publication.

ISO 11806-1:2011 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. ISO 11806-1:2011 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. ISO 11806-1:2011 is not applicable to machines equipped with metallic cutting attachments consisting of more than one piece, e.g. pivoting chains or flail blades. ISO 11806-1:2011 is applicable to portable, hand-held, powered brush-cutters and grass-trimmers manufactured after its date of publication.

EN ISO 11806-1:2011 is classified under the following ICS (International Classification for Standards) categories: 65.060.50 - Harvesting equipment; 65.060.80 - Forestry equipment. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 11806-1:2011 has the following relationships with other standards: It is inter standard links to EN ISO 11806:2008, EN ISO 11806-1:2022, EN 971-1:1996, EN 54-7:2000, EN ISO 2114:2000/AC:2005, EN ISO 19119:2006, EN 1869:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN ISO 11806-1:2011 is associated with the following European legislation: EU Directives/Regulations: 2006/42/EC, 98/37/EC; Standardization Mandates: M/079, M/396. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

EN ISO 11806-1:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-marec-2012
.PHWLMVNLLQJR]GDUVNLVWURML7HKQLþQHYDUQRVWQH]DKWHYHLQSUHVNXV]DSUHQRVQH
URþQRYRGHQHNRVLOQLFHVSURVWRUH]MRRSUHPOMHQH]UH]LOQRSORãþRDOLNRVLOQR
QLWNRGHO1DSUDYH]PRWRUMHP]QRWUDQMLP]JRUHYDQMHP ,62
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)
Land- und forstwirtschaftliche Maschinen - Sicherheitstechnische Anforderungen und
Prüfung für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer -
Teil 1: Maschinen mit Antrieb durch Verbrennungsmotor (ISO 11806-1:2011)
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 11806-1:2011)
Ta slovenski standard je istoveten z: EN ISO 11806-1:2011
ICS:
65.060.80 Gozdarska oprema Forestry equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11806-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2011
ICS 65.060.80 Supersedes EN ISO 11806:2008
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 11806-1:2011)
Matériel agricole et forestier - Exigences de sécurité et Land- und forstwirtschaftliche Maschinen -
essais pour débroussailleuses et coupe-herbe portatifs à Sicherheitstechnische Anforderungen und Prüfung für
moteur - Partie 1: Machines équipées d'un moteur à tragbare handgehaltene motorbetriebene Freischneider und
combustion interne intégré (ISO 11806-1:2011) Grastrimmer - Teil 1: Maschinen mit Antrieb durch
Verbrennungsmotor (ISO 11806-1:2011)
This European Standard was approved by CEN on 30 November 2011.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11806-1:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4

Foreword
This document (EN ISO 11806-1:2011) 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 June 2012, and conflicting national standards shall be withdrawn at
the latest by June 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11806:2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11806-1:2011 has been approved by CEN as EN ISO 11806-1:2011 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

INTERNATIONAL  ISO
STANDARD 11806-1
First edition
2011-12-01
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 11806-1:2011(E)
©
ISO 2011
ISO 11806-1:2011(E)
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
Contents Page
Foreword .iv
Introduction .v
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
4.3 Barrier and distance to cutting attachment for brush-cutters . 6
4.4 Harness . 7
4.5 Balance . 8
4.6 Cutting-attachment strength . 8
4.7 Cutting-attachment retention . 8
4.8 Cutting-attachment guards . 9
4.9 Transport cover . 9
4.10 Length of flexible cutting lines .10
4.11 Engine starting device .10
4.12 Engine stopping device .10
4.13 Throttle control .10
4.14 Clutch .12
4.15 Tanks .12
4.16 Protection against contact with parts under high voltage .13
4.17 Protection against contact with hot parts .13
4.18 Exhaust gases .14
4.19 Vibration .14
4.20 Noise .14
4.21 Electromagnetic immunity .15
5 Information for use .15
5.1 Instruction handbook .15
5.2 Marking .17
5.3 Warnings .18
5.4 Test of labels .19
Annex A (normative) Cutting-attachment impact test .21
Annex B (normative) Thrown objects test .23
Annex C (informative) List of significant hazards .27
Bibliography .29
© ISO 2011 – All rights reserved  iii

ISO 11806-1:2011(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 11806-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 17, Manually portable forest machinery.
This first edition of ISO 11806-1 cancels and replaces ISO 11806:1997, of which it is also a technical revision.
ISO 11806 consists of the following parts, under the general title 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
—  Part 2: Machines for use with back-pack power unit
iv © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
Introduction
This document is a type-C standard as stated in ISO 12100.
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.
© ISO 2011 – All rights reserved  v

INTERNATIONAL STANDARD ISO 11806-1:2011(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 part of ISO 11806 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 part of ISO 11806 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 part of ISO 11806 is not applicable to machines equipped with metallic cutting attachments consisting of
more than one piece, e.g. pivoting chains or flail blades.
NOTE  See Annex C for a list of significant hazards.
This part of ISO 11806 is applicable to portable, hand-held, powered brush-cutters and grass-trimmers
manufactured after its date of publication.
2 Normative references
The following referenced documents are indispensable for the application 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 683-9:1988, Heat-treatable steel, alloy steels and free-cutting steels — Part 9: Wrought free-cutting steels
ISO 7112, 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,  Forestry machinery — Portable brush-cutters and grass-trimmers — Cutting attachment guard
dimensions
ISO 8380,  Forestry machinery — Portable brush-cutters and grass-trimmers — Cutting attachment guard
strength
ISO 8893, Forestry machinery — Portable brush-cutters and grass-trimmers — Engine performance and fuel
consumption
ISO/TR 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and equipment —
Part 1: Planning
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
© ISO 2011 – All rights reserved  1

ISO 11806-1:2011(E)
ISO 13857:2008, 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, Forestry and gardening machinery — Vibration test code for portable hand-held machines with
internal combustion engine — Vibration at the handles
ISO 22868, Forestry and gardening machinery — Noise test code for portable hand-held machines with internal
combustion engine — Engineering method (Grade 2 accuracy)
IEC 60745-1:2006, Hand-held motor-operated electric tools — Safety — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7112, ISO 12100 and the following
apply.
NOTE  Figure 1 provides an example of a brush-cutter and Figure 2 of a grass-trimmer within the scope of this part of
ISO 11806.
3.1
machine
complete brush-cutter (or grass-trimmer) including power unit, drive shaft tube, cutting attachment and guard,
but excluding the harness
2 © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
111 111222
999 8
Key
1  throttle trigger lockout
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
Figure 1 — Brush-cutter with integral power source
© ISO 2011 – All rights reserved  3

ISO 11806-1:2011(E)
222 111
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 — Grass-trimmer with integral power source
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 for relevant but not significant hazards
which are not dealt with by this part of ISO 11806. 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 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 instruction handbook to be provided with the machine shall comply with 5.1.
4 © ISO 2011 – All rights reserved

l
l
ISO 11806-1:2011(E)
If a grass-trimmer can be converted to a brush-cutter then the converted machine shall comply with requirements
for a brush-cutter and vice versa.
The overall safety of the separate cutting attachment has to be verified as a part of the complete machine.
Except where otherwise specified in this part of ISO 11806, the safety distances specified in ISO 13857:2008,
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).
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.
© ISO 2011 – All rights reserved  5
l
ISO 11806-1:2011(E)
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, described in the instruction handbook,
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.
Dimensions in millimetres
≥ 883500
a)  Bicycle-type handle serving as a barrier
≥ 883500
b)  Front and rear handles with front handle serving as a barrier
6 © ISO 2011 – All rights reserved
ISO 11806-1:2011(E)
≥ 885300
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.
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.
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 with a dry
weight below 6 kg, no harness is required.
The double shoulder harness shall be designed so that pressure is evenly distributed on both shoulders of the
operator. The design of the double shoulder harness shall prevent slipping in any direction and be supplied
with a hip pad.
All double shoulder harnesses shall be equipped with a quick-release mechanism positioned either at the
connection between the machine and harness or between the harness and operator. Either the design of the
harness or the use of the quick-release mechanism shall ensure that the machine can be released quickly from
the operator in the event of emergency.
The harness shall be adjustable to the size of the operator.
If a quick-release mechanism is provided, it shall be possible to open it under load and release the machine
using only one hand.
4.4.2 Verification
The type of harness and its adjustment shall be verified by inspection. The quick-release mechanism(s) shall
be checked by a function test carried out by a person wearing the harness and with a vertical load of three
times the dry weight of the machine acting on the suspension point.
© ISO 2011 – All rights reserved  7
ISO 11806-1:2011(E)
4.5 Balance
4.5.1 Requirements
4.5.1.1 All machines requiring a harness, except those described in 4.5.1.2, shall have the suspension point
(see Figure 3) adjustable so that the machine is balanced when it is suspended on this point.
Such a balanced machine, with the suspension point at a minimum vertical distance of 750 mm above the
ground, shall have:
—  for brush-cutters: a distance from the ground to the nearest point of the blade of 200 mm ± 100 mm;
—  for grass-trimmers: a distance from the ground to the nearest point of the cutting attachment of 200
+100
mm.
− 200
The requirements shall be met with tanks that are half filled and for recommended cutting attachments.
4.5.1.2 Machines suspended with a harness, and designed to be supported by the ground shall have the
suspension point adjustable so that the ground contact force is not greater than 20 N, with tanks that are half
filled and for recommended cutting attachments.
4.5.2 Verification
The requirements of 4.5.1 shall be verified by inspection and measurement using the lightest and heaviest
recommended cutting attachments.
4.6 Cutting-attachment strength
4.6.1 Requirements
The cutting attachment, excluding flexible cutting lines, shall not break or crack when impacted once against a
steel rod of diameter 25 mm  ± 1 mm.
The same cutting attachment shall then, without any adjustments, not break or crack when operated at an
over-speed.
An exception from this second requirement is made for a single-piece metal blade. Such blades shall instead
meet the material requirements in ISO 7113:1999, Clause 5.
These requirements are applicable to all recommended cutting attachments.
4.6.2 Verification
Impact strength shall be verified by a test according to Annex A and the same cutting attachment shall then be
run for 5 min at 1,33 times racing speed (over-speed), as defined in ISO 7112. The final verification for cracks
shall be done by visual inspection.
Single-piece metal blades shall be verified by testing in accordance with ISO 7113:1999, Clause 5.
4.7 Cutting-attachment retention
4.7.1 Requirements
Metallic cutting attachments shall be secured to prevent relative motion between the cutting attachment and
the retainer, or between the metallic cutting attachment and the shaft on which it is mounted.
The method for securing the metallic cutting attachment shall also prevent loosening of the cutting attachment
during use.
8 © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
These requirements are applicable to all metallic cutting attachments recommended in the instruction handbook.
4.7.2 Verifications
The method of attachment shall be verified by inspection and by using the following test procedure.
a)  Install the cutting attachment in accordance with the instruction handbook.
b)  Lock the power transmission shaft.
c)  Apply to the cutting attachment a rotational torque, M, in newton metres (N · m):
M = 0,4  × V × k
where
V  is the engine displacement, in cubic centimetres (cm);
k  is the gear ratio (engine/cutting-attachment rotational frequency).
Conduct the test five times in the direction of normal rotation, then five times in the opposite direction.
4.8 Cutting-attachment guards
4.8.1 Requirements
The guard dimensions shall comply with ISO 7918.
The guard location shall comply with ISO 7918, for all possible adjustments.
The guard strength shall comply with ISO 8380 for all guards, except for the test at -25ºC which does not apply
to the guard of grass-trimmers.
Guard dimensions shall comply with the specifications in ISO 7918 before and after the tests specified
in 4.8.2.
In a thrown-objects test in accordance with Annex B, no more than three penetrations in the area from 0,3 m to
2 m in height are allowed. If more than three penetrations occur, the test has to be repeated five times with no
more than three penetrations in each of these tests. No cracks or breakages of the guards are allowed.
Guards that are to be removed in connection with a change of cutting attachment or as part of maintenance
procedures, described in the instruction handbook, shall be fixed by systems that can be opened or removed
only with tools. These guards-fixing systems shall remain attached to the guards or to the machinery when the
guards are removed.
4.8.2 Verification
Guard dimensions, fixing system and locations shall be verified by inspection and measurements. Strength
requirements shall be verified by testing in accordance with ISO 8380. The thrown-objects requirement shall
be verified by testing in accordance with Annex B.
4.9 Transport cover
4.9.1 Requirements
Machines with a metallic cutting attachment shall be provided with a transport cover, which shall be so designed
that it remains attached to the cutting attachment during transport and storage.
© ISO 2011 – All rights reserved  9

ISO 11806-1:2011(E)
4.9.2 Verification
The attachment of the transport cover to the cutting attachment shall be verified by inspection when holding
the machine in any direction.
4.10 Length of flexible cutting lines
4.10.1 Requirements
Grass-trimmers with flexible cutting lines shall have a line-limiting device or other means of line-length control.
The limiting device shall cut the flexible cutting lines to lengths compatible with the cutting-attachment guard.
4.10.2 Verification
The means to limit or control the line length shall be verified by a functional test and inspection.
4.11 Engine starting device
4.11.1 Requirements
The engine starting device shall be a self-contained, battery-operated electric starter and/or a manual starter
where the actuator is permanently attached to the machine.
Machines with a manual starter shall have a recoil device for the rope.
Two or more separate and dissimilar actions shall be required to activate the electrical starting device.
4.11.2 Verification
The means of starting the engine shall be verified by inspection and functional testing.
4.12 Engine stopping device
4.12.1 Requirements
The machine shall be fitted with an engine stopping device by means of which the engine can be brought to a
final stop and which does not depend on sustained manual effort for its operation. The control for this device
shall be so positioned that it can be operated while the machine is held with both hands by an operator wearing
gloves. The colour of the control shall clearly contrast with the background.
4.12.2 Verification
The correct functioning of the engine stopping device shall be verified by inspection while the machine is being
operated. The location of the control shall also be verified by inspection.
4.13 Throttle control
4.13.1 Position
4.13.1.1 Requirements
The throttle trigger shall be positioned so that it can be pressed and released with a gloved hand while holding
the handle to which the throttle trigger is mounted.
4.13.1.2 Verifications
The position shall be verified by inspection and functional testing.
10 © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
4.13.2 Operation
4.13.2.1 Requirements
The machine shall be provided with a throttle trigger that, when released, automatically reverts to the idling
position. The throttle trigger, except for grass-trimmers with a cutting attachment where each filament or
pivoting non-metallic blade has a kinetic energy of less than 10 J, shall be retained in the idling position by the
automatic engagement of a throttle trigger lock-out.
NOTE  When fitted to assist starting, a throttle lock will maintain an engine speed higher than the idling speed until the
throttle trigger is activated and released.
For brush-cutters and grass-trimmers with a cutting attachment where each filament or pivoting non-metallic
blade has a kinetic energy of 10 J or more, after the starting procedure has been finished, activation of the
throttle trigger to increase the engine speed, to a point where the cutting attachment starts to move, shall only
be possible after the throttle trigger lock-out has been disengaged.
The starting procedure is finished when the operator disengages the throttle lock and the engine returns to
idling speed.
Except for grass-trimmers with a cutting attachment, where each filament or pivoting non-metallic blade has
a kinetic energy of less than 10 J, unintentional movement of the cutting attachment shall be minimized by a
throttle control linkage so designed that a force applied to the handle, with the throttle trigger lock-out engaged,
will not increase the engine speed to a point where the clutch engages and cutting-attachment movement
begins.
For the calculation of kinetic energy, see 4.13.2.2.
4.13.2.2 Calculation of kinetic energy of filament and pivoting non-metallic blade
For the purposes of this part of ISO 11806 the kinetic energy (E) in joules, of filament and pivoting non-metallic
k
blades shall be calculated by means of the following equation:
 
π  L 
E = 0,5m n r −
k   
30 2
 
 
where:
L is the maximum free length of a filament or the length from the pivoting point to the outer tip for the
pivoting non-metallic blade, in metres;
m  is the mass of length L, in kilograms;
n  is the maximum rotational speed with a cutting element (blade or filament) with length L, in
revolutions per minute;
r is the distance from the axis of rotation of the cutting head to the outer tip of the cutting element, in
metres.
4.13.2.3 Verification
The function shall be verified by inspection while operating the machine. The throttle-control linkage design
shall be verified by applying a force in the most unfavourable direction on the handle with the throttle control,
equal to three times the weight of the machine (without a cutting attachment and with the tanks empty).
© ISO 2011 – All rights reserved  11

ISO 11806-1:2011(E)
4.13.3 Throttle lock
4.13.3.1 Requirements
If a throttle lock is provided to aid starting and its engagement will result in a movement of the cutting attachment
during starting, it shall be such that the throttle lock has to be engaged manually and shall be automatically
released when the throttle trigger is operated. In these cases, the activation device for setting the throttle lock
shall be located outside the gripping area of the handle and require at least two independent motions to engage
the throttle lock.
For finger-type throttle control, the gripping area is defined as extending from 25 mm in front of the rear part of
the throttle trigger to 75 mm behind the rear part of the throttle trigger.
For thumb-type throttle control, the gripping area is defined as the distance from the rear part of the throttle
trigger to the rearmost part of the handle.
The operational force on the throttle trigger for releasing the throttle lock shall not exceed 25 N.
4.13.3.2 Verification
The function of the throttle lock shall be verified by inspection and measurements while operating the machine.
The force to release the throttle lock shall be applied within 1 s at a position (5 ± 1) mm in front of the rear part
of the throttle trigger and in the direction of the trigger movement (perpendicular to the rotation radius of the
trigger).
4.14 Clutch
4.14.1 Requirements
All machines to which a blade can be attached shall have a clutch so designed that the cutting attachment does
not move when the engine rotates at any speed less than 1,25 times the idling speed.
4.14.2 Verification
Correct operation of the clutch shall be verified by inspection when increasing the engine speed from idling
speed to 1,25 times the highest idling speed specified in the instruction handbook.
4.15 Tanks
4.15.1 Requirements
Fuel tank caps shall have retainers.
The fuel tank opening shall be at least 20 mm in diameter and the oil tank opening, if existent, at least 15 mm in
diameter. Each opening or cap shall be clearly marked to indicate the function of the tank, and if only the caps
are marked, they shall not be interchangeable between tanks.
The design of the fuel tank assembly shall be such that no leakage occurs while the machine is at its normal
stable operating temperature, in all working positions and while being transported.
The filler openings shall be located so that the action of filling the tanks is not obstructed by other components.
It shall be possible to use a funnel.
4.15.2 Verification
The cap retainers, opening dimensions and location shall be verified by measurement and inspection. The
tightness of the caps shall be verified by inspection while turning the machine in any direction. Seepage from
fuel tank ventilation systems is not regarded as leakage.
12 © ISO 2011 – All rights reserved

ISO 11806-1:2011(E)
4.16 Protection against contact with parts under high voltage
4.16.1 Requirements
All high-voltage parts of the circuit, including spark-plug terminals, shall be located, insulated or guarded so
that the operator cannot make accidental contact with them.
Ignition interruption or short-circuiting shall be provided and shall be fitted on the low-voltage side.
4.16.2 Verification
The location and insulation of the parts under high voltage shall be verified by inspection, using a standard
test finger, in accordance with IEC 60745-1:2006, Figure 1. The ignition interruption or short-circuiting shall be
verified by inspection.
4.17 Protection against contact with hot parts
4.17.1 Requirements
The cylinder and parts in direct contact with the cylinder or the muffler shall be protected against unintentional
contact during normal operation of the machine.
Such hot surfaces shall be considered accessible if the contactable area exceeds 10 cm when probed by the
test cone as shown in Figure 5.
The temperature for the accessible parts of the machine defined above, including guards or shields provided
to prevent access to such hot surfaces, shall not be more than 80 ºC for metallic surfaces or 94 ºC for plastic
surfaces.
4.17.2 Verification
Verification shall be by determining the accessibility of identified hot surfaces using the test cone shown in
Figure 5 and as follows.
Conduct the temperature test in the shade and with a maximum wind speed of 3 m/s. Operate the engine by
cycling for 5 s at idling speed and 5 s at racing speed until the surface temperatures stabilize.
Identify the hot surface area or areas. Determine temperatures using temperature-measuring equipment with
an accuracy of ±2° C.
If the test is conducted at an ambient temperature outside of the nominal 20 °C ± 3 °C, the recorded temperatures
shall be corrected using the formula
T =T −T +20°C
C O A
where
T is the corrected temperature, in degrees Celsius (°C);
C
T   is the observed temperature, in degrees Celsius (°C);
O
T is the ambient temperature, in degrees Celsius (°C).
A
Allow the power source to cool before using the cone. It is not necessary to test the accessibility of hot parts
while they are hot.
Apply the test cone shown in Figure 5 in any direction and with a maximum force of (10 ) N. When moving
−1
the cone, determine whether there is any contact between the hot surface area or areas and the cone’s tip or
© ISO 2011 – All rights reserved  13

ISO 11806-1:2011(E)
the conical surface. Neither tip nor conical surface shall come into contact with any hot surface area greater
than 10 cm.
Dimensions in millimetres
Figure 5 — Test cone
4.18 Exhaust gases
4.18.1 Requirement
The exhaust outlet shall be located such that it directs exhaust emissions away from the operator’s face in
normal working positions.
4.18.2 Verification
The location and direction of the exhaust outlet shall be verified by inspection.
4.19 Vibration
4.19.1 Reduction by design at source and by protective measures
Vibration reduction shall be an integral part of the design process thus specifically taking into account measures
at source. The success of the applied vibration reduction measures is assessed on the basis of the actual
vibration total values for each handle.The main sources causing and influencing vibration are generally the
dynamic forces from engine, cutting means, unbalanced moving parts, impact in gear sprockets, bearings and
other mechanisms, and the interaction between operator, machine and material being worked.
[13]
NOTE 1  CR 1030-1  gives general technical information on widely recognized technic
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...