SIST EN ISO 11680-2:2009
(Main)Machinery for forestry - Safety requirements and testing for pole-mounted powered pruners - Part 2: Units for use with a back-pack power source (ISO 11680-2:2000)
Machinery for forestry - Safety requirements and testing for pole-mounted powered pruners - Part 2: Units for use with a back-pack power source (ISO 11680-2:2000)
This part of ISO 11680 specifies safety requirements, and the verification of those requirements, for the design, fabrication and use of portable, hand-held, pole-mounted powered pruners with a back-pack power unit, using a drive shaft to transmit power to cutting attachments. The cutting attachments covered are saw chains, and reciprocating and circular saw blades. This part of ISO 11680 describes methods for the elimination or reduction of hazards arising from their use. In addition it specifies the type of information on safe working practices to be provided by the manufacturer. It does not cover the risk of electric shock from overhead electric power lines during use of the pruners, with the exception of warnings and advice intended for inclusion in instruction handbooks. A test method and safety requirements addressing this risk are yet to be developed. The list of significant hazards which require action to reduce the risk is given in annex A. Environmental aspects have not been considered. This part of ISO 11680 applies primarily to pruners manufactured after its date of issue.
Forstmaschinen - Sicherheitstechnische Anforderungen und Prüfung für motorbetriebene Hochentaster - Teil 2: Geräte mit rückengetragener Antriebseinheit (ISO 11680-2:2000)
Dieser Teil der ISO 11680 enthält sicherheitstechnische Anforderungen und die Feststellung deren Übereinstimmung für die Gestaltung und Konstruktion von handgehaltenen Hochentastern mit rückengetragener Antriebseinheit mit Antriebswelle zur Übertragung der Energie auf die Schneidgarnituren. Die behandelten Schneidgarnituren sind Sägeketten, scherenartige Schneidvorrichtungen und rotierende Kreissägeblätter.
Dieser Teil der ISO 11680 beschreibt Verfahren für die Beseitigung oder Verringerung von Gefährdungen, die durch ihren Einsatz entstehen. Außerdem legt er die Art der Informationen für sichere Arbeitsweisen fest, die vom Hersteller zur Verfügung zu stellen sind. Das Risiko des Kontaktes oder der unmittelbaren Nähe zu Starkstromleitungen wird abgesehen von Warnhinweisen und Hinweisen in der Betriebsanleitung nicht behandelt. Um das Risiko des elektrischen Schlages durch Starkstromleitungen zu berücksichtigen, müssen Prüfmethoden und Anforderungen erarbeitet werden.
Die Liste der signifikanten Gefährdungen, die Maßnahmen zur Verminderung des Risikos erfordern, ist im Anhang A enthalten.
Die Gefährdung der Umwelt wird nicht in Betracht gezogen.
Dieser Teil der ISO 11680 gilt in erster Linie für Hochentaster, die nach dem Ausgabedatum der Norm hergestellt worden sind.
Matériel forestier - Exigences de sécurité et essais pour les perches élagueuses à moteur - Partie 2: Machines pour utilisation avec une source motrice portée à dos (ISO 11680-2:2000)
La présente partie de l'ISO 11680 spécifie les exigences de sécurité et les vérifications requises pour la conception et la construction des perches élagueuses à moteur portatives (appelées perches élagueuses dans le texte), tenues à la main, équipées d'une source motrice portée à dos et fonctionnant avec un arbre de transmission ou un entraînement hydraulique pour alimenter le dispositif de coupe. Les dispositifs de coupe couverts sont les chaînes de scies, les lames de scie circulaires et les lames alternatives. La présente partie de l'ISO 11680 décrit les méthodes pour éliminer ou réduire les phénomènes dangereux inhérents à l'utilisation des perches élagueuses. En outre, elle spécifie le type d'informations que le fabricant doit donner sur les pratiques d'utilisation sûre. Elle ne spécifie cependant pas de mesures techniques permettant de réduire les risques liés au contact ou à la proximité de lignes électriques aériennes, en dehors des avertissements et conseils donnés dans la notice d'instructions. Une méthode d'essai et des exigences de sécurité traitant de ce type de risque reste encore à élaborer. La liste des phénomènes dangereux significatifs, nécessitant une action pour réduire le risque, est donnée à l'annexe A. Les aspects liés à l'environnement ne sont pas couverts. La présente partie de l'ISO 11680 s'applique avant tout aux perches élagueuses fabriquées après sa date de publication.
Gozdarski stroji - Zahteve za varnost in preskušanje motornih žag za obvejevanje z drogom - 2. del: Stroji z nahrbtnim pogonom (ISO 11680-2:2000)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11680-2:2009
01-maj-2009
1DGRPHãþD
SIST EN ISO 11680-2:2001
SIST EN ISO 11680-2:2001/AC:2004
Gozdarski stroji - Zahteve za varnost in preskušanje motornih žag za obvejevanje z
drogom - 2. del: Stroji z nahrbtnim pogonom (ISO 11680-2:2000)
Machinery for forestry - Safety requirements and testing for pole-mounted powered
pruners - Part 2: Units for use with a back-pack power source (ISO 11680-2:2000)
Forstmaschinen - Sicherheitstechnische Anforderungen und Prüfung für motorbetriebene
Hochentaster - Teil 2: Geräte mit rückengetragener Antriebseinheit (ISO 11680-2:2000)
Matériel forestier - Exigences de sécurité et essais pour les perches élagueuses à
moteur - Partie 2: Machines pour utilisation avec une source motrice portée à dos (ISO
11680-2:2000)
Ta slovenski standard je istoveten z: EN ISO 11680-2:2008
ICS:
65.060.80 Gozdarska oprema Forestry equipment
SIST EN ISO 11680-2:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11680-2:2009
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SIST EN ISO 11680-2:2009
EUROPEAN STANDARD
EN ISO 11680-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2008
ICS 65.060.80
English Version
Machinery for forestry - Safety requirements and testing for pole-
mounted powered pruners - Part 2: Units for use with a back-
pack power source (ISO 11680-2:2000)
Matériel forestier - Exigences de sécurité et essais pour les Forstmaschinen - Sicherheitstechnische Anforderungen
perches élagueuses à moteur - Partie 2: Machines pour und Prüfung für motorbetriebene Hochentaster - Teil 2:
utilisation avec une source motrice portée à dos (ISO Geräte mit rückengetragener Antriebseinheit (ISO 11680-
11680-2:2000) 2:2000)
This European Standard was approved by CEN on 15 October 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11680-2:2008: E
worldwide for CEN national Members.
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SIST EN ISO 11680-2:2009
EN ISO 11680-2:2008 (E)
Contents Page
Foreword.3
Annex ZA (Informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .5
2
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SIST EN ISO 11680-2:2009
EN ISO 11680-2:2008 (E)
Foreword
The text of ISO 11680-2:2000 has been prepared by Technical Committee ISO/TC 23 “Tractors and
machinery for agriculture and forestry” of the International Organization for Standardization (ISO) and has
been taken over as EN ISO 11680-2:2008 by 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 May 2009, and conflicting national standards shall be withdrawn at the
latest by December 2009.
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 11680-2:2000.
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 EC Directives.
For relationship with EC Directives, see informative Annexes ZA and ZB, which are 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, 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 11680-2:2000 has been approved by CEN as a EN ISO 11680-2:2008 without any
modification.
3
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SIST EN ISO 11680-2:2009
EN ISO 11680-2:2008 (E)
Annex ZA
(Informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC on machinery, amended by the New Approach Directive 98/79/EC.
Once this standard is cited in the Official Journal of the European Communities 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 except Essential Requirements 1.5.9 limited to backpack power
source and 1.2.7 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.
4
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SIST EN ISO 11680-2:2009
EN ISO 11680-2:2008 (E)
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a 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 Communities 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 except Essential Requirements 1.2.1 fourth indent and second
paragraph, third indent, 1.5.9 limited to backpack power source, 1.7.3 first paragraph, first and second
indents, 1.7.4.2 q), t) and u) fourth paragraph second indent and 2.2.1.1 first paragraph second indent 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.
5
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SIST EN ISO 11680-2:2009
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SIST EN ISO 11680-2:2009
INTERNATIONAL ISO
STANDARD 11680-2
First edition
2000-08-01
Machinery for forestry — Safety
requirements and testing for pole-mounted
powered pruners —
Part 2:
Units for use with a back-pack power
source
Matériel forestier — Exigences de sécurité et essais pour les perches
élagueuses à moteur —
Partie 2: Machines pour utilisation avec une source motrice portée à dos
Reference number
ISO 11680-2:2000(E)
©
ISO 2000
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
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ii © ISO 2000 – All rights reserved
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Safety requirements .4
4.1 General.4
4.2 Noise .4
4.3 Vibration .4
4.4 Hand-grips.5
4.5 Harness.5
4.6 Hydraulic components .5
4.7 Power-driven components.6
4.8 Cutting attachment .6
4.9 Transport guard for cutting attachment.7
4.10 Distance to cutting attachment .7
4.11 Back-pack power unit.7
5 Verification of safety requirements.8
6 Information for the operator .8
6.1 General.8
6.2 Technical data.9
6.3 Instruction handbook .9
6.4 Marking .11
Annex A (normative) List of hazards.12
Annex B (normative) Warning symbol for overhead electric-power lines .15
Annex C (informative) Ergonomic design.16
Bibliography.17
© ISO 2000 – All rights reserved iii
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(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 3.
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 part of ISO 11680 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 11680-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for
agriculture and forestry, Subcommittee SC 17, Manually portable forest machinery.
ISO 11680 consists of the following parts, under the general title Machinery for forestry — Safety requirements and
testing for pole-mounted powered pruners:
� Part 1: Units fitted with an integral combustion engine
� Part 2: Units for use with a back-pack power unit
Annexes A and B form a normative part of this part of ISO 11680. Annex C is for information only.
For the purposes of this part of ISO 11680, the CEN annex regarding fulfilment of European Council Directives has
been removed.
iv © ISO 2000 – All rights reserved
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
Introduction
The extent to which hazards are covered is indicated in the scope of this part of ISO 11680. In respect of hazards
not covered by this part of ISO 11680, it is intended that machinery comply as appropriate with ISO/TR 12100.
Certain noise- and vibration-reduction measures are covered in this part of ISO 11680 for the type of machinery
concerned. It is the intention of ISO/TC 23/SC 17 to collect noise and vibration values for each forestry-machine
type in accordance with relevant measurement standards. These values will be used to define the “state of the art”
levels based on principles to be established by SC 17. The interaction of noise and vibration on the machine
characteristics will be assessed, and the relationship between “state of the art” values and exposure limits
considered.
© ISO 2000 – All rights reserved v
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SIST EN ISO 11680-2:2009
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SIST EN ISO 11680-2:2009
INTERNATIONAL STANDARD ISO 11680-2:2000(E)
Machinery for forestry — Safety requirements and testing
for pole-mounted powered pruners —
Part 2:
Units for use with a back-pack power source
1 Scope
This part of ISO 11680 specifies safety requirements, and the verification of those requirements, for the design,
fabrication and use of portable, hand-held, pole-mounted powered pruners with a back-pack power unit, using a
drive shaft to transmit power to cutting attachments. The cutting attachments covered are saw chains, and
reciprocating and circular saw blades.
This part of ISO 11680 describes methods for the elimination or reduction of hazards arising from their use. In
addition it specifies the type of information on safe working practices to be provided by the manufacturer. It does
not cover the risk of electric shock from overhead electric power lines during use of the pruners, with the exception
of warnings and advice intended for inclusion in instruction handbooks. A test method and safety requirements
addressing this risk are yet to be developed.
The list of significant hazards which require action to reduce the risk is given in annex A.
Environmental aspects have not been considered.
This part of ISO 11680 applies primarily to pruners manufactured after its date of issue.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 11680. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 11680 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 3767-5:1992, 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 machinery.
ISO 6531:1999, Machinery for forestry — Portable hand-held chain-saws — Vocabulary.
ISO 7112:1999, Machinery for forestry — Portable hand-held brush-cutters and grass-trimmers — Vocabulary.
ISO 7113:1999, Portable hand-held forestry machines — Cutting attachments for brush cutters — Single-piece
metal blades.
ISO 8893:1997, Forestry machinery — Portable brush-cutters and grass-trimmers — Engine performance and fuel
consumption.
© ISO 2000 – All rights reserved 1
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
ISO 11680-1:2000, Machinery for forestry — Safety requirements and testing for pole-mounted powered pruners —
Part 1: Units fitted with an integral combustion engine.
ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Safety
signs and hazard pictorials — General principles.
ISO/TR 12100-1:1992, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
1)
terminology, methodology.
ISO/TR 12100-2:1992, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical
2)
principles and specifications.
ISO 13852:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the upper
3)
limbs.
ISO 14740:1998, Forest machinery — Backpack power units for brush-cutters, grass-trimmers, pole-cutters and
similar appliances — Safety requirements and testing.
3 Terms and definitions
For the purposes of this part of ISO 11680, the following terms and definitions apply.
3.1
pole-mounted powered pruner
pruner
portable, hand-held machine fitted with a cutting attachment mounted on a pole to enable an operator to cut the
branches of standing trees
NOTE See example, Figure 1.
3.2
unit
complete machine including power source, drive shaft, cutting attachment and guard, but excluding harness
3.3
cutting attachment
cutting device in the form of a reciprocating blade, circular saw blade with its retainer, or saw chain with its guide
bar
3.4
handgrip
part of the machine designed to be held by the operator to enable the unit to be manœuvred
3.5
back-pack power source
combustion engine power source designed to be mounted on the operator’s back by means of a supporting frame
1) Equivalent to EN 292-1:1991.
2) Equivalent to EN 292-2:1991.
3) Equivalent to EN 294:1992.
2 © ISO 2000 – All rights reserved
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
Key
1 Back-pack mounted combustion engine
2 Harness for back-pack power unit
3 Rear hand-grip
4 Harness for tool support
5 Front hand-grip
6 Outer shaft tube
7 Cutting attachment
Figure 1 — Pole-mounted powered pruner with back-pack and saw-chain cutting attachment
© ISO 2000 – All rights reserved 3
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
4 Safety requirements
4.1 General
The safe operation of the pole-mounted powered pruner (hereafter called pruner) shall depend not only on the
following safety requirements, but also on the safe environment associated with the use of personal-protection
equipment (PPE) such as gloves, slip-resistant footwear, and eye-, ear- and head-protection equipment.
Annex C gives certain ergonomic factors that should be taken in account.
4.2 Noise
4.2.1 Reduction by design and protective measures
The pruner shall be designed to generate a noise level as low as practicable. The main sources of noise from
combustion-engine-driven pruners are the following:
� air intake system,
� engine cooling system,
� engine exhaust system,
� cutting system,
� vibrating surfaces.
[1]
ISO/TR 11688-1 gives general technical information on widely recognized technical rules and means to be
followed in the design of machines with low-noise emission. In the case of combustion-engine driven machines,
special care shall be taken in the design of the exhaust system and selection of the silencer.
[2] [3]
NOTE ISO 11691 and ISO 11820 can be used for the testing of the silencer.
4.2.2 Reduction by information
In addition to technical measures for noise reduction, the instruction handbook accompanying the pruner shall
include:
� recommendation for limiting duration of operation, as appropriate;
� a warning of noise level with recommendation of the use of ear protection.
4.2.3 Noise measurement
For the measurement of sound power and sound pressure at the operator’s position the methods given in annex B
of ISO 11680-1 shall be used. These sound levels shall be measured for each combination of back-pack power unit
and powered pruner as recommended by the pruner manufacturer.
4.3 Vibration
4.3.1 Reduction by design and protective measures
The pruner shall be designed to generate a vibration level as low as practicable. The main sources of vibration are:
� oscillating forces from the motor;
4 © ISO 2000 – All rights reserved
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
� cutting parts;
� unbalanced moving parts;
� impact in gears, bearings and other mechanisms;
� interaction between operator, machine and material being worked.
In addition to measures to reduce vibration at source, technical measures such as isolators and resonating masses
shall be used to isolate, when appropriate, the vibration source from the hand-grip.
NOTE Technical information on widely recognized technical rules and means to be followed in the design of machines for
[4]
low hand-arm vibration solutions is given in a variety of publications such as CEN CR 1030-1:1995 .
4.3.2 Reduction by information
In addition to all possible technical measures for vibration reduction, the instruction handbook shall recommend:
� limiting the duration of operation, as appropriate;
� the wearing of PPE such as gloves.
4.3.3 Vibration measurement
For the determination of hand-arm vibration the method given in annex C of ISO 11680-1 shall be used.
NOTE There may be significant vibration transmitted to the operator's body from the power source through the back-pack
power-unit harness. This is not covered by this part of ISO 11680. There is no measuring method currently available.
4.4 Hand-grips
The pruner shall have a hand-grip for each hand. The shape and surface of the hand-grips shall be designed to
provide the necessary sureness of grip: this shall also apply when the operator is wearing gloves. If the hand-grip
nearest the cutting attachment is an integrated part of the shaft tube, its periphery shall be within the diameters of
25 mm min and 50 mm max. The hand-grip length shall be at least 100 mm.
The gripping length of a bail or closed hand-grip shall comprise any length that is straight or curved at a radius
greater than 100 mm together with any blend radius, but not more than 10 mm at either or both ends of the gripping
surface.
NOTE If the shaft tube is used as a hand-grip, the entire shaft tube length can be considered as the grip area. The strength
of the hand-grip is to be considered in a future revision of this part of ISO 11680.
4.5 Harness
A harness to support of the tools shall be provided for all pruners. It shall be designed so that it can be quickly
released by the operator.
If combined with the harness for the back-pack power unit, it shall meet the requirements of ISO 14740.
4.6 Hydraulic components
Components subject to pressures in excess of 500 kPa shall be designed or protected to prevent operator injury
resulting from the loss of fluid in the event of a pressure leak. For this protection, the components may be mounted
inside the shaft tubes.
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SIST EN ISO 11680-2:2009
ISO 11680-2:2000(E)
4.7 Power-driven components
All power-driven components, except for the cutting attachments, shall be guarded to prevent operator contact with
these parts.
For openings, the requirements of 4.5.2 and 4.5.3 of ISO 13852:1996 shall be met.
4.8 Cutting attachment
4.8.1 Tools
If special tools are necessary to replace the cutting attachments, they shall be supplied with the pruner.
4.8.2 Saw-chain-cutting attachment
A saw-chain-cutting attachment shall be provided with means of adjustment to provide chain tension according to
the manufacturer’s recommendation.
A fixed guard shall be provided, enclosing the exposed sides of the drive sprocket.
The means shall be provided to lubricate the saw chain, either automatically or manually. If a manual oiler is
provided, it shall be located so that it can be operated while holding the pruner by both hand-grips.
4.8.3 Circular-saw-blade cutting attachment
4.8.3.1 A circular saw blade shall be a single-piece blade in accordance with the specifications for blade
surface quality and blade material given in ISO 7113.
4.8.3.2 The mounting of a cutting attachment shall not show any relative motion between the cutting
attachment and the retainer or the shaft on which it is mounted, when tested as follows:
a) install the cutting attachment according to the manufacturer’s instructions;
b) lock the power transmission shaft;
c) apply a rotational torque, M, to the cutting attachment, the value of which is
M=0,4� V� k
where
M is the torque, in Newton metres;
V is the engine displacement, in cubic centimetres;
k is the gear ratio, or the engine rotational frequency divided by the cutting attachment rotational frequency.
The test shall be conducted five times in the direction of normal rotation, then five times in the opposite direction.
4.8.3.3 A guard shall be provided for any cutting attachment incorporating a circular saw blade. This guard
shall protect the operator from ejected particles.
NOTE A guard strength te
...
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