ISO/FDIS 11681-1

Machinery for forestry -- Portable chain-saw safety requirements and testing

Matériel forestier -- Exigences de sécurité et essais des scies à chaîne portatives

General Information

• Status: Published
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: ISO/TC 23/SC 17 - Manually portable (hand-held) powered lawn and garden equipment and forest machinery
• Drafting Committee: ISO/TC 23/SC 17/WG 4 - Safety
• Current Stage: 5092 - FDIS referred back to TC or SC
• Start Date: 11-Jun-2021

RELATIONS

• Revised: ISO 11681-1:2011 - Machinery for forestry -- Portable chain-saw safety requirements and testing
• Effective Date: 21-Oct-2017

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 11681-1
ISO/TC 23/SC 17
Machinery for forestry — Portable
Secretariat: SIS
chain-saw safety requirements and
Voting begins on:
2020-04-08 testing —
Voting terminates on:
Part 1:
2020-06-03
Chain-saws for forest service
Matériel forestier — Exigences de sécurité et essais des scies à chaîne
portatives —
Partie 1: Scies à chaîne pour travaux forestiers
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 11681-1:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
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ISO/FDIS 11681-1:2020(E)
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ii © ISO 2020 – All rights reserved
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ISO/FDIS 11681-1:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 2

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Safety requirements and/or protective measures ............................................................................................................ 3

4.1 General ........................................................................................................................................................................................................... 3

4.2 Handles .......................................................................................................................................................................................................... 3

4.2.1 Requirements ..................................................................................................................................................................... 3

4.2.2 Verification ............................................................................................................................................................................ 3

4.3 Hand protection ..................................................................................................................................................................................... 3

4.3.1 Protection at front handle ........................................................................................................................................ 3

4.3.2 Protection at the rear handle ................................................................................................................................ 4

4.4 Balance ........................................................................................................................................................................................................... 4

4.4.1 Requirements ..................................................................................................................................................................... 4

4.4.2 Verification ............................................................................................................................................................................ 5

4.5 Protection against injury by kickback ................................................................................................................................. 5

4.5.1 Chain brake ........................................................................................................................................................................... 5

4.5.2 Non-manual chain brake ........................................................................................................................................... 5

4.5.3 Kickback and chain stop angles .......................................................................................................................... 5

4.6 Chain catcher ............................................................................................................................................................................................ 6

4.6.1 Requirements ..................................................................................................................................................................... 6

4.6.2 Verification ............................................................................................................................................................................ 6

4.7 Spiked bumper ........................................................................................................................................................................................ 6

4.7.1 Requirements ..................................................................................................................................................................... 6

4.7.2 Verification ............................................................................................................................................................................ 6

4.8 Chip discharge ......................................................................................................................................................................................... 6

4.8.1 Requirements ..................................................................................................................................................................... 6

4.8.2 Verification ............................................................................................................................................................................ 6

4.9 Guide bar cover ....................................................................................................................................................................................... 6

4.9.1 Requirements ..................................................................................................................................................................... 6

4.9.2 Verification ............................................................................................................................................................................ 6

4.10 Engine starting device ...................................................................................................................................................................... 6

4.10.1 Requirements ..................................................................................................................................................................... 6

4.10.2 Verification ............................................................................................................................................................................ 7

4.11 Engine stopping device .................................................................................................................................................................... 7

4.11.1 Requirements ..................................................................................................................................................................... 7

4.11.2 Verification ............................................................................................................................................................................ 7

4.12 Throttle control system ................................................................................................................................................................... 7

4.12.1 Dimensions ........................................................................................................................................................................... 7

4.12.2 Operation ................................................................................................................................................................................ 7

4.12.3 Throttle control latch ................................................................................................................................................... 8

4.13 Drive sprocket guard.......................................................................................................................................................................... 9

4.13.1 Requirements ..................................................................................................................................................................... 9

4.13.2 Verification ............................................................................................................................................................................ 9

4.14 Clutch............................................................................................................................................................................................................10

4.14.1 Requirements ..................................................................................................................................................................10

4.14.2 Verification .........................................................................................................................................................................10

4.15 Protection against contact with parts under high voltage .............................................................................10

4.15.1 Requirements ..................................................................................................................................................................10

4.15.2 Verification .........................................................................................................................................................................10

4.16 Protection against contact with hot parts ....................................................................................................................10

4.16.1 Requirements ..................................................................................................................................................................10

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ISO/FDIS 11681-1:2020(E)

4.16.2 Verification .........................................................................................................................................................................12

4.17 Fuel and oil systems ........................................................................................................................................................................13

4.17.1 Requirements ..................................................................................................................................................................13

4.17.2 Verification .........................................................................................................................................................................13

4.18 Exhaust gases ........................................................................................................................................................................................14

4.18.1 Requirements ..................................................................................................................................................................14

4.18.2 Verification .........................................................................................................................................................................14

4.19 Chain lubrication ................................................................................................................................................................................14

4.19.1 Requirements ..................................................................................................................................................................14

4.19.2 Verification .........................................................................................................................................................................14

4.20 Chain tensioning .................................................................................................................................................................................15

4.20.1 Requirements ..................................................................................................................................................................15

4.20.2 Verification .........................................................................................................................................................................15

4.21 Vibration ....................................................................................................................................................................................................15

4.21.1 Reduction by design at source and by protective measures ...................................................15

4.21.2 Vibration measurement ..........................................................................................................................................15

4.22 Noise .............................................................................................................................................................................................................15

4.22.1 Reduction by design at source and by protective measures ...................................................15

4.22.2 Noise measurement ...................................................................................................................................................15

4.23 Electromagnetic immunity ........................................................................................................................................................16

4.23.1 Requirements ..................................................................................................................................................................16

4.23.2 Verification .........................................................................................................................................................................16

5 Information for use .........................................................................................................................................................................................16

5.1 Instructions .............................................................................................................................................................................................16

5.1.1 General...................................................................................................................................................................................16

5.1.2 Technical data ..................................................................................................................................................................16

5.1.3 Other information ........................................................................................................................................................16

5.2 Marking ......................................................................................................................................................................................................19

5.3 Warnings ...................................................................................................................................................................................................20

5.4 Test of labels ...........................................................................................................................................................................................20

5.4.1 Preparation of test specimens and control specimens ................................................................20

5.4.2 Wipe resistance test ...................................................................................................................................................21

5.4.3 Adhesion test .................. .................................................... ..............................................................................................21

Annex A (informative) List of significant hazards................................................................................................................................22

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of EU Directive 2006/42/EC aimed to be covered ....................................................................24

Bibliography .............................................................................................................................................................................................................................26

iv © ISO 2020 – All rights reserved
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ISO/FDIS 11681-1:2020(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 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 fourth edition cancels and replaces the third edition (ISO 11681-1:2011), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— the normative references in Clause 2 have been updated;
— requirements for kickback in 4.5.3.1 have been clarified;

— requirements and verification for throttle control system in 4.12 have been updated;

— a new subclause, 4.17.2.3 “Fuel feed lines strength and accessibility” has been added;

— 5.1.2 “Technical data”, has been updated;
— in 5.1.3, information on safe starting procedure has been added.
A list of all parts in the ISO 11681 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.
© ISO 2020 – All rights reserved v
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ISO/FDIS 11681-1:2020(E)
Introduction
This document is a type-C standard as stated in ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety: players with regard to machinery safety:

— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, 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 © ISO 2020 – All rights reserved
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 11681-1:2020(E)
Machinery for forestry — Portable chain-saw safety
requirements and testing —
Part 1:
Chain-saws for forest service
1 Scope

This document specifies safety requirements and measures for verification for the design, construction,

transporting and commissioning of portable, combustion-engine, hand-held chain-saws. The chain-

saws are intended to be used for forest work by only one operator, with the right hand on the rear

handle and left hand on the front handle.

Dismantling and scrapping of the product is not covered by this document. 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, with

the exception of kickback and balance for machines with an engine displacement of more than 80 cm ,

relevant to these machines when they are used as intended and under conditions of misuse which are

reasonably foreseeable by the manufacturer (see Annex A).

This document is applicable to chain-saws manufactured after its date of publication.

NOTE Figure 1 shows an example of a chain-saw within the scope of this document.
Key
1 rear hand guard 7 spiked bumper
2 rear handle 8 guide-bar cover
3 throttle trigger 9 guide-bar
4 throttle trigger lock-out 10 saw-chain
5 front handle 11 chain catcher
6 front hand-guard
Figure 1 — Example of chain-saw
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ISO/FDIS 11681-1:2020(E)
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 6531, Machinery for forestry — Portable chain-saws — Vocabulary

ISO 6533, Forestry machinery — Portable chain-saw front hand-guard — Dimensions and clearances

ISO 6534, Forestry machinery — Portable chain-saw hand-guards — Mechanical strength

ISO 6535, Portable chain-saws — Chain brake performance

ISO 7293, Forestry machinery — Portable chain saws — Engine performance and fuel consumption

ISO 7914, Forestry machinery — Portable chain-saws — Minimum handle clearance and sizes

ISO 7915, Forestry machinery — Portable chain-saws — Determination of handle strength

ISO 8334, Forestry machinery — Portable chain-saws — Determination of balance and maximum

holding moment
ISO 9518, Forestry machinery — Portable chain-saws — Kickback test

ISO 10726, Portable chain saws — Chain catcher — Dimensions and mechanical strength

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 13772, Forestry machinery — Portable chain-saws — Non-manually actuated chain brake performance

ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design

ISO 13849-2, Safety of machinery — Safety-related parts of control systems — Part 2: Validation

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, 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 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 6531 and ISO 12100 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
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ISO/FDIS 11681-1:2020(E)
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 document.

The safe operation of a chain-saw also depends on the safe environment associated with the use of

personal protective equipment (PPE), such as gloves, slip-resistant footwear, and leg, eye, foot, hearing

and head protective equipment, as well as safe working procedures (see 5.1).

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.
4.2 Handles
4.2.1 Requirements

Chain-saws shall have a handle for each hand. These handles shall be designed such that:

— they can be fully gripped by an operator wearing protective gloves,
— they provide the necessary sureness of grip by their shaping and surface,

— they conform to the dimensions and clearances given in ISO 7914 (see also 4.12.1), and

— the strength of both handles shall comply with ISO 7915.

Chain-saws having a system for isolating machine vibration from the handles shall be designed so that

the operator is able to stop the engine in a controlled manner with the engine stopping device (see

4.11), even in the case of failure of the vibration isolation system.
4.2.2 Verification

Dimensions shall be verified by measurement. Strength requirements shall be verified by testing in

...