prEN ISO 19472-1

Machinery for forestry - Winches - Part 1: Dimensions, performance and safety (ISO/DIS 19472-1:2026)

This document stipulates measures as well as requirements in respect to performance and safety for winches that are used in agriculture and forestry for logging and skidding work.
It applies to permanently mounted and removable winches and their components, which are mounted on mobile and self-propelled forestry machines as defined in ISO 6814:2009, as well as to winches for forestry mounted on agricultural tractors that are used for forestry work. The document also applies to capstan winches and winches using driving sheaves or driving pulleys for forestry.
It does not apply to winches:
—      that are used for hoisting or lifting operations;
—      that are used in draglines;
—      that are used in in yarders, unless winches according to 5.17;
—      designed for traction aid purposes;
—      using operating and control voltages > 42 V;
—      that are used with log splitters according to EN 609-1.
It applies exclusively to winches that are used for dragging loads on horizontal and inclined ground during logging operations or which are used to support tree felling work.
The significant hazards included in this document are identified in Annex A.
This document is not applicable to winches manufactured before the date of its publication.

Maschinen für die Forstwirtschaft - Winden - Abmessungen, Leistung und Sicherheit (ISO/DIS 19472‑1:2026)

Matériels forestiers - Treuils - Partie 1: Dimensions, performance et sécurité (ISO/DIS 19472-1:2026)

Gozdarski stroji - Vitli - 1. del: Mere, zmogljivost in varnost (ISO/DIS 19472-1:2026)

Ta dokument določa ukrepe in zahteve glede zmogljivosti in varnosti za vitla, ki se uporabljajo v kmetijstvu in gozdarstvu za spravilo in vleko lesa.
Velja za stalno nameščena in odstranljiva vitla ter njihove komponente, ki so nameščene na mobilnih in samohodnih gozdarskih strojih, kot so opredeljeni v ISO 6814:2009, ter za gozdarska vitla, nameščena na kmetijskih traktorjih, ki se uporabljajo za gozdarska dela. Dokument velja tudi za kapstanska vitla in vitla, ki uporabljajo pogonske škripce ali pogonske jermenice za gozdarstvo.
Ne velja za vitla:
- ki se uporabljajo za dviganje ali dvigovalne operacije;
- ki se uporabljajo v vlečnih linijah;
- ki se uporabljajo v žičnicah, razen vitel v skladu s točko 5.17;
- zasnovana za namene pomoči pri vleki;
- ki uporabljajo obratovalne in krmilne napetosti > 42 V;
- ki se uporabljajo z cepilniki lesa v skladu z EN 609-1.
Velja izključno za vitla, ki se uporabljajo za vleko bremen po vodoravnem in nagnjenem terenu med spravilom lesa ali ki se uporabljajo za podporo pri podiranju dreves.
Pomembne nevarnosti, vključene v ta dokument, so opredeljene v Prilogi A.
Ta dokument ne velja za vitla, izdelana pred datumom njegove objave.

General Information

• Status: Not Published
• Publication Date: 19-Oct-2027
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 8 - Forestry machinery
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 26-Mar-2026
• Due Date: 27-Dec-2025
• Completion Date: 26-Mar-2026
• Directive: Harmonized Standard2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive:

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  Not Harmonized2023/1230 - Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery and repealing Directive 2006/42/EC of the European Parliament and of the Council and Council Directive 73/361/EEC (Text with EEA relevance)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/605 - COMMISSION IMPLEMENTING DECISION of 20.1.2025 on a standardisation request to the European Committee for Standardization and to the European Committee for Electrotechnical Standardization as regards machinery and related products in support of Regulation (EU) 2023/1230 of the European Parliament and of the Council
• Ref Project: oSIST prEN ISO 19472-1:2026 - Machinery for forestry - Winches - Part 1: Dimensions, performance and safety (ISO/DIS 19472-1:2026)

Overview

prEN ISO 19472-1:2026 sets out essential requirements for the dimensions, performance, and safety of winches used in forestry and agricultural logging operations. Published by CEN and aligned with ISO standards, this document applies to both permanently mounted and removable winches on mobile or self-propelled forestry machines, as well as forestry winches mounted on agricultural tractors. The standard also addresses capstan winches and winches using driving sheaves or pulleys, focusing exclusively on those used for dragging loads during logging, skidding, and support for tree felling on horizontal or inclined ground.

This standard aims to minimize significant hazards associated with winch operations and is applicable only to winches manufactured after its publication.

Key Topics

prEN ISO 19472-1 covers a wide range of safety and performance considerations for forestry winches, including:

• Winch Types and Scope: Applicability to forestry winches, both portable and mounted versions, including those using rope drums, capstans, or pulleys.
• Performance Requirements: Specifications regarding rated line pull, rope capacity, rope deflection angles, spool quality, and mechanical strength.
• Safety Measures:
  • Protection of operators from moving parts and flying debris
  • Mechanical safety features such as shields, guards, and brake performance
  • Overload protection mechanisms
  • Ergonomics of controls and safe control panel layouts
  • Emergency stop functions and remote control safety
  • Requirements for hydraulic and electrical equipment, including electromagnetic compatibility (EMC)
• Testing and Compliance: Procedures for verifying performance and safety features, and guidelines for documentation, marking, and operator manuals.
• Exclusions: Winches used for hoisting, lifting, draglines, traction aids, high-voltage systems, or with certain log splitter applications.
• Terminology: Standardized definitions related to winch structure, function, and safety devices for clarity and global consistency.

Applications

This standard is crucial for a range of forestry and agricultural stakeholders, including:

• Machine Manufacturers: Ensures that newly manufactured winches for forestry work are designed for optimal safety and compliance with European and international regulations.
• Forestry Operators and Loggers: Provides assurance that equipment for skidding, dragging, and supporting tree felling is tested for operator safety and robust performance under typical working conditions.
• Tractor and Equipment Dealers: Facilitates procurement and marketing of compliant winching solutions that meet the latest industry benchmarks.
• Maintenance Providers: Supports best practices for winch installation, routine checks, documentation, and replacement of components to maintain operational safety.
• Regulators and Health & Safety Bodies: Offers a clear basis for equipment approval, inspections, and compliance with EU machinery regulations.

Related Standards

The scope of prEN ISO 19472-1 is closely related to several other international standards, many of which are referenced within the document:

• ISO 6814:2009 - Terms and classification for forestry machinery.
• ISO 4254-1:2013 - General safety requirements for agricultural machinery.
• ISO 3600:2022 - Content and format of operator's manuals.
• ISO 12100:2010 - General design principles for machinery safety and risk reduction.
• ISO 14120:2015 - Design and construction of machine guards.
• EN 17067:2018 - Safety requirements for remote controls in forestry machinery.
• EN 17822:2023 - Sling gear and deflection pulleys for forest operations.

By following prEN ISO 19472-1, stakeholders enhance workplace safety, simplify compliance with EU regulations, and ensure interoperability and reliability of forestry winch equipment across international markets.

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Tags: forestry winches, winch safety standard, logging winches, skidding equipment, forestry machinery standards, prEN ISO 19472-1, CEN winch requirements, operator safety, forestry equipment compliance

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Gozdarski stroji - Vitli - 1. del: Mere, zmogljivost in varnost (ISO/DIS 19472-1:2026)
Machinery for forestry - Winches - Part 1: Dimensions, performance and safety (ISO/DIS
19472-1:2026)
Maschinen für die Forstwirtschaft - Winden - Abmessungen, Leistung und Sicherheit
(ISO/DIS 19472-1:2026)
Matériels forestiers - Treuils - Partie 1: Dimensions, performance et sécurité (ISO/DIS
19472-1:2026)
Ta slovenski standard je istoveten z: prEN ISO 19472-1
ICS:
65.060.80 Gozdarska oprema Forestry equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 19472-1
ISO/TC 23/SC 15
Machinery for forestry —
Secretariat: SFS
Winches —
Voting begins on:
Part 1: 2026-03-24
Dimensions, performance and
Voting terminates on:
2026-06-16
safety
Matériels forestiers — Treuils —
Partie 1: Dimensions, performance et sécurité
ICS: 65.060.80
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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 SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 19472-1:2026(en)
DRAFT
ISO/DIS 19472-1:2026(en)
International
Standard
ISO/DIS 19472-1
ISO/TC 23/SC 15
Machinery for forestry —
Secretariat: SFS
Winches —
Voting begins on:
Part 1:
Dimensions, performance and
Voting terminates on:
safety
Matériels forestiers — Treuils —
Partie 1: Dimensions, performance et sécurité
ICS: 65.060.80
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
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or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
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RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 19472-1:2026(en)
ii
ISO/DIS 19472-1:2026(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Symbols, measures and calculations. 7
4.1 Symbols .7
4.2 Safety overhang .9
4.3 Calculations .10
4.3.1 Rope capacity .10
4.3.2 Line pull .11
4.3.3 Rope entering speed . . . 12
5 Safety requirements and/or protection measures as well as performance requirements .13
5.1 General . 13
5.2 Line pull and rope deflection . 13
5.2.1 Ensuring sufficient line pull . 13
5.2.2 Rope deflection angle . 13
5.3 Mechanical safety . 13
5.3.1 Safety distances . 13
5.3.2 Guards and shields . .14
5.3.3 Securing power-operated parts . .14
5.3.4 Guards .14
5.3.5 Protection of the operator from hazards created by the rope . 15
5.3.6 Protection of the operator from hazards during coupling and uncoupling . 15
5.3.7 Means for proper spooling . 15
5.3.8 Guard against parts flung back .16
5.3.9 Devices for connecting choker chains to the shield or the body of the winch .18
5.4 Hydraulic equipment .18
5.5 Rope drum .18
5.6 Ropes and rope drives .19
5.6.1 General .19
5.6.2 Pulleys.19
5.6.3 Guide rollers and pressure rollers .19
5.6.4 Rope fastening . 20
5.6.5 Rope guides/Rope runs . 20
5.6.6 Rope end connectors . 20
5.6.7 Sling gear / Fastening gear .21
5.7 Brake .21
5.7.1 General .21
5.7.2 Holding capacity .21
5.7.3 Brake activation .21
5.7.4 Brake performance . 22
5.7.5 Brake release . 22
5.7.6 Unspooling . 22
5.8 Controls . 22
5.8.1 Safety related control functions . 22
5.8.2 Control layout for hazardous winch movements . . 22
5.8.3 Positioning and marking of controls . 23
5.8.4 Ergonomics of controls . 23
5.8.5 Layout of control panels . 23
5.8.6 Software . 23
5.8.7 Rope controls .24
5.8.8 Stop of the prime mover.24

iii
ISO/DIS 19472-1:2026(en)
5.8.9 Remote controls .24
5.8.10 Functional testing of controls .24
5.9 Pressure limiting valves . 25
5.10 Emergency stop function . 25
5.10.1 General . 25
5.10.2 Control from within a cab . 25
5.10.3 Rope controlled winches . 25
5.10.4 Winches with an integrated prime mover . 25
5.11 Electrical equipment . 26
5.11.1 Electromagnetic compatibility . 26
5.11.2 Protection class of housings for operation in the open air . 26
5.11.3 Temperature range . 26
5.12 Clutches . 26
5.13 Overload protection (pulling) .27
5.13.1 General .27
5.13.2 Special requirements for slipping clutches .27
5.14 Stability .27
5.15 Fire risks . 28
5.16 Noise . 28
5.17 Divergent requirements for implement support winches used with log loading cranes,
excavator arms and logging grapples . 28
5.18 Winches used to support unspooling and positioning of other winch ropes . 29
5.19 Additional requirements for capstan winches and winches with driven sheaves or
pulleys for forestry and for portable winches . 30
5.19.1 General . 30
5.19.2 Portable winches .31
5.20 Testing .32
6 Information for use .32
6.1 Instruction handbook.32
6.2 Marking . 34
6.3 Warnings . 36
Annex A (informative) List of significant hazards .37
Annex B (informative) Test report according ISO 19472-1 .39
Annex C (normative) Hazard areawinch operation abovewinch assisted felling below . 41
Annex D (normative) Overload test .43
Annex E (normative) Noise test code .44
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2023/1230 aimed to be covered .46
Bibliography .48

iv
ISO/DIS 19472-1:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation 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 15, Machinery for forestry.
A list of all parts in the ISO 19472 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
ISO/DIS 19472-1:2026(en)
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:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.)
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e. g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous events are
covered are indicated in the scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or type-B
standards, the requirements of this type-C standard take precedence over the requirements of the other
standards for machines that have been designed and built according to the requirements of this type-C
standard.
vi
DRAFT International Standard ISO/DIS 19472-1:2026(en)
Machinery for forestry — Winches —
Part 1:
Dimensions, performance and safety
1 Scope
This document specifies requirements with respect to performance and safety for winches that are used in
forestry and agriculture for logging and skidding work.
It applies to permanently mounted and removable winches and their components, which are mounted on
mobile and self-propelled forestry machines as defined in ISO 6814:2009, as well as to winches for forestry
mounted on agricultural tractors or other implements that are used for forestry work. This document also
applies to capstan winches and winches using driving sheaves or driving pulleys and portable winches used
for forestry.
It applies exclusively to winches that are used for dragging loads on horizontal and inclined ground during
logging operations, which are used for unspooling and positioning of the winch rope of another winch for
forestry or which are used to support tree felling work.
It does not apply to winches:
— that are used for hoisting or lifting operations;
— that are used in draglines;
— that are used in yarders;
— designed for traction aid purposes;
— using ropes made from natural fibres
— using operating and control voltages > 60 V;
— that are used with log splitters according to EN 609-1.
Control systems for winches with fully or partially self-evolving behaviour or logic are not covered by this
document.
The significant hazards included in this document are identified in Annex A.
This document is not applicable to winches manufactured before the date of its publication.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 730:2009, Agricultural wheeled tractors — Rear-mounted three-point linkage — Categories 1N, 1, 2N, 2,
3N, 3, 4N and 4
ISO 730:2009/Amd 1:2014, Agricultural wheeled tractors — Rear-mounted three-point linkage — Categories
1N, 1, 2N, 2, 3N, 3, 4N and 4 — Amendment 1

ISO/DIS 19472-1:2026(en)
ISO 3411:2007, Earth-moving machinery — Physical dimensions of operators and minimum operator space
envelope
ISO 3457:2003, Earth-moving machinery — Guards — Definitions and requirements
ISO 3600:2022, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Operator's manuals — Content and format
ISO 3744:2025, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering methods for an essentially free field over a reflecting plane
ISO 3767-1:2016, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Symbols for operator controls and other displays — Part 1: Common symbols
ISO 3767-1:2016/Amd 1:2020, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment — Symbols for operator controls and other displays — Part 1: Common symbols
ISO 3767-2:2016, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Symbols for operator controls and other displays — Part 2: Symbols for agricultural tractors and machinery
ISO 3767-2:2016/Amd 1:2020, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment — Symbols for operator controls and other displays — Part 2: Symbols for agricultural tractors and
machinery
ISO 4254-1:2013, Agricultural machinery — Safety — Part 1: General requirements
ISO 4254-1:2013/Amd 1:2021, Agricultural machinery — Safety — Part 1: General requirements — Amendment
ISO 4301-1:2016, Cranes — Classification — Part 1: General
ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their components
ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and equipment
ISO 5674:2024, Tractors and machinery for agriculture and forestry — Guards for power take-off (PTO) drive-
shafts — Strength and wear tests and acceptance criteria
ISO 6750-1:2019, Earth-moving machinery — Operator's manual — Part 1: Contents and format
ISO 6814:2009, Machinery for forestry — Mobile and self-propelled machinery — Terms, definitions and
classification
ISO 8084:2003, Machinery for forestry — Operator protective structures — Laboratory tests and performance
requirements
ISO 8084:2003/Amd 1:2015, Machinery for forestry — Operator protective structures — Laboratory tests and
performance requirements — Amendment 1
ISO 9244:2008, Earth-moving machinery — Machine safety labels — General principles
ISO 9244:2008/Amd 1:2016, Earth-moving machinery — Machine safety labels — General principles —
Amendment 1
ISO 10968:2020, Earth-moving machinery — Operator's controls
ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound
pressure levels at a work station and at other specified positions in an essentially free field over a reflecting
plane with negligible environmental corrections
ISO 11684:2023, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Safety labels — General principles
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO/DIS 19472-1:2026(en)
ISO 13732-1:2006, Ergonomics of the thermal environment — Methods for the assessment of human responses
to contact with surfaces — Part 1: Hot surfaces
ISO 13766-1:2018, Earth-moving and building construction machinery — Electromagnetic compatibility
(EMC) of machines with internal electrical power supply — Part 1: General EMC requirements under typical
electromagnetic environmental conditions
ISO 13849-1:2023, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards
ISO 14982:1998, Agricultural and forestry machinery — Electromagnetic compatibility — Test methods and
acceptance criteria
ISO 15817:2012, Earth-moving machinery — Safety requirements for remote operator control systems
ISO 19014-4:2020, Earth-moving machinery — Functional safety — Part 4: Design and evaluation of software
and data transmission for safety-related parts of the control system
IEC 60204-32:2023, Safety of machinery — Electrical equipment of machines — Part 32: Requirements for
hoisting machines
EN 12077-2:2024, Cranes safety — Requirements for health and safety — Part 2: Limiting and indicating devices
EN 12965:2019+A1:2025, Tractors and machinery for agriculture and forestry — Power take-off (PTO) drive
shafts and their guards — Safety
EN 13411-3:2022, Terminations for steel wire ropes — Safety — Part 3: Ferrules and ferrule securing
EN 13411-6:2004+A1:2008, Terminations for steel wire ropes — Safety — Part 6: Asymmetric wedge socket
EN 13411-7:2021, Terminations for steel wire ropes — Safety — Part 7: Symmetric wedge socket
EN 13557:2024, Cranes — Control devices and control stations
EN 17067:2018, Forestry machinery — Safety requirements on radio remote controls
EN 17822:2023, Forestry machinery — Requirements for sling gear and deflection pulleys for forestal hauling
operations
EN 60529:1991+A1:2000+A2:2013, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100:2010 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 https:// www .electropedia .org/
3.1
drum core diameter
diameter of the rope drum core in millimetres
Note 1 to entry: See Figure 2.

ISO/DIS 19472-1:2026(en)
3.2
drum rim diameter
diameter of the rope drum rim in millimetres
Note 1 to entry: See Figure 2.
3.3
drum width
distance between the rims of the rope drum, measured in millimetres
Note 1 to entry: See Figure 2.
3.4
flange depth
radial distance from the outer diameter of the rope drum rim to the surface of the rope drum core in
millimetres
Note 1 to entry: See Figure 2.
3.6
safety overhang
overhang in millimetres from the outer part of the winch rim or housing, which shall remain free after
winding the entire rope length in order to ensure that the rope remains in the drum
Note 1 to entry: Suitable measures in order to attain the safety overhang at drums are e.g. flanged pulleys, frames/
housings or rope guides.
Note 2 to entry: See Figure 3.
3.7
constant force winch
forestry winch whose maximum pulling force does not drop below the rated line pull, regardless of the
unwound rope length
3.8
rope deflection angle
angle between the actual running direction of the rope and a reference direction on the winch drum
Note 1 to entry: See Figure 1.

ISO/DIS 19472-1:2026(en)
Key
β rope deflection angle at the rope entering pulley
β – α rope deflection angle, right drum side
β + α rope deflection angle, left drum side
α angle of a reference direction on the drum e.g. the drum grooves
Figure 1 — Rope deflection angle
Note 2 to entry: In case of non-grooved drums, the rope deflection angle is the angle β.
3.9
power transmission
two or more connected moving or turning parts that transmit forces or torque
3.10
maximum speed
highest respective speed in the intended direction of movement
3.11
pulling
load movement initiated by a force transmitted from the winch via a rope to the load (trees or parts of trees,
logs etc.) which is located on the ground and does not float freely at any time or to a tree subject to a felling
operation or to a winch rope being positioned
3.12
rated line pull
force exerted by the rope for which the winch is designed according to the manufacturer’s specification
given in kN
Note 1 to entry: For calculating the rated line pull see equations (5) to (8).
3.13
overload
the operating forces which exceed those specified for the design of the winch
EXAMPLE Line pull in excess of the rated line pull.
3.14
overload protection
device which automatically prevents impermissibly high forces at the winch during operation
3.15
rope drive
system of ropes which run on rope drums and via rope pulleys as well as rope fastening parts

ISO/DIS 19472-1:2026(en)
3.16
rope end connector
device that enables connection of the rope to the load or transfer of the rope’s line pull to sling gear (3.19)
3.17
rope fastening on the rope drum
all parts by which the rope is fastened on the winch drum
3.18
operating coefficient
minimum breaking force of the rope divided by the rated line pull
3.19
sling gear
parts and devices that form the connection between an anchor point and an additional deflection pulley or
between the rope and the load
EXAMPLE Shackles, loop fastening straps, round slings or rope slings together with shackles choker chains,
choker ropes.
3.20
chocker chain
length of chain, which has a sling hook at one end and can have an insertion pin at the other end and which
serves for moving wood in hauling operations while it is held by a rope slide eyelet mounted on a hauling
rope
Note 1 to entry: To move wood, the choker chain is joined to a rope slide eyelet running on the hauling rope and tied
around the wood to be moved during hauling forming a sling.
Note 2 to entry: Choker chains have a length of approx. 2 m to 3 m
3.21
implement support winch
winch using limited line pull solely for collecting individual stems, trunks and logs from their resting
position after initial processing into the normal working range of an implement whose reach otherwise
would be insufficient (e.g. the grapple of a forestry trailer)
3.22
deflection pulley
fixed component of a winch for forestry with a rope deflection > 90°
3.23
guide roller
fixed component of a winch for forestry with a rope deflection ≤ 90°
3.24
pressure roller
fixed component of a winch for forestry used for improving the quality of spooling or increasing the pressure
on the rope during winding
3.25
hill support
movable component at the rear end of a self-propelled forestry machine (e.g. the winch shield or a separate
shield) which, when lowered to the ground, is able to hold the forestry machine positioned with the rear
end downward in the dropline of a slope at a given position without the need to apply any further brakes or
other holding devices
EXAMPLE The winch shield of a three-point hitch logging winch or a separate shield on a self-propelled forestry
machine.
ISO/DIS 19472-1:2026(en)
3.26
winch shield
enforced manly plain structure usually with an angled lower part covering a forestry winch at the operating
side and used to shield winch mechanics and the operator against flung back parts of rope and sling gear and
to anchor the winch in the ground during pulling
3.27
straight shield
movable component of a winch carrier vehicle which fulfils the function of the winch shield but is separated
from the winch system so that it can be moved independently and act as a hill support
3.28
rope entering zone
area within a 5 m horizontal radius around the point, where the rope enters the housing of the winch
covering angles of 90° symmetrical to a horizontal line angled at 90° to the winch shield and pointing into
the working direction of the winch
3.29
rope splice
connection within one rope or of two ropes or two parts of a rope which are united by interweaving the
strands so that a loop is created or that a connection between two ropes is formed which in turn are able to
support load during the intended use of such a rope or such ropes
Note 1 to entry: Rope splices can be used as rope end connectors for ropes manufactured from steel and from synthetic
fibres.
Note 2 to entry: The Flemish eye is a special form of a rope splice.
Note 3 to entry: Rope splicing can be used repair broken ropes manufactured from synthetic fibres while ropes
manufactured from steel and used for logging purposes are usually not repaired.
4 Symbols, measures and calculations
4.1 Symbols
A relevant width in mm of the guard against parts flung back;
P
A minimum distance in mm from the deflection pulley to the outer side of the guard against parts
P-Side
flung back;
B distance from the ground plane to the upper end of the guard against parts flung back;
P
Br minimum rope breaking force in kN;
min
C drum width in mm;
d rope diameter in mm;
r
d drum core diameter in mm;
dc
d drum rim diameter in mm;
dr
d relevant diameter of a pulley in mm;
rP
D flange depth in mm;
D safety distance around a tree during winch assisted felling;
2T
F line pull in kN;
ISO/DIS 19472-1:2026(en)
F measured brake holding force in kN;
B
F minimum brake holding force in kN;
Bmin
F minimum line pull during switching from hold to pull in kN;
CB
F remaining line pull after switching from pull to hold in kN;
HA
F remaining brake holding force after F has been applied in kN;
HB B
F maximum permissible line pull for the actuation of the overload protection in kN;
max
F rated line pull in kN;
rated
H housing of the drum;
i total gear reduction between the winch input shaft and the rope drum;
J height of the centre of the entrance pulley in working position;
k coverage factor of the expanded measurement uncertainty of the noise measurements
k operating coefficient of the rope;
B
l rope capacity of the drum in m;
l length of a log attached to the rope of a logging winch;
log
n speed of the drive shaft in revolutions per second (rev/s);
n speed at the drive shaft for which the winch is designed or which is allowed according to the man-
rated
ufacturer’s specification in revolutions per second (rev/s);
P guard against parts flung back;
Q drop A; drop in line pull when switching from pull to hold in %;
A
Q drop B; drop in line pull after the full application of the brake in %;
B
Q drop C; drop in line pull during engaging the clutch while switching from hold to pull in %;
C
R corner radius of a guard for forestry winches in mm;
a
S safety overhang in mm;
S part of the safety overhang on the drum in mm when the safety overhang S is formed partly by the
D
housing and partly by the drum;
T torque at the drive shaft of the winch in Nm;
U undercut width in mm;
U expanded measurement uncertainty of the noise emission measurements
exp
W height of the guard above the centre of the entrance pulley in working position;
v rope entering speed in m/s;
y coefficient as a function of the rope diameter;
α angle of a reference direction on the drum; e.g. direction of the grooves;

ISO/DIS 19472-1:2026(en)
β rope deflection angle at the rope entering pulley;
η efficiency of total gear reduction between input shaft and rope drum at the speed corresponding
to the torque used for T.
σ standard deviation of the applied basic noise emission measurement method
R0
σ uncertainty of the noise emission measurement associated with the instability of the operating and
omc
mounting conditions
σ total uncertainty of noise emission measurements
tot
For explanation of measurements see Clause 3. For measures of the drum see Figure 2:
Figure 2 — Rope drum sectional view
4.2 Safety overhang
The safety overhang S to be used in the calculations in 4.3 shall be equal to 2 times the rope diameter (S = 2 ∙
d ) unless otherwise specified in this document.
r
For winches equipped with built-in pre-tension of the rope, a driven capstan or a rope winder, a safety
overhang of 1,5 (S = 1,5 ∙ d ) is sufficient.
r
The safety overhang S may be formed by the winch housing as long as the rope is not extending over the edge
of the drum (Fig. 3a) or partially by the drum and partially by the housing (Fig. 3b). For all other winches
Figure 3c applies. The housing material for the safety overhang may be either fully (
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