SIST EN ISO 23125:2015

SLOVENSKI STANDARD
SIST EN ISO 23125:2015
01-marec-2015
1DGRPHãþD
SIST EN ISO 23125:2010
SIST EN ISO 23125:2010/A1:2012
Obdelovalni stroji - Varnost - Stružnice (ISO 23125:2015)
Machine tools - Safety - Turning machines (ISO 23125:2015)
Werkzeugmaschinen - Sicherheit - Drehmaschinen (ISO 23125:2015)
Machines-outils - Sécurité - Machines de tournage (ISO 23125:2015)
Ta slovenski standard je istoveten z: EN ISO 23125:2015
ICS:
13.110 Varnost strojev Safety of machinery
25.080.10 Stružnice Lathes
SIST EN ISO 23125:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 23125:2015

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SIST EN ISO 23125:2015

EUROPEAN STANDARD
EN ISO 23125

NORME EUROPÉENNE

EUROPÄISCHE NORM
January 2015
ICS 25.080.01 Supersedes EN ISO 23125:2010
English Version
Machine tools - Safety - Turning machines (ISO 23125:2015)
Machines-outils - Sécurité - Machines de tournage (ISO Werkzeugmaschinen - Sicherheit - Drehmaschinen (ISO
23125:2015) 23125:2015)
This European Standard was approved by CEN on 25 September 2014.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23125:2015 E
worldwide for CEN national Members.

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SIST EN ISO 23125:2015
EN ISO 23125:2015 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
2

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SIST EN ISO 23125:2015
EN ISO 23125:2015 (E)
Foreword
This document (EN ISO 23125:2015) has been prepared by Technical Committee ISO/TC 39 “Machine tools”
in collaboration with Technical Committee CEN/TC 143 “Machine tools - Safety” the secretariat of which is
held by SNV.
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 July 2015, and conflicting national standards shall be withdrawn at the
latest by July 2015.
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 23125:2010.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 23125:2015 has been approved by CEN as EN ISO 23125:2015 without any modification.
3

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SIST EN ISO 23125:2015
EN ISO 23125:2015 (E)
Annex ZA
(informative)

Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This European Standard has been prepared under a mandate given to CEN [CEN/CENELEC/ETSI] by the
European Commission [and] the European Free Trade Association to provide one means of conforming to
Essential Requirements of the New Approach Directive 98/37/EC.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
corresponding Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the products falling within the
scope of this standard.

4

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SIST EN ISO 23125:2015
INTERNATIONAL ISO
STANDARD 23125
Second edition
2015-01-15
Machine tools — Safety — Turning
machines
Machines-outils — Sécurité — Machines de tournage
Reference number
ISO 23125:2015(E)
©
ISO 2015

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 4
3.1 General terms . 4
3.2 Terms related to parts of turning machines . 5
3.3 Terms related to modes of operation — Mandatory and optional modes of
operation for turning machines . 7
3.4 Terms related to sizes and groups of turning machines defined . 8
3.5 Terms related to maximum permissible spindle speeds and axes feeds .13
4 List of significant hazards .14
4.1 General .14
4.2 Main hazard zones .14
4.3 Significant hazards and hazardous situations covered by this International Standard .15
5 Safety requirements and/or protective measures .19
5.1 General requirements .19
5.1.1 Overview .19
5.1.2 Required characteristics for guards for all machine groups .20
5.2 Specific requirements resulting from mechanical hazards identified in Clause 4 .20
5.2.1 Group 1 machines .20
5.2.2 Groups 2, 3 and 4 machines .21
5.2.3 Workpiece clamping conditions .24
5.2.4 Modes of machine operation .25
5.2.5 Optional or additional equipment for turning machines .30
5.3 Specific requirements resulting from electrical hazards .32
5.4 Specific requirements resulting from noise hazards .33
5.5 Specific requirements resulting from radiation hazards .33
5.6 Specific requirements resulting from material or substance hazards .33
5.7 Specific requirements resulting from neglect of ergonomic principles hazards .34
5.8 Specific requirements resulting from unexpected start-up, over-run or over-
speed hazards .35
5.9 Specific requirements resulting from variation in rotational speed of tool hazards .37
5.10 Specific requirements resulting from failure of the power supply hazards .38
5.11 Specific requirements resulting from failure of the control circuit hazards.38
5.12 Specific requirements resulting from errors of fitting hazards .40
5.13 Specific requirements resulting from ejected fluids or objects hazards .40
5.13.1 General requirements .40
5.13.2 Guards for large vertical Group 3 machines (NC turning machines and
turning centres) .41
5.13.3 Guards for large horizontal Group 3 machines (NC turning machines and
turning centres) .41
5.14 Specific requirements resulting from loss of stability hazards .42
5.15 Specific requirements resulting from slips, trips and fall of persons hazards .42
5.16 Verification of the safety requirements and/or protective measures .42
6 Information for use .44
6.1 Marking .45
© ISO 2015 – All rights reserved iii

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

6.2 Instruction for use .45
6.2.1 General.45
6.2.2 Tooling .47
6.2.3 Workpiece clamping .47
6.2.4 Machine functions accessible from the NC panel .48
6.2.5 Restart .48
6.2.6 Noise .48
6.2.7 Ancillary handling devices .49
6.2.8 Residual risks to be addressed by the machinery user .49
6.2.9 Installation instructions for the turning machine .50
6.2.10 Cleaning instruction for the machine.50
Annex A (normative) Impact test method for guards on turning machines .51
Annex B (informative) Test equipment for impact test and examples of materials .56
Annex C (informative) Calculation of direct impact energy .59
Annex D (informative) Example of checklist for safety functions .61
Annex E (informative) Examples of exhaust and extinguishing systems .63
Annex F (informative) Example of the determination of performance level for
interlocked guard .67
Bibliography .72
iv © ISO 2015 – All rights reserved

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SIST EN ISO 23125:2015
ISO 23125:2015(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. 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. 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 39, machine tools, Subcommittee SC 10, Safety.
This second edition cancels and replaces the first edition (ISO 23125:2010), of which it constitutes a
minor revision. It also incorporates the Amendment ISO 23125:2010/Amd1:2012.
The International Standards produced by ISO/TC 39/SC 10 in collaboration with CEN/TC 143 are
particular to machine tools and complement the relevant A and B standards on the subject of general
safety (see Introduction to ISO 12100 for a description of type-A, -B and -C standards).
This International Standard has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s).
© ISO 2015 – All rights reserved v

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

Introduction
This International Standard has been prepared to be a Harmonized Standard to provide one means of
conforming to the Essential Safety Requirements of the Machinery Directive of the European Union and
associated EFTA regulations.
This International Standard is a type-C standard as defined in ISO 12100:2010.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered
is indicated in the Scope of this International Standard. In addition, turning machines shall comply as
appropriate with ISO 12100:2010 for hazards which are not covered by this International Standard.
When provisions of this type-C standard are different from those which are stated in type-A or -B
standards, the provisions of this type-C standard take precedence over the provisions of the other
International Standards for machines that have been designed and built in accordance with the
provisions of this type-C standard.
This International Standard makes reference to the “safety categories” in EN 954-1:1996 as resistance
to faults and their subsequent behaviour in the fault condition together with the “performance level”
defined in ISO 13849-1:2006 in terms of probability of dangerous failure per hour. It is the decision of
the user of this International Standard to apply “safety categories” or “performance levels”.
The requirements of this International Standard concern designers, manufacturers, suppliers and
importers of machines described in the Scope.
This International Standard also includes a list of informative items to be provided by the manufacturer
to the user.
The requirements for a new mode of operation, Mode 3 “manual intervention machining mode” will be
discussed in the future.
vi © ISO 2015 – All rights reserved

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SIST EN ISO 23125:2015
INTERNATIONAL STANDARD ISO 23125:2015(E)
Machine tools — Safety — Turning machines
1 Scope
This International Standard specifies the requirements and/or measures to eliminate the hazards or
reduce the risks in the following groups of turning machines and turning centres, which are designed
primarily to shape metal by cutting.
— Group 1: Manually controlled turning machines without numerical control.
— Group 2: Manually controlled turning machines with limited numerically controlled capability.
— Group 3: Numerically controlled turning machines and turning centres.
— Group 4: Single- or multi-spindle automatic turning machines.
NOTE 1 For detailed information on the machine groups, see the definitions in 3.4 and mandatory and optional
modes of operation in 3.3.
NOTE 2 Requirements in this International Standard are, in general, applicable to all groups of turning
machines. If requirements are applicable to some special group(s) of turning machines only, then the special
group(s) of turning machine(s) is/are specified.
NOTE 3 Hazards arising from other metalworking processes (e.g. grinding and laser processing) are covered
by other International Standards (see Bibliography).
This International Standard covers the significant hazards listed in Clause 4 and applies to ancillary
devices (e.g. for workpieces, tools and work clamping devices, handling devices and chip handling
equipment), which are integral to the machine.
This International Standard also applies to machines which are integrated into an automatic production
line or turning cell inasmuch as the hazards and risks arising are comparable to those of machines
working separately.
This International Standard also includes a minimum list of safety-relevant information which the
manufacturer has to provide to the user. See also ISO 12100:2010, Figure 2, which illustrates the
interaction of manufacturer’s and user’s responsibility for the operational safety.
The user’s responsibility to identify specific hazards (e.g. fire and explosion) and reduce the associated
risks can be critical (e.g. whether the central extraction system is working correctly).
Where additional processes (milling, grinding, etc.) are involved, this International Standard can be
taken as a basis for safety requirements; for specific information see the Bibliography.
This International Standard applies to machines that are manufactured after the date of issue of this
International Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable to its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 230-5:2000, Test code for machine tools — Part 5: Determination of the noise emission
ISO 447:1984, Machine tools — Direction of operation of controls
ISO 702 (all parts), Machine tools — Connecting dimensions of spindle noses and work holding chucks
© ISO 2015 – All rights reserved 1

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

ISO 841:2001, Industrial automation systems and integration — Numerical control of machines —
Coordinate system and motion nomenclature
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 3746:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane
ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their
components
ISO 4414:2010, Pneumatic 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 6385:2004, Ergonomic principles in the design of work systems
ISO 8525:2008, Airborne noise emitted by machine tools — Operating conditions for metal-cutting machines
ISO 9241 (all parts), Ergonomics of human-system interaction
ISO 9355-1, Ergonomic requirements for the design of displays and control actuators — Part 1: Human
interactions with displays and control actuators
ISO 9355-2, Ergonomic requirements for the design of displays and control actuators — Part 2: Displays
ISO 9355-3, Ergonomic requirements for the design of displays and control actuators — Part 3: Control
actuators
ISO 10218-2:2011, Robots and robotic devices — Safety requirements for industrial robots — Part 2: Robot
systems and integration
ISO 11161:2007+Amd.1:2010, Safety of machinery — Integrated manufacturing systems — Basic
requirements
ISO 11202:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions applying approximate environmental
corrections
ISO 11204:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions applying accurate environmental
corrections
ISO 11228 (all parts), Ergonomics — Manual handling
ISO/TR 11688-1:1995, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849-2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13850:2006, Safety of machinery — Emergency stop — Principles for design
ISO 13851:2002, Safety of machinery — Two-hand control devices — Functional aspects and design
principles
2 © ISO 2015 – All rights reserved

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SIST EN ISO 23125:2015
ISO 23125:2015(E)

ISO 13854:1996, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
ISO 13856-2:2005, Safety of machinery — Pressure-sensitive protective devices — Part 2: General principles
for the design and testing of pressure-sensitive edges and pressure-sensitive bars
ISO 13856-3:2013, Safety of machinery — Pressure-sensitive protective devices — Part 3: General principles
for design and testing of pressure-sensitive bumpers, plates, wires and similar devices
ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper
and lower limbs
ISO 14118:2000, Safety of machinery — Prevention of unexpected start-up
ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
ISO 14120:2002, Safety of machinery — Guards — General requirements for the design and construction of
fixed and movable guards
ISO 14122-1:2001, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of
fixed means of access between two levels
ISO 14122-2:2001, Safety of machinery — Permanent means of access to machinery — Part 2: Working
platforms and walkways
ISO 14122-3:2001, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,
stepladders and guard-rails
...

SLOVENSKI STANDARD
kSIST FprEN ISO 23125:2014
01-september-2014
Obdelovalni stroji - Varnost - Stroji za struženje (ISO/FDIS 23125:2014)
Machine tools - Safety - Turning machines (ISO/FDIS 23125:2014)
Werkzeugmaschinen - Sicherheit - Drehmaschinen (ISO/FDIS 23125:2014)
Machines-outils - Sécurité - Machines de tournage (ISO/FDIS 23125:2014)
Ta slovenski standard je istoveten z: FprEN ISO 23125 rev
ICS:
13.110 Varnost strojev Safety of machinery
25.080.10 Stružnice Lathes
kSIST FprEN ISO 23125:2014 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST FprEN ISO 23125:2014

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kSIST FprEN ISO 23125:2014
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23125
ISO/TC 39/SC 10
Machine tools — Safety — Turning
Secretariat: SNV
machines
Voting begins on:
2014-05-22
Machines-outils — Sécurité — Machines de tournage
Voting terminates on:
2014-07-22
Please see the administrative notes on page iii
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 23125:2014(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 2014

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kSIST FprEN ISO 23125:2014
ISO/FDIS 23125:2014(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

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kSIST FprEN ISO 23125:2014
ISO/FDIS 23125:2014(E)

ISO/CEN PARALLEL PROCESSING
This final draft has been developed within the International Organization for Standardization (ISO), and pro­
cessed under the ISO-lead mode of collaboration as defined in the Vienna Agreement. The final draft was
established on the basis of comments received during a parallel enquiry on the draft.
This final draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
two­month approval vote in ISO and formal vote in CEN.
Positive votes shall not be accompanied by comments.
Negative votes shall be accompanied by the relevant technical reasons.
© ISO 2014 – All rights reserved iii

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kSIST FprEN ISO 23125:2014
ISO/FDIS 23125:2014(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 4
3.1 General terms . 4
3.2 Parts of turning machines . 5
3.3 Modes of operation . 7
3.4 Size and groups of turning machines defined . 7
3.5 Maximum permissible spindle speeds and axes feeds .13
4 List of significant hazards .14
4.1 Main hazard zones .14
4.2 Significant hazards and hazardous situations covered by this International Standard .15
5 Safety requirements and/or measures .19
5.1 General requirements .19
5.2 Specific requirements resulting from mechanical hazards identified in Clause 4 .20
5.3 Specific requirements resulting from electrical hazards .32
5.4 Specific requirements resulting from noise hazards .32
5.5 Specific requirements resulting from radiation hazards .33
5.6 Specific requirements resulting from material or substance hazards .33
5.7 Specific requirements resulting from neglect of ergonomic principles hazards .34
5.8 Specific requirements resulting from unexpected start-up, over-run or over-
speed hazards .35
5.9 Specific requirements resulting from variation in the rotational speed of tools hazards .37
5.10 Specific requirements resulting from failure of the power supply hazards .37
5.11 Specific requirements resulting from failure of the control circuit hazards.38
5.12 Specific requirements resulting from errors of fitting hazards .40
5.13 Specific requirements resulting from ejected fluids or objects hazards .40
5.14 Specific requirements resulting from loss of stability hazards .42
5.15 Specific requirements resulting from slips, trips and fall of persons hazards .42
5.16 Verification of the safety requirements and/or protective measures .42
6 Information for use .45
6.1 Marking .45
6.2 Instruction for use .45
Annex A (normative) Impact test method for guards on turning machines .51
Annex B (informative) Test equipment for impact test and examples of materials .56
Annex C (informative) Calculation of direct impact energy .59
Annex D (informative) Example of checklist for safety functions .61
Annex E (informative) Examples of exhaust and extinguishing systems .63
Annex F (informative) Example of the determination of performance level for interlocked guard 67
Annex ZA (informative) Relationship between this International Standard and the Essential
Requirements of EU Directive 98/37/EC .72
Bibliography .73
iv © ISO 2014 – All rights reserved

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kSIST FprEN ISO 23125:2014
ISO/FDIS 23125:2014(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. 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. 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 39, machine tools, Subcommittee SC 10, Safety.
This second edition cancels and replaces the first edition (ISO 23125:2010), of which it constitutes a
minor revision. It also incorporates the Amendment ISO 23125:2010/Amd1:2012.
The International Standards produced by ISO/TC 39/SC 10 in collaboration with CEN/TC 143 are
particular to machine tools and complement the relevant A and B standards on the subject of general
safety (see Introduction to ISO 12100 for a description of type-A, -B and -C standards).
This International Standard has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s).
© ISO 2014 – All rights reserved v

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kSIST FprEN ISO 23125:2014
ISO/FDIS 23125:2014(E)

Introduction
This International Standard has been prepared to be a Harmonized Standard to provide one means of
conforming to the Essential Safety Requirements of the Machinery Directive of the European Union and
associated EFTA regulations.
This International Standard is a type-C standard as defined in ISO 12100:2010.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered
is indicated in the Scope of this International Standard. In addition, turning machines shall comply as
appropriate with ISO 12100:2010 for hazards which are not covered by this International Standard.
When provisions of this type-C standard are different from those which are stated in type-A or -B
standards, the provisions of this type-C standard take precedence over the provisions of the other
International Standards for machines that have been designed and built in accordance with the
provisions of this type-C standard.
This International Standard makes reference to the “safety categories” in EN 954-1:1996 as resistance
to faults and their subsequent behaviour in the fault condition together with the “performance level”
defined in ISO 13849-1:2006 in terms of probability of dangerous failure per hour. It is the decision of
the user of this International Standard to apply “safety categories” or “performance levels”.
The requirements of this International Standard concern designers, manufacturers, suppliers and
importers of machines described in the Scope.
This International Standard also includes a list of informative items to be provided by the manufacturer
to the user.
The requirements for a new mode of operation, Mode 3 “manual intervention machining mode” will be
discussed in the future.
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kSIST FprEN ISO 23125:2014
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 23125:2014(E)
Machine tools — Safety — Turning machines
1 Scope
This International Standard specifies the requirements and/or measures to eliminate the hazards or
reduce the risks in the following groups of turning machines and turning centres, which are designed
primarily to shape metal by cutting.
— Group 1: Manually controlled turning machines without numerical control.
— Group 2: Manually controlled turning machines with limited numerically controlled capability.
— Group 3: Numerically controlled turning machines and turning centres.
— Group 4: Single­ or multi­spindle automatic turning machines.
NOTE 1 For detailed information on the machine groups, see the definitions in 3.4 and mandatory and optional
modes of operation in 3.5.
NOTE 2 Requirements in this International Standard are, in general, applicable to all groups of turning
machines. If requirements are applicable to some special group(s) of turning machines only, then the special
group(s) of turning machine(s) is/are specified.
NOTE 3 Hazards arising from other metalworking processes (e.g. grinding and laser processing) are covered
by other International Standards (see Bibliography).
This International Standard covers the significant hazards listed in Clause 4 and applies to ancillary
devices (e.g. for workpieces, tools and work clamping devices, handling devices and chip handling
equipment), which are integral to the machine.
This International Standard also applies to machines which are integrated into an automatic production
line or turning cell inasmuch as the hazards and risks arising are comparable to those of machines
working separately.
This International Standard also includes a minimum list of safety-relevant information which the
manufacturer has to provide to the user. See also ISO 12100:2010, Figure 2, which illustrates the
interaction of manufacturer’s and user’s responsibility for the operational safety.
The user’s responsibility to identify specific hazards (e.g. fire and explosion) and reduce the associated
risks can be critical (e.g. whether the central extraction system is working correctly).
Where additional processes (milling, grinding, etc.) are involved, this International Standard can be
taken as a basis for safety requirements; for specific information see the Bibliography.
This International Standard applies to machines that are manufactured after the date of issue of this
International Standard.
2 Normative references
TThe following documents, in whole or in part, are normatively referenced in this document and
are indispensable to its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 230­5:2000, Test code for machine tools — Part 5: Determination of the noise emission
ISO 447:1984, Machine tools — Direction of operation of controls
ISO 702 (all parts), Machine tools — Connecting dimensions of spindle noses and work holding chucks
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kSIST FprEN ISO 23125:2014
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ISO 841:2001, Industrial automation systems and integration — Numerical control of machines —
Coordinate system and motion nomenclature
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 3746:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane
ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their
components
ISO 4414:2010, Pneumatic 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 6385:2004, Ergonomic principles in the design of work systems
ISO 8525:2008, Airborne noise emitted by machine tools — Operating conditions for metal-cutting machines
ISO 9241 (all parts), Ergonomic requirements for office work with visual display terminals (VDTs)
ISO 10218­2:2011, Robots and robotic devices — Safety requirements for industrial robots — Part 2: Robot
systems and integration
ISO 11202:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions applying approximate environmental
corrections
ISO 11204:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions applying accurate environmental
corrections
ISO 11161:2007+Amd.1:2010, Safety of machinery — Integrated manufacturing systems — Basic
requirements
ISO/TR 11688­1:1995, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849­1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849­2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13850:2006, Safety of machinery — Emergency stop — Principles for design
ISO 13851:2002, Safety of machinery — Two-hand control devices — Functional aspects and design
principles
ISO 13854:1996, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
ISO 13856­2:2005, Safety of machinery — Pressure-sensitive protective devices — Part 2: General principles
for the design and testing of pressure-sensitive edges and pressure-sensitive bars
ISO 13856­3:2013, Safety of machinery — Pressure-sensitive protective devices — Part 3: General principles
for design and testing of pressure-sensitive bumpers, plates, wires and similar devices
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ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper
and lower limbs
ISO 14118:2000, Safety of machinery — Prevention of unexpected start-up
ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
ISO 14120:2002, Safety of machinery — Guards — General requirements for the design and construction of
fixed and movable guards
ISO 14122­1:2001, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of
fixed means of access between two levels
ISO 14122­2:2001, Safety of machinery — Permanent means of access to machinery — Part 2: Working
platforms and walkways
ISO 14122­3:2001, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,
stepladders and guard-rails
ISO 14122­4:2004, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders
ISO 14159:2002, Safety of machinery — Hygiene requirements for the design of machinery
ISO 16156:2004, Machine-tools safety — Safety requirements for the design and construction of work
holding chucks
IEC 60204­1:2009, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60825­1:2007, Safety of laser products — Part 1: Equipment classification and requirements
IEC 61000­6­2:2005, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments
IEC 61000­6­4:2011, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission
standard for industrial environments
IEC 61800­5­2:2007, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements —
Functional
EN 547­1:1996+A1:2008, Safety of machinery — Human body measurements — Part 1: Principles for
determining the dimensions required for openings for whole body access into machinery
EN 547­2:1996+A1:2008, Safety of machinery — Human body measurements — Part 2: Principles for
determining the dimensions required for access openings
EN 614­1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and
general principles
EN 614­2:2000+A1:2008, Safety of machinery — Ergonomic design principles — Part 2: Interactions
between the design of machinery and work tasks
EN 894­1:1997+A1:2008, Safety of machinery — Ergonomics requirements for the design of displays and
control actuators — Part 1: General principles for human interactions with displays and control actuators
EN 894­2:1997+A1:2008, Safety of machinery — Ergonomics requirements for the design of displays and
control actuators — Part 2: Displays
EN 894­3:2000+A1:2008, Safety of machinery — Ergonomics requirements for the design of displays and
control actuators — Part 3: Control actuators
EN 954­1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design
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EN 1005­1:2009, Safety of machinery — Human physical performance — Part 1: Terms and definitions
EN 1005­2:2009, Safety of machinery — Human physical performance — Part 2: Manual handling of
machinery and component parts of machinery
EN 1005­3:2009, Safety of machinery — Human physical performance — Part 3: Recommended force limits
for machinery operation
EN 1005­4:2005+A1:2008, Safety of machinery — Human physical performance — Part 4: Evaluation of
working postures and movements in relation to machinery
EN 1837:1999+A1:2009, Safety of machinery — Integral lighting of machines
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100:2010, ISO 13849-1:2006
and EN 954-1:1996 and the following apply.
3.1 General terms
3.1.1
turning machine
machine tool in which the principal movement is the rotation of the workpiece against the stationary
cutting tool(s)
3.1.2
manual control
mode of operation where each movement of the machine is individually initiated and controlled by the
operator
3.1.3
manually controlled turning machine
turning machine (3.1.1) for which process steps for the machining are controlled or started by an operator
without support by an NC-machining program
3.1.4
numerical control
NC
computerized numerical control
CNC
automatic control of a process performed by a device that makes use of numerical data introduced while
the operation is in progress
[SOURCE: ISO 2806:1994, 2.1.1]
3.1.5
numerically controlled turning machine
NC turning machine
turning machine that operates under numerical control (3.1.4) or computerized numerical control (CNC)
3.1.6
turning centre
numerically controlled turning machine (3.1.5) equipped with power-driven tools and the capability to
orientate the work holding spindle around its axis
Note 1 to entry: A turning centre can also include, but is not limited to, functions such as gauging, burnishing,
threading, boring, milling, grinding and drilling.
Note 2 to entry: If grinding processes are involved, see EN 13218 for additional safety measures.
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kSIST FprEN ISO 23125:2014
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3.1.7
work zone
space where metal cutting is to take place
3.1.8
performance level
PL
discrete level used to specify the ability of safety-related parts of control systems to perform a safety
function under foreseeable conditions
[SOURCE: ISO 13849­1:2006, 3.1.23]
3.1.9
mean time to dangerous failure
MTTF
d
expectation of the mean time to dangerous failure
[SOURCE: ISO 13849­1:2006, 3.1.25]
3.1.10
category
classification of safety-related parts of a control system in respect of its resistance to fault and its
subsequent behaviour in the fault condition, and which is achieved by the structural arrangement of the
parts and/or their reliability
[SOURCE: EN 954­1:1996, 3.2.]
3.2 Parts of turning machines
3.2.1
vision panel
window provided in a guard through which the operator can view the work zone (3.1.7) or other areas
of the machine
3.2.2
chuck
clamping device in which workpieces are clamped with the aid of either manual energy or pneumatic,
hydraulic or electric energy
Note 1 to entry: See Figure 1.
[SOURCE: ISO 16156:2004, 3.1, modified]
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kSIST FprEN ISO 23125:2014
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NOTE The chuck with 3 jaws is an example only, a chuck can have 2, 3, 4 or 6 jaws.
Figure 1 — Chuck
3.2.3
collet
device designed to hold the bar into the turning spindle, e.g. by pressure bar or draw bar
Note 1 to entry: See Figure 2.
Figure 2 — Collet
3.2.4
electronic handwheel
manually operated control device which initiates and maintains an axis movement by pulse generation
input to the numerical control (3.1.4) during its rotation
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3.3 Modes of operation
Note Table 1 gives an overview of the mandatory, optional or not allowed modes of operations for turning
machines. Table 1 is mandatory.
Table 1 — Overview of turning machine groups and modes of operation
Turning machines
Group 1 Group 2 Group 3 Group 4
Manually controlled Manually controlled Numerically con­ Single­ or multi­spin­
Mode
turning machines turning machines trolled turning dle automatic turning
of operation
without numerical with limited capa­ machines and turn­ machines
control bility of numerical ing centres
control
Mode 0
Mandatory Mandatory Optional Not allowed
manual mode
Mode 1 Mandatory
Not allowed Mandatory Mandatory
automatic mode limited Mode 1
a
Mode 2
Not allowed Optional Mandatory Mandatory
setting mode
a
Service mode Not allowed Optional Optional Optional
a
These modes are key protected and only available for well-trained and qualified staff (see 6.2.1). In order to allocate the
access, it may be necessary to provide different key switches (or other appropriate access means) for a turning machine.
For example:
   — Key 1: Access to setting mode (and automatic mode) for setting staff;
   — Key 2: Access to CNC program code and CNC-parameter modifications to adequately trained staff [see 5.8 b) 2)];
   — Key 3: Access to service mode for service staff.
NOTE  In most applications, key switch 1 (setting mode) and key switch 2 (CNC program code access) can be identical.
3.3.1
Mode 0: manual mode
operation of the machine by the operator without NC functions or non-automatic mode of the machine
axes, where the operator has control over the machining process without the use
...