This document specifies, with reference to ISO 230-1, the geometric tests on normal accuracy numerically controlled (NC) turning machines and turning centres with horizontal work spindles as defined in 3.1 and 3.2. It also specifies the applicable tolerances corresponding to the above-mentioned tests. Where applicable, this document also applies to horizontal spindle turret and single spindle automatic lathes. This document explains different concepts or configurations and common features of NC turning machines and turning centres. It also provides a terminology and designation of controlled axes. This document deals only with the verification of the accuracy of the machine. It does not apply to the operational testing of the machine (e.g. vibration, abnormal noise, stick slip motion of components) nor to machine characteristics (e.g. speeds, feeds) as such are checks generally carried out before testing the accuracy.

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ISO 23125:2014 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.
It covers the significant hazards 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. ISO 23125:2014 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.

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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.

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Specifies both geometrical and practical tests on these parallel lathes, and gives the corresponding permissible dviations which apply. It deals only with verification of the accuracy of the machine. It does not apply tothe testing of the running of the machine (vibrations, abnormal noises, stick-slip motion of components, etc.), or to characteristics (speeds, feeds, etc.), which shall generally be checked before the accuracy is tested. This fourth edition cancels and replaces the third edition (ISO 1708: 1983).

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Describes both special tests and practical tests for hydraulic and electric servo-controlled copying attachments (not for mechanically controlled ones) of general-purpose normal precision (centre lathes, vertical boring machines, capstan lathes or others) and copying lathes. The tests are intended to supplement the tests for the various types of lathes. It also applies to lathes with single-axis copying systems and to lathes where two axes are used in conjunction to produce a profile of up to 180° included angle.

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Defines the machining processes that can be carried out on these turning and boring lathes. Describes the different types of machines. Gives the nomenclature for these machines in English, French and Russian as well as in German, Italian and Swedish. ISO 3655 specifies both geometrical and practical tests on these general purpose and normal accuracy machines, and gives the corresponding permissible deviations which apply. It deals only with the verification of the accuracy of the machine. Does not apply to the testing of the running of the machine, or to characteristics.

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The scope should not be regarded as restricted to lathes only, but may be extended to all the other machine tools with centres of the same type. Specifies designation and sizes in millimetres and in inches.

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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. 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 12100-1:2003, Figure 1, 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 (e.g. 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.

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ISO 23125:2010 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.

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose horizontal multi-spindle and vertical multi-spindle automatic turning machines which are designed primarily to work cold metal as defined in 3.1 and hereafter referred to as "machines".
NOTE   Hazards arising from other metal processes (e.g. grinding, laser processing) are covered by other standards (see Bibliography).
Horizontal single spindle and vertical single spindle automatic turning machines are covered by EN 12415:2000.
This standard covers the significant hazards, listed in clause 4.
3 This standard applies to numerically and/or mechanically controlled multi-spindle automatic turning machines;
The standard also applies to ancillary devices, e.g. collets, power operated chucks, bar/workpiece handling devices and swarf handling equipment which are integral to the machine.
This standard also applies to machines which are integrated into an automatic production line or turning cell in as much as the hazards and risks arising are comparable to those of machines working separately.
This European Standard is not applicable to NC turning machines with machining facilities under manual control which are dealt with in EN 12840:2001.
This standard applies to machines which are manufactured after the date of issue of this standard.

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TC - Addition of a Note in 5.2.1.2.3
CMC - Normative references to be updated

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose numerically controlled large turning machines and turning centres which are designed primarily to work cold metal as defined in 3.1 and 3.2 and herein after referred to as "machines". This Standard covers all significant relevant hazards which are listed in clause 4.

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This European Standard specifies the requirements and/or measures to remove the hazards and the risks on general purpose manually controlled horizontal or vertical spindle turning machines which may have limited or unlimited automatic control which are intended to work cold metal and herein after referred to as "machines". This Standard covers all significant hazards, which are listed in clause 4.

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose numerically controlled turning machines and turning centres which are designed primarily to work cold metal with no access to the work-zone during machining as defined in 3.1 and 3.2 and hereafter referred to as "machines". This Standard covers the significant hazards, listed in clause 4.

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose horizontal multi-spindle and vertical multi-spindle automatic turning machines which are designed primarily to work cold metal as defined in 3.1 and hereafter referred to as "machines".
NOTE   Hazards arising from other metal processes (e.g. grinding, laser processing) are covered by other standards (see Bibliography).
Horizontal single spindle and vertical single spindle automatic turning machines are covered by EN 12415:2000.
This standard covers the significant hazards, listed in clause 4.
¾ This standard applies to numerically and/or mechanically controlled multi-spindle automatic turning machines;
The standard also applies to ancillary devices, e.g. collets, power operated chucks, bar/workpiece handling devices and swarf handling equipment which are integral to the machine.
This standard also applies to machines which are integrated into an automatic production line or turning cell in as much as the hazards and risks arising are comparable to those of machines working separately.
This European Standard is not applicable to NC turning machines with machining facilities under manual control which are dealt with in EN 12840:2001.
This standard applies to machines which are manufactured after the date of issue of this standard.

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TC - Addition of a Note in 5.2.1.2.3
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This European Standard specifies the requirements and/or measures to remove the hazards and the risks on general purpose manually controlled horizontal or vertical spindle turning machines which may have limited or unlimited automatic control which are intended to work cold metal and herein after referred to as "machines". This Standard covers all significant hazards, which are listed in clause 4.

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose numerically controlled large turning machines and turning centres which are designed primarily to work cold metal as defined in 3.1 and 3.2 and herein after referred to as "machines". This Standard covers all significant relevant hazards which are listed in clause 4.

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This European Standard specifies the requirements and/or measures to remove the hazards and limit the risks on general purpose numerically controlled turning machines and turning centres which are designed primarily to work cold metal with no access to the work-zone during machining as defined in 3.1 and 3.2 and hereafter referred to as "machines". This Standard covers the significant hazards, listed in clause 4.

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