Specifications for particular types of winding wires - Part 0-2: General requirements - Enamelled rectangular copper wire

IEC 60317-0-2:2020 is available as IEC 60317-0-2:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60317-0-2:2020 specifies the general requirements of enamelled rectangular copper winding wires. The range of nominal conductor dimensions is given in 4.1 and the relevant specification sheet. This fourth edition cancels and replaces the third edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - revision to Clause 2 to add new normative references for specifications for copper rods; - revision to 3.1 to add a new definition for the term “bonding layer”; - revision to 3.2.1 to the conditions specified for tests to be carried out; - revision to 4.5 to add requirements for minimal, nomimal and maximal overall dimensions with a bonding layer; - revision to Clause 5 to reference specifications for rectangular and square copper rod; - revision to Clause 6 to take into account nominal proof strength; - revision to 8.2 to the adherence test requirement; - revision to Clause 18 to make reference to the relevant specification sheet.

Technische Lieferbedingungen für bestimmte Typen von Wickeldrähten - Teil 0-2: Allgemeine Anforderungen – Flachdrähte aus Kupfer, lackisoliert

Spécifications pour types particuliers de fils de bobinage - Partie 0-2: Exigences générales - Fil de section rectangulaire en cuivre émaillé

IEC 60317-0-2:2020 est disponible sous forme de IEC 60317-0-2:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60317-0-2:2020 spécifie les exigences générales relatives aux fils de bobinage de section rectangulaire en cuivre émaillés. La gamme des dimensions nominales des conducteurs est indiquée en 4.1 et dans la feuille de spécifications correspondante. Cette quatrième édition annule et remplace la troisième édition parue en 2013. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - révision de l'Article 2 afin d'ajouter de nouvelles références normatives pour les spécifications relatives au fil machine en cuivre; - révision du 3.1 afin d'ajouter une nouvelle définition pour le terme "couche d'adhérence"; - révision du 3.2.1 afin de modifier les conditions spécifiées pour les essais à effectuer; - révision du 4.5 afin d'ajouter les exigences relatives aux dimensions extérieures minimales, nominales et maximales avec une couche d'adhérence; - révision de l'Article 5 concernant les spécifications relatives au fil machine en cuivre de sections rectangulaire et carrée; - révision de l'Article AnchorAnchor6 afin de tenir compte de la limite conventionnelle d'élasticité nominale; - révision du 8.2 concernant l'exigence de l'essai d'adhérence; - révision de l'Article 18 afin de faire référence à la feuille de spécifications correspondante.

Specifikacije za posebne vrste navijalnih žic - 0-2. del: Splošne zahteve - Emajlirana pravokotna bakrena žica (IEC 60317-0-2:2020)

General Information

Status
Published
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
31-Jul-2020
Completion Date
31-Jul-2020

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SLOVENSKI STANDARD
SIST EN IEC 60317-0-2:2020
01-oktober-2020
Nadomešča:
SIST EN 60317-0-2:2014
Specifikacije za posebne vrste navijalnih žic - 0-2. del: Splošne zahteve -
Emajlirana pravokotna bakrena žica (IEC 60317-0-2:2020)

Specifications for particular types of winding wires - Part 0-2: General requirements -

Enamelled rectangular copper wire (IEC 60317-0-2:2020)
Technische Lieferbedingungen für bestimmte Typen von Wickeldrähten - Teil 0-2:

Allgemeine Anforderungen - Lackisolierte Flachdrähte aus Kupfer (IEC 60317-0-2:2020)

Spécifications pour types particuliers de fils de bobinage - Partie 0-2: Exigences

générales - Fil de section rectangulaire en cuivre émaillé (IEC 60317-0-2:2020)
Ta slovenski standard je istoveten z: EN IEC 60317-0-2:2020
ICS:
29.060.10 Žice Wires
77.150.30 Bakreni izdelki Copper products
SIST EN IEC 60317-0-2:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60317-0-2:2020
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SIST EN IEC 60317-0-2:2020
EUROPEAN STANDARD EN IEC 60317-0-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
ICS 29.060.10 Supersedes EN 60317-0-2:2014 and all of its
amendments and corrigenda (if any)
English Version
Specifications for particular types of winding wires - Part 0-2:
General requirements - Enamelled rectangular copper wire
(IEC 60317-0-2:2020)

Spécifications pour types particuliers de fils de bobinage - Technische Lieferbedingungen für bestimmte Typen von

Partie 0-2: Exigences générales - Fil de section Wickeldrähten - Teil 0-2: Allgemeine Anforderungen -

rectangulaire en cuivre émaillé Flachdrähte aus Kupfer, lackisoliert
(IEC 60317-0-2:2020) (IEC 60317-0-2:2020)

This European Standard was approved by CENELEC on 2020-07-15. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60317-0-2:2020 E
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SIST EN IEC 60317-0-2:2020
EN IEC 60317-0-2:2020 (E)
European foreword

The text of document 55/1847/FDIS, future edition 4 of IEC 60317-0-2, prepared by IEC/TC 55

"Winding wires" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as

EN IEC 60317-0-2:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-04-15

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-07-15

document have to be withdrawn

This document supersedes EN 60317-0-2:2014 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 60317-0-2:2020 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60264 (series) NOTE Harmonized as EN 60264 (series)
IEC 60317 (series) NOTE Harmonized as EN 60317 (series)
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SIST EN IEC 60317-0-2:2020
EN IEC 60317-0-2:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60172 - Test procedure for the determination of the - -
temperature index of enamelled and tape
wrapped winding wires
IEC 60851 series Winding wires - Test methods - -
IEC 60851-3 - Winding wires - Test methods - Part 3: EN 60851-3 -
Mechanical properties
ISO 3 - Preferred numbers - Series of preferred - -
numbers
ISO 1190-1 - Copper and copper alloys; Code of - -
designation; Part 1: Designation of
materials
ISO 6892-1 2016 Metallic materials - Tensile testing - Part 1: - -
Method of test at room temperature
- - Copper and copper alloys - Copper EN 1977 -
drawing stock (wire rod)
ASTM B49 - Standard Specification for Copper Rod for - -
Electrical Purposes
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SIST EN IEC 60317-0-2:2020
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SIST EN IEC 60317-0-2:2020
IEC 60317-0-2
Edition 4.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 0-2: General requirements – Enamelled rectangular copper wire
Spécifications pour types particuliers de fils de bobinage –
Partie 0-2: Exigences générales – Fil de section rectangulaire en cuivre émaillé
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-8426-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 60317-0-2:2020
– 2 – IEC 60317-0-2:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms, definitions, general notes and appearance ........................................................... 7

3.1 Terms and definitions .............................................................................................. 7

3.2 General notes ......................................................................................................... 9

3.2.1 Methods of test ................................................................................................ 9

3.2.2 Winding wire .................................................................................................... 9

3.3 Appearance ............................................................................................................ 9

4 Dimensions...................................................................................................................... 9

4.1 Conductor dimensions ............................................................................................ 9

4.2 Tolerance on conductor dimensions ...................................................................... 10

4.3 Rounding of corners .............................................................................................. 10

4.4 Increase in dimensions due to the insulation and the bonding layer ...................... 12

4.4.1 Enamelled wires without a bonding layer ....................................................... 12

4.4.2 Enamelled wires with a bonding layer ............................................................ 12

4.5 Overall dimensions ............................................................................................... 12

4.5.1 Nominal overall dimensions ........................................................................... 12

4.5.2 Minimum overall dimensions .......................................................................... 13

4.5.3 Maximum overall dimensions ......................................................................... 13

5 Electrical resistance ...................................................................................................... 13

6 Elongation ..................................................................................................................... 13

7 Springiness (applicable to nominal proof strength ≤ 80 N·mm ) ................................... 14

8 Flexibility and adherence ............................................................................................... 14

8.1 Mandrel winding test ............................................................................................. 14

8.2 Adherence test ...................................................................................................... 14

9 Heat shock .................................................................................................................... 14

10 Cut-through ................................................................................................................... 15

11 Resistance to abrasion .................................................................................................. 15

12 Resistance to solvents ................................................................................................... 15

13 Breakdown voltage ........................................................................................................ 15

14 Continuity of insulation .................................................................................................. 15

15 Temperature index ........................................................................................................ 15

16 Resistance to refrigerants .............................................................................................. 16

17 Solderability .................................................................................................................. 16

18 Heat or solvent bonding ................................................................................................. 16

19 Dielectric dissipation factor ............................................................................................ 16

20 Resistance to transformer oil ......................................................................................... 16

21 Loss of mass ................................................................................................................. 16

23 Pin hole test .................................................................................................................. 16

30 Packaging ..................................................................................................................... 16

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Annex A (informative) Nominal cross-sectional areas for preferred and intermediate

sizes ..................................................................................................................................... 18

Bibliography .......................................................................................................................... 27

Table 1 – Conductor tolerances ............................................................................................ 10

Table 2 – Nominal cross-sectional areas of preferred sizes ................................................... 11

Table 3 – Corner radii ........................................................................................................... 12

Table 4 – Increases in dimensions ........................................................................................ 12

Table 5 – Percentage elongation after fracture ...................................................................... 13

Table 6 – Proof strength and resistivity ................................................................................. 14

Table 7 – Mandrel winding .................................................................................................... 14

Table 8 – Breakdown voltage ................................................................................................ 15

Table A.1 – Nominal cross-sectional areas ........................................................................... 18

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SIST EN IEC 60317-0-2:2020
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –
Part 0-2: General requirements – Enamelled rectangular copper wire
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60317-0-2 has been prepared by IEC technical committee 55:

Winding wires.

This fourth edition cancels and replaces the third edition published in 2013. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) revision to Clause 2 to add new normative references for specifications for copper rods;

b) revision to 3.1 to add a new definition for the term “bonding layer”;
c) revision to 3.2.1 to the conditions specified for tests to be carried out;

d) revision to 4.5 to add requirements for minimal, nomimal and maximal overall dimensions

with a bonding layer;

e) revision to Clause 5 to reference specifications for rectangular and square copper rod;

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SIST EN IEC 60317-0-2:2020
IEC 60317-0-2:2020 © IEC 2020 – 5 –
f) revision to Clause 6 to take into account nominal proof strength;
g) revision to 8.2 to the adherence test requirement;
h) revision to Clause 18 to make reference to the relevant specification sheet
The text of this International Standard is based on the following documents:
FDIS Report on voting
55/1847/FDIS 55/1865/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This International standard is to be read in conjunction with IEC 60851 (all parts). The clause

numbers used in this part of IEC 60317 are identical with the respective test numbers of

IEC 60851 (all parts).

In case of inconsistencies between IEC 60851 and this part of IEC 60317, the latter prevails.

The numbering of clauses in this standard is not continuous from Clauses 21 and 30 in order

to reserve space for possible future wire requirements prior to those for wire packaging.

A list of all parts in the IEC 60317 series, published under the general title Specifications for

particular types of winding wires, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60317-0-2:2020
– 6 – IEC 60317-0-2:2020 © IEC 2020
INTRODUCTION

This part of IEC 60317 forms an element of a series of standards which deals with insulated

wires used for windings in electrical equipment. It is composed of the following series:

1) Winding wires – Test methods (IEC 60851 series);
2) Specifications for particular types of winding wires (IEC 60317 series);
3) Packaging of winding wires (IEC 60264 series).
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SIST EN IEC 60317-0-2:2020
IEC 60317-0-2:2020 © IEC 2020 – 7 –
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –
Part 0-2: General requirements – Enamelled rectangular copper wire
1 Scope

This part of IEC 60317 specifies the general requirements of enamelled rectangular copper

winding wires.

The range of nominal conductor dimensions is given in 4.1 and the relevant specification

sheet.
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.

IEC 60172, Test procedure for the determination of the temperature index of enamelled and

tape wrapped winding wires
IEC 60851 (all parts), Winding wires – Test methods
IEC 60851-3, Winding wires – Test methods – Part 3: Mechanical properties
ISO 3, Preferred numbers – Series of preferred numbers

ISO 1190-1, Copper and copper alloys – Code of designation – Part 1: Designation of

materials

ISO 6892-1:2016, Metallic materials – Tensile testing – Part 1: Method of test at room

temperature
EN 1977, Copper and copper alloys – Copper drawing stock (wire rod)
ASTM B49, Standard Specification for Copper Rod for Electrical Purposes
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6892-1:2016 and

the following apply.

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

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
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SIST EN IEC 60317-0-2:2020
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3.1.1
class

thermal performance of a wire expressed by the temperature index and the heat shock

temperature
3.1.2
coating

material which is deposited on a conductor or wire by a suitable means and then dried and/or

cured
3.1.3
conductor
bare metal after removal of the insulation
3.1.4
crack

opening in the insulation which exposes the conductor to view at the stated magnification

3.1.5
dual coating

insulation composed of two different materials, an underlying and a superimposed coating

3.1.6
enamelled wire
wire coated with an insulation of cured resin
3.1.7
grade

range of increase in the overall diameter of the wire due

to the enamel
3.1.8
insulation

coating or covering on the conductor with the specific function of withstanding voltage

3.1.9
nominal conductor dimension
designation of the conductor size in accordance with the IEC 60317 series
3.1.10
normal vision
20/20 vision, with corrective lenses, if necessary
3.1.11
winding wire
wire used for winding a coil to provide a magnetic field
3.1.12
wire
conductor coated or covered with an insulation
3.1.13
bonding layer

material that is deposited on an enamelled wire an which has the specific function of bonding

wires together
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SIST EN IEC 60317-0-2:2020
IEC 60317-0-2:2020 © IEC 2020 – 9 –
3.2 General notes
3.2.1 Methods of test

All methods of test to be used for this document are given in IEC 60851 (all parts).

The clause numbers used in this document are identical to the corresponding test numbers in

IEC 60851 (all parts).

In case of inconsistencies between the publication on methods of test and this document,

IEC 60317-0-2 shall prevail.

Where no specific range of nominal conductor dimensions is given for a test, the test applies

to all nominal conductor dimensions covered by the specification sheet.

Unless otherwise specified, all tests shall be carried out at a temperature from 15 °C to 40 °C

and a relative humidity from 25 % to 75 %. Before measurements are made, the specimens

shall be preconditioned under these atmospheric conditions for a time sufficient to allow the

specimens to reach stability.

The wire to be tested shall be removed from the packaging in such a way that the wire will not

be subjected to tension or unnecessary bends. Before each test, sufficient wire should be

discarded to ensure that any damaged wire is not included in the test specimens.
3.2.2 Winding wire

When reference is made to a winding wire according to a standard of the IEC 60317 series

mentioned under Clause 2, the following information is given in the description:
– reference to IEC specification;
– nominal conductor dimensions in millimetres (width × thickness);
– grade;
– nominal proof strength minimum (and maximum) value.
EXAMPLE: IEC 60317-17 – 4,00 × 1,00 Grade 1 Rp = 120 N⋅mm
0.2
3.3 Appearance

The film coating shall be essentially smooth and continuous, free from streaks, blisters and

foreign material when examined with normal vision, in accordance with good commercial

practice, as wound on the original spool or reel.
4 Dimensions
4.1 Conductor dimensions

The dimensions for width and thickness of conductors of winding wires with rectangular cross-

section, recommended in this document, are taken from the R 20 series in ISO 3.

Preferred sizes are combinations of width and thickness, both in accordance with the R 20

series.

Intermediate sizes are combinations of width or thickness in accordance with the R 20 series

with the other dimension in accordance with the R 40 series.
This document covers:
– widths from 2,00 mm up to and including 31,50 mm;
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– thicknesses from 0,80 mm up to and including 10,00 mm.

The ratio width/thickness shall be within the specified limits. Combinations of R 40 and R 40

are not allowed in the case of additional sizes.

The ratio width/thickness shall be greater than or equal to 1,4:1 and shall not exceed 8:1.

The actual values of dimensions are given in Table 2.

The nominal cross-sectional areas for preferred sizes are given in Table 2, and the nominal

cross-sectional areas for intermediate sizes are given in Table A.1.
4.2 Tolerance on conductor dimensions

The conductor dimensions shall not differ from the nominal values by more than the tolerance

given in Table 1.
Table 1 – Conductor tolerances
Nominal width or thickness of the conductor Tolerance
mm ±
Over Up to and including mm
– 3,15 0,030
3,15 6,30 0,050
6,30 12,50 0,070
12,50 16,00 0,100
16,00 22,40 0,130
22,40 31,50 0,150
4.3 Rounding of corners

The arc shall merge smoothly into the flat surfaces of the conductor and the strip shall be free

from sharp, rough and projecting edges. The conductor shall have radiused corners complying

with Table 3.The specified radii shall be maintained within ±25 %.
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IEC 60317-0-2:2020 © IEC 2020 – 11 –
SIST EN IEC 60317-0-2:2020
Table 2 – Nominal cross-sectional areas of preferred sizes
Thickness

mm 0,80 0,90 1,00 1,12 1,25 1,40 1,60 1,80 2,00 2,24 2,50 2,80 3,15 3,55 4,00 4,50 5,00 5,60 6,30 7,10 8,00 9,00 10,0

Corner radius Corner radius (0,5 mm) Corner radius (0,65 mm) Corner radius (0,80 mm) Corner radius (1,0 mm) Corner radius (1,25 mm)

2,00 1,463 1,626 1,785 2,025 2,285 2,585
2,24 1,655 1,842 2,025 2,294 2,585 2,921 3,369
2,50 1,863 2,076 2,285 2,585 2,910 3,285 3,785 4,137
Not recommended
2,80 2,103 2,346 2,585 2,921 3,285 3,705 4,265 4,677 5,237
Ratio width/thickness smaller than 1,4:1
3,15 2,383 2,661 2,935 3,313 3,723 4,195 4,825 5,307 5,937 6,693
3,55 2,703 3,021 3,335 3,761 4,223 4,755 5,465 6,027 6,737 7,589 8,326
4,00 3,063 3,426 3,785 4,265 4,785 5,385 6,185 6,837 7,637 8,597 9,451 10,65

4,50 3,463 3,876 4,285 4,825 5,410 6,085 6,985 7,737 8,637 9,717 10,70 12,05 13,63

5,00 3,863 4,326 4,785 5,385 6,035 6,785 7,785 8,637 9,637 10,84 11,95 13,45 15,20 17,20

5,60 4,343 4,866 5,385 6,057 6,785 7,625 8,745 9,717 10,84 12,18 13,45 15,13 17,09 19,33 21,54

6,30 4,903 5,496 6,085 6,841 7,660 8,605 9,865 10,98 12,24 13,75 15,20 17,09 19,30 21,82 24,34 27,49

7,10 6,216 6,885 7,737 8,660 9,725 11,15 12,42 13,84 15,54 17,20 19,33 21,82 24,66 27,54 31,09 34,64

8,00 7,785 8,745 9,785 10,99 12,59 14,04 15,64 17,56 19,45 21,85 24,65 27,85 31,14 35,14 39,14 43,94

9,00 9,865 11,04 12,39 14,19 15,84 17,64 19,80 21,95 24,65 27,80 31,40 35,14 39,64 44,14 49,54 55,36

10,0 12,29 13,79 15,79 17,64 19,64 22,04 24,45 27,45 30,95 34,95 39,14 44,14 49,14 55,14 61,66 69,66

11,2 15,47 17,71 19,80 22,04 24,73 27,45 30,81 34,73 39,21 43,94 49,54 55,14 61,86 69,22 78,18 88,26

12,5 19,79 22
...

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