Hollow metallic waveguides - Part 4: Relevant specifications for circular waveguides

IEC 60153-4:2022 specifies straight hollow metallic tubing of circular cross section for use as waveguides in electronic equipment. The aim of this document is to specify the hollow metallic waveguides:
a) the details necessary to ensure compatibility and, as far as essential, interchangeability;
b) test methods;
c) uniform requirements for the electrical and mechanical properties
This document is intended to be read in conjunction with IEC 60153-1, which gives general requirements and test methods. This fourth edition cancels and replaces the third edition published in 2017. edition:
a. change of the designation scheme for small circular waveguides (e.g. C 25.5k instead of C 25500);
b. revision of Table 1:
- correction of two waveguide designations (now C 1.2k, C 12k);
- correction of three waveguide diameters (C 140, C 1.4k, C 14k);
- tightening of inner diameter tolerances for waveguides smaller than C 890;
- deletion of waveguide attenuation values for aluminium, gold, and brass;
c. deletion of Table 2 (duplication) and replacement with the table of intermediate waveguide sizes originally envisaged here;
d. addition of an equation for calculating the attenuation of waveguides made of any material.

Guides d'ondes métalliques creux - Partie 4: Spécifications applicables aux guides d’ondes circulaires

lEC 60153-4:2022 spécifie des tubes métalliques creux rectilignes de section circulaire destinés à être utilisés comme guides d’ondes dans les matériels électroniques.
Le présent document a pour but de spécifier les guides d’ondes métalliques creux en donnant:
a) les détails nécessaires pour assurer la compatibilité et, dès lors que c’est essentiel, l’interchangeabilité;
b) les méthodes d’essai;
c) des exigences uniformes pour les propriétés électriques et mécaniques.
Le présent document est destiné à être lu conjointement avec l’IEC 60153-1, qui fournit les exigences générales et les méthodes d’essai. Cette quatrième édition annule et remplace la troisième édition parue en 2017. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a. modification du système de désignation des petits guides d’ondes circulaires (par exemple C 25.5k au lieu de C 25500);
b. révision du Tableau 1:
- correction de la désignation de deux guides d’ondes (désormais C 1.2k et C 12k);
- correction du diamètre de trois guides d’ondes (C 140, C 1.4k et C 14k);
- resserrement des tolérances sur les diamètres intérieurs des guides d’ondes de dimensions inférieures à celles du type C 890;
- suppression des valeurs d’affaiblissement des guides d’ondes pour l’aluminium, l’or et le laiton;
c. suppression du Tableau 2 (duplication) et remplacement par le tableau des guides d’ondes de tailles intermédiaires initialement prévu à cet emplacement;
d. ajout d’une équation pour le calcul de l’affaiblissement des guides d’ondes quel que soit le matériau dont ils sont constitués.

General Information

Status
Published
Publication Date
08-Jun-2022
Current Stage
PPUB - Publication issued
Completion Date
09-Jun-2022
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IEC 60153-4
Edition 4.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Hollow metallic waveguides –
Part 4: Relevant specifications for circular waveguides
Guides d’ondes métalliques creux –
Partie 4: Spécifications applicables aux guides d’ondes circulaires
IEC 60153-4:2022-06(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60153-4
Edition 4.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Hollow metallic waveguides –
Part 4: Relevant specifications for circular waveguides
Guides d’ondes métalliques creux –
Partie 4: Spécifications applicables aux guides d’ondes circulaires
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.10 ISBN 978-2-8322-0832-8

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
---------------------- Page: 3 ----------------------
– 2 – IEC 60153-4:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General ........................................................................................................................... 6

4.1 Standardized types ................................................................................................. 6

4.2 Type designation .................................................................................................... 6

4.3 Frequency range ..................................................................................................... 6

5 Mechanical requirements ................................................................................................. 7

5.1 General ................................................................................................................... 7

5.2 Dimensions ........................................................................................................... 10

5.2.1 Inner dimensions ........................................................................................... 10

5.2.2 Wall thickness ............................................................................................... 10

5.2.3 Eccentricity .................................................................................................... 11

5.2.4 Outer dimensions .......................................................................................... 11

5.3 Other mechanical requirements ............................................................................ 11

5.3.1 Bow ............................................................................................................... 11

5.3.2 Surface roughness ......................................................................................... 11

5.3.3 Internal stresses ............................................................................................ 11

6 Electrical tests – Attenuation coefficient ........................................................................ 12

7 Additional tests – Pressure sealing ................................................................................ 13

Bibliography .......................................................................................................................... 14

Table 1 – Circular waveguides (preferred sizes) ..................................................................... 8

Table 2 – Circular waveguides (intermediate and preferred sizes)........................................... 9

Table 3 – Inner diameter tolerances ...................................................................................... 10

Table 4 – Outer diameter tolerances ..................................................................................... 11

---------------------- Page: 4 ----------------------
IEC 60153-4:2022 © IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOLLOW METALLIC WAVEGUIDES –
Part 4: Relevant specifications for circular waveguides
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,

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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

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

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

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

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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.

IEC 60153-4 has been prepared by subcommittee 46F: RF and microwave passive components,

of IEC technical committee 46: Cables, wires, waveguides, RF connectors, RF and microwave

passive components and accessories. It is an International Standard.

This fourth edition cancels and replaces the third edition published in 2017. This edition

constitutes a technical revision.

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

edition:

a) change of the designation scheme for small circular waveguides (e.g. C 25.5k instead of

C 25500);
b) revision of Table 1:
• correction of two waveguide designations (now C 1.2k, C 12k);
• correction of three waveguide diameters (C 140, C 1.4k, C 14k);
• tightening of inner diameter tolerances for waveguides smaller than C 890;
• deletion of waveguide attenuation values for aluminium, gold, and brass;
---------------------- Page: 5 ----------------------
– 4 – IEC 60153-4:2022 © IEC 2022

c) deletion of Table 2 (duplication) and replacement with the table of intermediate waveguide

sizes originally envisaged here;

d) addition of an equation for calculating the attenuation of waveguides made of any material.

The text of this International Standard is based on the following documents:
Draft Report on voting
46F/616/FDIS 46F/621/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 60153 series, published under the general title Hollow metallic

waveguides, can be found on the IEC website.
This International Standard is to be read in conjunction with IEC 60153-1.

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

stability date indicated on the IEC website under 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.
---------------------- Page: 6 ----------------------
IEC 60153-4:2022 © IEC 2022 – 5 –
HOLLOW METALLIC WAVEGUIDES –
Part 4: Relevant specifications for circular waveguides
1 Scope

This part of IEC 60153 specifies straight hollow metallic tubing of circular cross section for use

as waveguides in electronic equipment.
The aim of this document is to specify the hollow metallic waveguides:

a) the details necessary to ensure compatibility and, as far as essential, interchangeability;

b) test methods;
c) uniform requirements for the electrical and mechanical properties.

No recommendations are made for the materials to be used for waveguides. The choice of

materials is to be agreed on between the customer and the manufacturer.

This document is intended to be read in conjunction with IEC 60153-1, which gives general

requirements and test methods.
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 60028:1925, International standard of resistance for copper
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at
http://www.electropedia.org/)

IEC 60153-1, Hollow metallic waveguides – Part 1: General requirements and measuring

methods
IEC 60261, Sealing test for pressurized waveguide tubing and assemblies
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050 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
---------------------- Page: 7 ----------------------
– 6 – IEC 60153-4:2022 © IEC 2022
4 General
4.1 Standardized types

The series of circular waveguides covered in this document are shown in Table 1 and Table 2.

Table 1 lists the waveguides with preferred sizes. Since the operating frequency ranges of

circular waveguides are very small, it is desirable to have densely spaced waveguide sizes

available. For this reason, intermediate sizes have been defined . In Table 2, these are

compiled together with the preferred sizes.
4.2 Type designation
For circular waveguides the type designation comprises the code
60153˽IEC–C˽size
where
˽ is the space character, and

size is a number characterizing a particular size of waveguide. This number expresses

approximately in multiples of hundred megahertz (100 MHz) the centre frequency of the

recommended operating frequency range. Numbers of one thousand and above are – to

keep the designation short – divided by one thousand and followed by a lower-case "k"

for kilo (e.g. 25.5k for 25 500 and 29k for 29 000) . A possibly necessary decimal sign

is written as a dot.
4.3 Frequency range

Depending on the application of the circular waveguide, a suitable electromagnetic waveguide

mode shall be selected. The propagation of this mode is only possible at frequencies above a

certain cut-off frequency. Table 1 shows the cut-off frequencies for the technically most

important modes : TE (1st and dominant mode), TM (2nd mode), TE (3rd mode), TE
11 01 21 01
(4th mode) and TE (14th mode).

The recommended operating frequency range on which this document is based is defined as a

pure dominant mode range between 1,15 times the TE cut-off frequency and 0,96 times the

TM cut-off frequency . The centre frequency f of the recommended operating frequency

01 centre

range – from which the waveguide type designation is derived – is then calculated as the

geometric mean of this range .
___________

The designations and inner diameters for the intermediate waveguides from C 3.3 to C 890 have been taken

directly from IEC 60153-4:1973. The designations and inner diameters of the smaller intermediate waveguides

have been newly derived from the larger intermediate waveguides by scaling.

This designation scheme is analogous to that specified in IEC 60153-2:2016 for the ordinary rectangular

waveguides.

The cut-off frequency f for a particular mode of a circular waveguide is calculated by f = x · c / (π · D), where

c c 0

x can be approximated by 1,8412; 2,4048; 3,0542; 3,8317; 7,0156 for the mode TE ; TM ; TE ; TE ; TE

11 01 21 01 02,

respectively. Furthermore, c is the velocity of light in free-space (≈ 2,997 925·10 m/s), π is Archimedes' constant

(≈ 3,14159) and D is the inner waveguide diameter expressed in metres (m).

There are other common recommendations for the operating frequency range of a circular waveguide. For

example, the TIA/EIA-200-A standard recommends the range between 1,15 times the TE cut-off frequency and

0,95 times the TE cut-off frequency, which is not a pure dominant mode range.
5 0,5

Due to (1,15 · 0,96 · 2,4048 / 1,8412) ≈ 1,2, the centre frequency f corresponds to 1,2 times the TE

centre 11
cut-off frequency.
---------------------- Page: 8 ----------------------
IEC 60153-4:2022 © IEC 2022 – 7 –
5 Mechanical requirements
5.1 General

It should be noted that no recommendations are made for the materials to be used for

waveguides. The choice of materials is to be agreed on between the customer and the

manufacturer.
---------------------- Page: 9 ----------------------
– 8 – IEC 60153-4:2022 © IEC 2022
Table 1 – Circular waveguides (preferred sizes)
D D

Type Cut-off frequency in GHz Inner diameter D Wall thickn. t Outer diameter D attenuation coefficient in dB/m

designation for the mode in mm in mm for TE in an ideal copper waveguide
in mm 11
Nominal Tolerance Nominal Nominal Tolerance Theoretical Maximum
centre
60153 IEC– TE TM TE TE TE
11 01 21 01 02
value ± value value ± value value
in GHz
C 3.3 0,271 0,354 0,450 0,564 1,03 647,90 0,65 0,325 0,00067 0,00088
C 4 0,317 0,415 0,527 0,661 1,21 553,49 0,55 0,381 0,00085 0,0011
C 4.5 0,372 0,485 0,616 0,773 1,42 472,85 0,47 0,446 0,0011 0,0014
C 5.3 0,435 0,568 0,722 0,905 1,66 403,94 0,40 0,522 0,0014 0,0018
C 6.2 0,509 0,665 0,845 1,06 1,94 345,06 0,35 0,611 0,0017 0,0023
C 7 0,596 0,778 0,989 1,24 2,27 294,79 0,29 not specified 0,715 0,0022 0,0029
C 8 0,698 0,911 1,16 1,45 2,66 251,84 0,25 0,837 0,0028 0,0036
C 10 0,817 1,07 1,35 1,70 3,11 215,14 0,22 0,980 0,0035 0,0046
C 12 0,956 1,25 1,59 1,99 3,64 183,77 0,18 1,147 0,0045 0,0058
C 14 1,12 1,46 1,86 2,33 4,26 157,00 0,16 1,343 0,0057 0,0073
C 16 1,31 1,71 2,17 2,73 4,99 134,11 0,13 1,572 0,0072 0,0093

C 18 1,53 2,00 2,54 3,19 5,84 114,58 0,11 3,300 121,180 0,130 1,840 0,0091 0,0118

C 22 1,80 2,34 2,98 3,74 6,84 97,866 0,098 3,300 104,466 0,110 2,154 0,0115 0,0149

C 25 2,10 2,74 3,49 4,37 8,01 83,617 0,084 3,300 90,217 0,110 2,521 0,0145 0,0189

C 30 2,46 3,21 4,08 5,12 9,37 71,425 0,071 3,300 78,025 0,095 2,952 0,0184 0,0239

C 35 2,88 3,76 4,78 5,99 11,0 61,036 0,061 3,300 67,636 0,095 3,454 0,0233 0,0303

C 40 3,38 4,41 5,61 7,03 12,9 51,994 0,052 2,540 57,074 0,095 4,055 0,0296 0,0385

C 48 3,95 5,16 6,56 8,23 15,1 44,450 0,044 2,540 49,530 0,080 4,743 0,0375 0,0488

C 56 4,61 6,02 7,65 9,60 17,6 38,100 0,038 2,030 42,160 0,080 5,534 0,0473 0,0614

C 65 5,40 7,05 8,96 11,2 20,6 32,537 0,033 2,030 36,597 0,080 6,480 0,0599 0,0779

C 76 6,32 8,26 10,5 13,2 24,1 27,788 0,028 1,650 31,088 0,080 7,587 0,0759 0,0987

C 89 7,37 9,63 12,2 15,3 28,1 23,825 0,024 1,650 27,125 0,065 8,850 0,0956 0,124
C 104 8,68 11,3 14,4 18,1 33,1 20,244 0,020 1,270 22,784 0,065 10,41 0,122 0,159
C 120 10,1 13,1 16,7 20,9 38,3 17,475 0,017 1,270 20,015 0,065 12,07 0,152
C 140 11,6 15,2 19,3 24,2 44,4 15,088 0,015 1,015 17,118 0,055 13,97 0,190
C 165 13,8 18,1 22,9 28,8 52,7 12,700 0,013 1,015 14,730 0,055 16,60 0,246
C 190 15,8 20,6 26,2 32,9 60,2 11,125 0,010 1,015 13,155 0,050 18,95 0,300
C 220 18,4 24,1 30,6 38,4 70,3 9,5250 0,010 0,760 11,045 0,050 22,14 0,378
C 255 21,1 27,5 35,0 43,9 80,4 8,3312 0,0076 0,760 9,851 0,050 25,31 0,462
C 290 24,6 32,2 40,8 51,2 93,8 7,1374 0,0076 0,760 8,657 0,050 29,54 0,583
C 330 27,7 36,1 45,9 57,6 105 6,3500 0,0076 0,510 7,370 0,050 33,20 0,695
C 380 31,6 41,3 52,4 65,7 120 5,5626 0,0076 0,510 6,583 0,050 37,90 0,847
C 430 36,8 48,1 61,0 76,6 140 4,7752 0,0076 0,510 5,795 0,050 44,15 1,07
C 495 40,2 52,5 66,7 83,7 153 4,3688 0,0076 0,510 5,389 0,050 48,26 1,22
C 580 49,1 64,1 81,4 102 187 3,5814 0,0076 0,510 4,601 0,050 58,87 1,64
C 660 55,3 72,3 91,8 115 211 3,1750 0,0076 0,380 3,935 0,050 66,41 1,96
C 765 63,5 82,9 105 132 242 2,7686 0,0076 0,380 3,529 0,050 76,15 2,41
C 890 73,6 96,1 122 153 280 2,3876 0,0076 0,380 3,148 0,050 88,31 3,01
C 1.04k 86,8 113 144 181 331 2,0244 0,0050 104,1 3,86
C 1.2k 101 131 167 209 383 1,7475 0,0050 120,7 4,81
C 1.4k 116 152 193 242 444 1,5088 0,0050 139,7 6,00
C 1.65k 138 181 229 288 527 1,2700 0,0050 166,0 7,77
C 1.9k 158 206 262 329 602 1,1125 0,0050 189,5 9,47
C 2.2k 184 241 306 384 703 0,9525 0,0050 221,4 12,0
C 2.55k 211 275 350 439 804 0,8331 0,0035 253,1 14,6
C 2.9k 246 322 408 512 938 0,7137 0,0035 295,4 18,4
C 3.3k 277 361 459 576 1050 0,6350 0,0035 332,0 22,0
C 3.8k 316 413 524 657 1200 0,5563 0,0035 379,0 26,8
C 4.3k 368 481 610 766 1400 0,4775 0,0035 441,5 33,7
C 4.95k 402 525 667 837 1530 0,4369 0,0035 482,6 38,5
not specified
C 5.8k 491 641 814 1020 1870 0,3581 0,0025 588,8 51,9
C 6.6k 553 723 918 1150 2110 0,3175 0,0025 664,1 62,1
C 7.65k 635 829 1050 1320 2420 0,2769 0,0025 761,4 76,3
C 8.9k 736 961 1220 1530 2800 0,2388 0,0025 882,9 95,3
C 10.4k 868 1130 1440 1810 3310 0,2024 0,0025 1042 122
C 12k 1010 1310 1670 2090 3830 0,1748 0,0025 1206 152
C 14k 1160 1520 1930 2420 4440 0,1509 0,0015 1397 190
C 16.5k 1380 1810 2290 2880 5270 0,1270 0,0015 1660 246
C 19k 1580 2060 2620 3290 6020 0,1113 0,0015 1894 299
C 22k 1840 2410 3060 3840 7020 0,0953 0,0015 2212 378
C 25.5k 2110 2750 3500 4390 8040 0,0833 0,0015 2531 462
C 29k 2460 3210 4080 5120 9380 0,0714 0,0015 2953 583
for subsequent study
---------------------- Page: 10 ----------------------
IEC 60153-4:2022 © IEC 2022 – 9 –
Table 2 – Circular waveguides (intermediate and preferred sizes)

Type Inner diameter D Type Inner diameter D Type Inner diameter D Type Inner diameter D

designation in mm designation in mm designation in mm designation in mm

60153 IEC– Nominal value 60153 IEC– Nominal value 60153 IEC– Nominal value 60153 IEC– Nominal value

C 3.3 647,90 C 40 51,994 C 430 4,7752 C 4.3k 0,4775
C 3.43 623,00 C 42.7 50,000 C 457 4,6700 C 4.57k 0,4670
C 3.56 599,00 C 44.4 48,100 C 467 4,5700 C 4.67k 0,4570
C 3.71 576,00 C 46.2 46,200 C 478 4,4700 C 4.78k 0,4470
C 4 553,49 C 48 44,450 C 495 4,3688 C 4.95k 0,4369
C 4.01 532,00 C 49.9 42,800 C 512 4,1700 C 5.12k 0,4170
C 4.17 512,00 C 51.8 41,200 C 539 3,9600 C 5.39k 0,3960
C 4.34 492,00 C 53.9 39,600 C 568 3,7600 C 5.68k 0,3760
C 4.5 472,85 C 56 38,100 C 580 3,5814 C 5.8k 0,3581
C 4.69 455,00 C 58.3 36,600 C 613 3,4800 C 6.13k 0,3480
C 4.88 437,00 C 60.6 35,200 C 632 3,3800 C 6.32k 0,3380
C 5.08 420,00 C 63.2 33,800 C 651 3,2800 C 6.51k 0,3280
C 5.3 403,94 C 65 32,537 C 660 3,1750 C 6.6k 0,3175
C 5.50 388,00 C 68.2 31,300 C 696 3,0700 C 6.96k 0,3070
C 5.72 373,00 C 70.9 30,100 C 721 2,9600 C 7.21k 0,2960
C 5.95 359,00 C 73.9 28,900 C 746 2,8600 C 7.46k 0,2860
C 6.2 345,06 C 76 27,788 C 765 2,7686 C 7.65k 0,2769
C 6.43 332,00 C 80.0 26,700 C 799 2,6700 C 7.99k 0,2670
C 6.69 319,00 C 83.1 25,700 C 831 2,5700 C 8.31k 0,2570
C 6.95 307,00 C 86.1 24,800 C 876 2,4400 C 8.76k 0,2440
C 7 294,79 C 89 23,825 C 890 2,3876 C 8.9k 0,2388
C 7.54 283,00 C 93.2 22,900 C 932 2,2900 C 9.32k 0,2290
C 7.85 272,00 C 97.0 22,000 C 970 2,2000 C 9.7k 0,2200
C 7.99 262,00 C 101 21,100 C 1.01k 2,1100 C 10.1k 0,2110
C 8 251,84 C 104 20,244 C 1.04k 2,0244 C 10.4k 0,2024
C 8.82 242,00 C 109 19,500 C 1.09k 1,9500 C 10.9k 0,1950
C 9.16 233,00 C 114 18,800 C 1.14k 1,8800 C 11.4k 0,1880
C 9.53 224,00 C 118 18,150 C 1.18k 1,8150 C 11.8k 0,1815
C 10 215,14 C 120 17,475 C 1.2k 1,7475 C 12k 0,1748
C 10.3 207,00 C 127 16,850 C 1.27k 1,6850 C 12.7k 0,1685
C 10.7 199,00 C 129 16,250 C 1.29k 1,6250 C 12.9k 0,1625
C 11.2 191,00 C 136 15,650 C 1.36k 1,5650 C 13.6k 0,1565
C 12 183,77 C 140 15,088 C 1.4k 1,5088 C 14k 0,1509
C 12.1 176,50 C 148 14,450 C 1.48k 1,4450 C 14.8k 0,1445
C 12.6 170,00 C 154 13,850 C 1.54k 1,3850 C 15.4k 0,1385
C 13.1 163,50 C 161 13,250 C 1.61k 1,3250 C 16.1k 0,1325
C 14 157,00 C 165 12,700 C 1.65k 1,2700 C 16.5k 0,1270
C 14.1 151,00 C 174 12,300 C 1.74k 1,2300 C 17.4k 0,1230
C 14.7 145,00 C 179 11,900 C 1.79k 1,1900 C 17.9k 0,1190
C 15.3 139,50 C 186 11,500 C 1.86k 1,1500 C 18.6k 0,1150
C 16 134,11 C 190 11,125 C 1.9k 1,1125 C 19k 0,1113
C 16.5 129,00 C 198 10,760 C 1.98k 1,0760 C 19.8k 0,1076
C 17.2 124,00 C 207 10,300 C 2.07k 1,0300 C 20.7k 0,1030
C 17.9 119,00 C 219 9,7000 C 2.19k 0,9700 C 21.9k 0,0970
C 18 114,58 C 220 9,5250 C 2.2k 0,9525 C 22k 0,0953
C 19.4 110,00 C 232 9,2200 C 2.32k 0,9220 C 23.2k 0,0092
C 20.1 106,00 C 239 8,9200 C 2.39k 0,8920 C 23.9k 0,0892
C 20.9 102,00 C 248 8,6200 C 2.48k 0,8620 C 24.8k 0,0862
C 22 97,866 C 255 8,3312 C 2.55k 0,8331 C 25.5k 0,0833
C 22.7 94,000 C 266 8,0200 C 2.66k 0,8020 C 26.6k 0,0802
C 23.6 90,400 C 277 7,7200 C 2.77k 0,7720 C 27.7k 0,0772
C 24.5 87,000 C 288 7,4200 C 2.88k 0,7420 C 28.8k 0,0742
C 25 83,617 C 290 7,1374 C 2.9k 0,7137 C 29k 0,0714
C 26.6 80,400 C 308 6,9400 C 3.08k 0,6940
C 27.7 77,200 C 317 6,7400 C 3.17k 0,6740
C 28.7 74,400 C 327 6,5200 C 3.27k 0,6520
C 30 71,425 C 330 6,3500 C 3.3k 0,6350
C 31.1 68,600 C 348 6,1400 C 3.48k 0,6140
C 32.3 66,000 C 359 5,9400 C 3.59k 0,5940
C 33.7 63,400 C 372 5,7400 C 3.72k 0,5740
C 35 61,036 C 380 5,5626 C 3.8k 0,5563
C 36.4 58,600 C 398 5,3600 C 3.98k 0,5360
C 37.8 56,400 C 414 5,1600 C 4.14k 0,5160
C 39.4 54,200 C 429 4,9500 C 4.29k 0,4950
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– 10 – IEC 60153-4:2022 © IEC 2022
5.2 Dimensions
5.2.1 Inner dimensions
5.2.1.1 Inner diameters and their tolerances

Table 1 specifies the nominal values and the tolerances of the inner diameters for the preferred

sizes of circular waveguides. Table 2 specifies the nominal inner diameters for circular

waveguides of intermediate and preferred sizes.

The inner diameter tolerances specified in Table 1 are based on the general principle given in

Table 3.
Table 3 – Inner diameter tolerances
Range of sizes Tolerance ±
C 3.3 to C 165 0,1 % of the nominal inner diameter
C 190 to C 220 0,010 mm
C 255 to C 890 0,007 6 mm
C 1.04k to C 2.2k 0,005 0 mm
C 2.55k to C 4.95k 0,003 5 mm
C 5.8k to C 12k 0,002 5 mm
C 14k t
...

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