IEC 63182-5:2021

Magnetic powder cores - Guidelines on dimensions and the limits of surface irregularities - Part 5: Cylinder-cores

IEC 63182-5:2021 specifies the preferred range of the dimensions that are of importance for mechanical interchangeability and gives the guidelines on allowable limits of surface irregularities for cylinder-cores made of metallic magnetic powder.
This document is a specification useful in the negotiations between magnetic powder core suppliers and users about surface irregularities.

Noyaux en poudre magnétique - Lignes directrices concernant les dimensions et les limites des irrégularités de surface - Partie 5: Noyaux cylindriques

L’IEC 63182-5:2021 spécifie la plage préférentielle des dimensions qui sont importantes pour l’interchangeabilité mécanique, ainsi que les lignes directrices concernant les limites admissibles des irrégularités de surface pour les noyaux cylindriques en poudre magnétique métallique.
Le présent document est une spécification utile pour les négociations sur les irrégularités de surface entre les fournisseurs et les utilisateurs de noyaux en poudre magnétique.

General Information

• Status: Published
• Publication Date: 28-Nov-2021
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: WG 1 - TC 51/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 29-Dec-2021
• Completion Date: 29-Nov-2021

Standards Content (Sample)

IEC 63182-5 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 5: Cylinder-cores
Noyaux en poudre magnétique – Lignes directrices concernant les dimensions
et les limites des irrégularités de surface –
Partie 5: Noyaux cylindriques
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IEC 63182-5 ®
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic powder cores – Guidelines on dimensions and the limits of surface

irregularities –
Part 5: Cylinder-cores
Noyaux en poudre magnétique – Lignes directrices concernant les dimensions

et les limites des irrégularités de surface –

Partie 5: Noyaux cylindriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-1055-0

– 2 – IEC 63182-5:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Primary dimensions . 5
5 Limits of surface irregularities . 6
5.1 General . 6
5.2 Examples of surface irregularities . 6
5.3 Chips and ragged edges . 7
5.3.1 General . 7
5.3.2 Chips and ragged edges on the flat end surface . 7
5.3.3 Chips on the side surface . 7
5.4 Cracks . 8
5.5 Flash . 9
5.6 Rust . 9
5.7 Discoloration . 9
Annex A (normative) Derived standards . 10

Figure 1 – Main dimensions of cylinder-cores . 6
Figure 2 – Examples of surface irregularities . 7
Figure 3 – Locations of chips and ragged edge for cylinder-cores . 8
Figure 4 – Locations of cracks and flash for cylinder-cores . 9
Figure 5 – Rust locations for cylinder-cores . 9

Table 1 – Main dimensions of cylinder-cores . 6
Table 2 – Limits for cracks of cylinder-cores . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 5: Cylinder-cores
FOREWORD
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IEC 63182-5 has been prepared by IEC technical committee 51: Magnetic components, ferrite
and magnetic powder materials. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
51/1375/CDV 51/1392/RVC
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.

– 4 – IEC 63182-5:2021 © IEC 2021
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 63182 series published under the general title Magnetic powder
cores – Guidelines on dimensions and the limits of surface irregularities can be found on the
IEC website.
The committee has decided that the contents of this document will remain unchanged until the
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MAGNETIC POWDER CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 5: Cylinder-cores
1 Scope
This part of IEC 63182 specifies the preferred range of the dimensions that are of importance
for mechanical interchangeability and gives the guidelines on allowable limits of surface
irregularities for cylinder-cores made of metallic magnetic powder.
This document is a specification useful in the negotiations between magnetic powder core
suppliers and users about surface irregularities.
The use of "derived" standards which give more detailed specifications of component parts
while still permitting compliance with this document is discussed in Annex A.
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 63182-1, Magnetic powder cores – Guidelines on dimensions and the limits of surface
irregularities – Part 1: General specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63182-1 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
4 Primary dimensions
The main dimensions of cylinder-cores shall be those given in Table 1. The dimensions
specified in Table 1 are illustrated in Figure 1.

– 6 – IEC 63182-5:2021 © IEC 2021

Figure 1 – Main dimensions of cylinder-cores
Table 1 – Main dimensions of cylinder-cores
A B
a
mm mm
Size
Min. Max. Min. Max.
R2020 19,7 20,3 19,7 20,3
R2510 24,7 25,3 9,7 10,3
R2520 24,7 25,3 19,7 20,3
R2525 24,7 25,3 24,7 25,3
R2810 27,7 28,3 9,7 10,3
R2820 27,7 28,3 19,7 20,3
R2825 27,7 28,3 24,7 25,3
R3010 29,7 30,3 9,7 10,3
R3020 29,7 30,3 19,7 20,3
R3025 29,7 30,3 24,7 25,3
R3310 32,7 33,3 9,7 10,3
R3320 32,7 33,3 19,7 20,3
R3325 32,7 33,3 24,7 25,3
R4020 39,6 40,4 19,7 20,3
R4025 39,6 40,4 24,7 25,3
R5020 49,5 50,5 19,7 20,3
R5025 49,5 50,5 24,7 25,3
R6020 59,5 60,5 19,7 20,3
R6025 59,5 60,5 24,7 25,3
a
The core size designation contains a combination of four numbers: the first and
second are for the diameter A, the third and fourth are for the height B.

5 Limits of surface irregularities
5.1 General
Surface irregularities are defined in IEC 63182-1.
5.2 Examples of surface irregularities
Figure 2 shows different examples of surface irregularities of cylinder-cores.

Figure 2 – Examples of surface irregularities
5.3 Chips and ragged edges
5.3.1 General
The minimum area for a chip is taken as 0,5 mm , so as to be distinguishable to the naked eye.
The maximum cumulative area of chips on a surface, regardless of core size, is 50 mm . Area
and length references for visual inspection are given in IEC 63182-1.
5.3.2 Chips and ragged edges on the flat end surface
The area of the chips and the length of the ragged edges located on the flat end surface (chip
1 and ragged edge in Figure 3) shall not exceed the following limits:
– the cumulative area of the chips shall be less than 3 % of the flat end surface area, since
the flat end surface often functions as a mating surface to close a flux path with another
powder core piece;
– the total length of the ragged edges shall be less than 20 % of the perimeter of the relevant
edge.
5.3.3 Chips on the side surface
The allowable cumulative area of the chips on the side surface (chip 1’ in Figure 3) shall be
less than 6 % of the side surface area.

– 8 – IEC 63182-5:2021 © IEC 2021

Figure 3 – Locations of chips and ragged edge for cylinder-cores
5.4 Cracks
The limits for cracks at various locations shown in Figure 4 are given in Table 2.
Table 2 – Limits for cracks of cylinder-cores
Type Location Limits for single crack Limits for multiple crack
S1 Side surface < 40 % of dimension B < 80 % of dimension B
a
S1’ Side surface Not acceptable Not acceptable
S2 Flat end surface < 40 % of dimension A < 80 % of dimension A
a
S2’ Flat end surface Not acceptable Not acceptable
Flat end surface < 20 % of dimension A < 80 % of dimension A
S12
Side surface < 20 % of dimension B < 80 % of dimension B
a
Both ends of the crack contact on the line of intersection between the flat end surface and the side surface or
extend beyond the line of intersection to another surface.

Figure 4 – Locations of cracks and flash for cylinder-cores
5.5 Flash
The maximum dimension of flashes on the surface shall not exceed 0,2 mm (see Figure 4).
5.6 Rust
Figure 5 shows examples of rust at two locations for cylinder-cores. The area of rust shall not
exceed the following limits:
– the cumulative area of rust located on the same surface shall not exceed 25 % of the surface
area;
– rust should not influence the electromagnetic properties or the mechanical strength of the
core. If otherwise, it is not acceptable.

Figure 5 – Rust locations for cylinder-cores
5.7 Discoloration
Generally, n
...