SIST EN ISO 22705-3:2025

SLOVENSKI STANDARD
01-december-2025
Vzmeti - Merilni in preskusni parametri - 3. del: Hladno oblikovane cilindrične,
vijačne, torzijske tlačne vzmeti (ISO 22705-3:2024)
Springs - Measurement and test parameters - Part 3: Cold formed cylindrical helical
torsion springs (ISO 22705-3:2024)
Federn - Mess- und Prüfgrößen - Teil 3: Kaltgeformte zylindrische Schraubenfedern (ISO
22705-3:2024)
Ressort - Mesures et paramètres d'essai - Partie 3: Ressorts à torsion cylindrique,
enroulés à froid (ISO 22705-3:2024)
Ta slovenski standard je istoveten z: EN ISO 22705-3:2025
ICS:
21.160 Vzmeti Springs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 22705-3
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 21.160
English Version
Springs - Measurement and test parameters - Part 3: Cold
formed cylindrical helical torsion springs (ISO 22705-
3:2024)
Ressorts - Mesures et paramètres d'essai - Partie 3: Federn - Mess- und Prüfgrößen - Teil 3: Kaltgeformte
Ressorts hélicoïdaux de torsion cylindriques formés à zylindrische Schraubenfedern (ISO 22705-3:2024)
froid (ISO 22705-3:2024)
This European Standard was approved by CEN on 29 September 2025.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22705-3:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 22705-3:2024 has been prepared by Technical Committee ISO/TC 227 "Springs” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 22705-3:2025
by Technical Committee CEN/TC 407 “Technical springs” the secretariat of which is held by AFNOR.
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 April 2026, and conflicting national standards shall be
withdrawn at the latest by April 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 22705-3:2024 has been approved by CEN as EN ISO 22705-3:2025 without any
modification.
International
Standard
ISO 22705-3
First edition
Springs — Measurement and test
2024-04
parameters —
Part 3:
Cold formed cylindrical helical
torsion springs
Ressort — Mesures et paramètres d'essai —
Partie 3: Ressorts à torsion cylindrique, enroulés à froid
Reference number
ISO 22705-3:2024(en) © ISO 2024

ISO 22705-3:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 22705-3:2024(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Symbols and abbreviated terms .2
4 Environmental conditions . 4
5 Qualifications of the person(s) performing the work . 5
6 Geometries of guiding and supporting devices . 5
7 Measuring and testing equipment . 5
8 Measurement and test parameter for technical cold formed cylindrical torsion springs . 5
8.1 Body length (L ) .5
B
8.1.1 General .5
8.1.2 Type of characteristic .5
8.1.3 Measuring and/or testing equipment .5
8.1.4 Conditions of measurement and testing .6
8.1.5 Method of measurement and testing .6
8.1.6 Test location on the product.7
8.2 Outside diameter (D ).7
e
8.2.1 General .7
8.2.2 Type of characteristic .8
8.2.3 Measurement and/or testing equipment .8
8.2.4 Conditions of measurement and testing .8
8.2.5 Method of measurement and testing .8
8.2.6 Test location on the product.10
8.3 Inside diameter (D ) .10
i
8.3.1 General .10
8.3.2 Type of characteristic .11
8.3.3 Measurement and/or testing equipment .11
8.3.4 Conditions of measurement and testing .11
8.3.5 Method of measurement and testing .11
8.3.6 Test location on the product. 13
8.4 Spring leg length (l) . .14
8.4.1 General .14
8.4.2 Type of characteristic .14
8.4.3 Measurement and/or testing equipment .14
8.4.4 Conditions of measurement and testing . 15
8.4.5 Method of measurement and testing . 15
8.4.6 Test location on the product. 15
8.5 Number of coils (n) and coil direction . 15
8.5.1 General . 15
8.5.2 Type of characteristic .16
8.5.3 Measurement and/or testing equipment .16
8.5.4 Conditions of measurement and testing .16
8.5.5 Method of measurement and testing .16
8.5.6 Test location on the product.17
8.6 Bending radius on legs (r) .
...