ISO 22705-3:2024

Springs — Measurement and test parameters — Part 3: Cold formed cylindrical helical torsion springs

This document specifies the measurement and test methods for general characteristics of cold formed cylindrical helical torsion springs made from round wire, excluding dynamic testing.

Ressorts — Mesures et paramètres d'essai — Partie 3: Ressorts hélicoïdaux de torsion cylindriques, formés à froid

General Information

• Status: Published
• Publication Date: 04-Apr-2024
• ICS: 21.160 - Springs
• Technical Committee: ISO/TC 227 - Springs
• Drafting Committee: ISO/TC 227 - Springs
• Current Stage: 6060 - International Standard published
• Start Date: 05-Apr-2024
• Due Date: 17-Aug-2024
• Completion Date: 05-Apr-2024

Standards Content (Sample)

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 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ISO copyright office
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Published in Switzerland
ii
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) .17
8.6.1 General .17
8.6.2 Type of characteristic .17
8.6.3 Measurement and/or testing equipment .17
8.6.4 Conditions of measurement and testing .18
8.6.5 Method of measurement and testing .18

iii
8.6.6 Test location on the product.18
8.7 Angle of bend on legs (φ) .18
8.7.1 General .18
8.7.2 Type of characteristic .18
8.7.3 Measurement and/or testing equipment .19
8.7.4 Conditions of measurement and testing .19
8.7.5 Method of measurement and testing .19
8.7.6 Test location on the product. 20
8.8 Spring pitch (p)/distance between the coils (u) . 20
8.8.1 General . 20
8.8.2 Type of characteristic . 20
8.8.3 Measurement and/or testing equipment .21
8.8.4 Conditions of measurement and testing .21
8.8.5 Method of measurement and testing .21
8.8.6 Test location on the product.21
8.9 Spring torque (M) . .21
8.9.1 General .21
8.9.2 Type of characteristic .21
8.9.3 Measurement equipment . 22
8.9.4 Conditions of measurement . . 22
8.9.5 Method of measurement . 22
8.9.6 Test location on the product. 23
8.10 Free angle (γγ ) .
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