Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 3) (First Revision) which is identical with ISO 11901-3 : 2021 ‘Tools for pressing - Gas springs - Part 3 : Gas spring with increased spring force and compact built height’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Metal Forming Machines Sectional Committee and approval of the Production and General Engineering Division Council

This standard was originally published in 2019 identical with ISO 11901-3 : 2014. The first revision of this standard has been undertaken to align it with the latest version of the International Standard.

The major changes in this revision are as follows:

a)Modification of the nominal initial force of gas springs type 7 500 and 10 000, from 7 500 to 7 400 andfrom 10 000 to 9 200;

b)Modification of the end of stroke nominal force increase coefficient to have a range from 1.5 to 1.8 for allgas springs;

c)Deletion of tolerance on l6 in Table 2; and

d)Replacement of length l4 with diameter d3 in Table 3 and in Fig. 3, Fig. 4 and Fig. 5.