Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical with ISO 1985 : 2015 ‘Machine tools - Test conditions for surface grinding machines with vertical grinding wheel spindle and reciprocating table - Testing of the accuracy’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Machine Tools, Machine Tool Elements and Holding Devices Sectional Committee and approval of the Production and General Engineering Division Council.

This standard was originally published in 1992 which was identical with ISO 1985 : 1985 ‘Test chart for surface grinding machines with vertical grinding wheel spindle and reciprocating table’. The first revision of this standard has been undertaken to align it with the latest version of ISO 1985 : 2015.

The major changes in this revision are as follows:

a) This revision of this part of the standard provides additional information on tests to be performed and specifies new tolerances to better reflect the current technology; and

b) Machining tests have been excluded from this revision of this part of the standard considering that such tests can typically be the object of agreement between manufacturer/supplier and user.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear, referring to this standard, they should be read as ‘Indian Standard’.

b) Comma ( , ) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point ( . ) as the decimal marker.