Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Part 2) (First Revision) which is identical with ISO 3070-2 : 2016 ‘Machine tools - Test conditions for testing the accuracy of boring and milling machines with horizontal spindle - Part 2: Machines with movable column along the X-axis (floor type)’ 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 3070-2 : 1978 ‘Test chart for boring and milling machines with horizontal spindle - Part 2: Floor type machines’. The first revision of this standard has been undertaken to align it with the latest version of ISO 3070-2 : 2016.

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.

This Indian Standard is published in three parts. The other parts in this series are:

Part 1 Machines with fixed column and table movable on a cross slide

Part 3 Machines with movable column along the Z-axis (T-bed type)

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology 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.