AS 2328-1980

1 - AS 2328-1980 MICROMETER HEADS - METRIC SERIES
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE.
5 - 1.2 CLASSIFICATION.
5 - 1.3 NOMENCLATURE.
5 - 1.4 DEFINITIONS.
5 - 1.5 MATERIALS AND HARDNESS.
5 - 1.5.1 Materials.
5 - 1.5.2 Hardness.
5 - 1.6 FINISH.
5 - 1.7 REFERENCE TEMPERATURE.
5 - 1.8 MARKING.
5 - 1.9 PROTECTION AGAINST DAMAGE AND CORROSION.
5 - 1.9.1 Protection Case.
5 - 1.9.2 Packaging.
6 - SECTION 2. DESIGN, GENERAL DIMENSIONS AND ACCURACY REQUIREMENTS
6 - 2.1 DESIGN AND GENERAL DIMENSIONS.
6 - 2.1.1 General.
6 - 2.1.2 Micrometer Spindle.
6 - 2.1.3 Micrometer Screw Thread.
6 - 2.1.4 Micrometer Thimble.
6 - 2.1.5 Graduations.
6 - 2.1.6 Spindle Clamp.
6 - 2.1.7 Ratchet Device.
6 - 2.1.8 Projection of Spindle.
6 - 2.1.9 Adjustments.
6 - 2.2 ACCURACY.
6 - 2.2.1 General.
6 - 2.2.2 Flatness of Measuring Face.
6 - 2.2.3 Squareness of the Measuring Face to the Axis of the Spindle
6 - 2.2.4 Squareness of the Measuring Face to the Outside Diameter of the Shank
6 - 2.2.5 Repetition of Reading.
6 - 2.2.6 Calibration of Micrometer Heads.
8 - APPENDIX A - RECOMMENDED METHODS OF TESTING MICROMETER HEADS
8 - A1 SCOPE.
8 - A2 FLATNESS OF MEASURING FACE.
8 - A3 SQUARENESS OF MEASURING FACE.
8 - A4 CALIBRATION OF THE MICROMETER HEAD.

Specifies general dimensions, material and accuracy for heads with rotating and non-rotating spindles. Information on calibration of the more important parameters of the heads is in an appendix.

This standard specifies micrometer heads having measuring ranges of 13 mm or 25 mm respectively, and applies to micrometer heads with either rotatable or non-rotatable spindles.NOTE: Whilst specific reference is not made to digital-readout micrometer heads such micrometer heads should meet the accuracy and performance requirements given in Clause 2.2 and Table 2.2.