AS 2101-1978

1 - AS 2101-1978 INTERNAL MICROMETERS (INCLUDING STICK MICROMETERS) (METRIC SERIES)
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 APPLICATION.
6 - 1.3 NOMENCLATURE.
6 - 1.4 DEFINITIONS.
6 - 1.5 MATERIALS AND PROPERTIES.
6 - 1.5.1 Internal Micrometers.
8 - 1.5.2 Stick Micrometers.
8 - 1.5.3 Setting Gauges.
8 - 1.6 FINISH.
8 - 1.7 REFERENCE TEMPERATURE.
8 - 1.8 MARKING.
8 - 1.8.1 Internal Micrometer Sets.
9 - 1.8.2 Stick Micrometer Sets.
9 - 1.8.3 Setting Gauge.
9 - 1.9 PROTECTION AGAINST DAMAGE AND CORROSION.
9 - 1.9.1 Protective Case.
9 - 1.9.2 Packaging.
10 - SECTION 2. INTERNAL MICROMETERS (OTHER THAN STICK MICROMETERS)
10 - 2.1 SCOPE OF SECTION.
10 - 2.2 DESIGN AND GENERAL DIMENSIONS.
10 - 2.2.1 Measuring Head.
11 - 2.2.2 Adjustments and Zero Setting.
11 - 2.2.3 Spacing Collars.
11 - 2.3 ACCURACY AND PERFORMANCE
11 - 2.3.1 General.
11 - 2.3.2 Measuring Faces.
11 - 2.3.3 Abutment Faces.
12 - 2.3.4 Calibration of Measuring Head.
12 - 2.3.5 Zero Setting.
12 - 2.3.6 Rigidity.
12 - 2.3.7 Spacing Collars.
13 - SECTION 3. STICK MICROMETERS
13 - 3.1 SCOPE OF SECTION.
13 - 3.2 DESIGN AND GENERAL REQUIREMENTS.
13 - 3.2.1 Micrometer Unit.
14 - 3.2.2 Adjustments and Zero Setting.
14 - 3.2.3 Screwed Joints.
14 - 3.2.4 Extension Rods.
14 - 3.3 ACCURACY AND PERFORMANCE.
14 - 3.3.1 General.
14 - 3.3.2 Free Running.
14 - 3.3.3 Measuring Faces.
14 - 3.3.4 Calibration of Mi crometer Unit.
14 - 3.3.5 Extension Rods.
14 - 3.3.6 Rigidity.
15 - 3.4 SETTING GAUGES.
16 - APPENDIX A - METHODS OF TESTING INTERNAL MICROMETERS AND STICK MICROMETERS
16 - A1 GENERAL.
16 - A2 CALIBRATION OF THE MEASURING HEAD AND/OR MICROMETER UNIT
17 - A3 CALIBRATION OF INTERNAL MICROMETER SETS.
18 - A4 ACCURACY OF EXTENSION RODS FOR STICK MICROMETERS.

Specifies internal micrometers and stick micrometers reading to 0.01 mm and gives requirements for materials, properties, basic design details, accuracy and finish. An appendix gives notes on the assessment of the more important features of these instruments. For internal micrometers, sizes up to 900 mm and for stick micrometers sizes up to 1800 mm are covered. Requirements for setting gauges for use with these measuring instruments are also given.

This standard applies to internal micrometers, including stick micrometers, reading to 0.01 mm. It specifies materials and properties, design requirements and general dimensions, and also the setting gauges for stick micrometers, but it does not cover three-point contact bore micrometers used for other types of internal measurement.Appendix A sets out recommended methods of test for the more important metrological features.

Reconfirmed 1987
Under Revision See DR 96367