AS 2102-1989

1 - AS 2102-1989 MICROMETER CALLIPERS FOR EXTERNAL MEASUREMENT
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE AND FIELD OF APPLICATION
5 - 2 REFERENCE
5 - 3 NOMENCLATURE AND DEFINITIONS
5 - 3.1 For the nomenclature for micrometer callipers, see figure 1.
5 - 3.2 error of measurement
5 - 3.3 deviation of traverse of the micrometer screw
6 - 4 SPECIFICATION
6 - 4.1 Design features
6 - 4.1.1 Frame
6 - 4.1.2 Spindle and anvil
6 - 4.1.3 Spindle clamp
6 - 4.1.4 Friction or ratchet drive
6 - 4.1.5 Thimble
6 - 4.1.6 Barrel
6 - 4.1.7 Adjustments
6 - 4.1.8 Marking
7 - 5 ACCURACY
7 - 5.1 General
7 - 5.2 Deviations and tolerances
7 - 5.3 Error of measurement
7 - 5.4 Measuring faces
8 - ANNEX A - ERROR OF MEASUREMENT AT ANY POINT IN THE MEASURING RANGE
9 - ANNEX B - RECOMMENDED PRACTICE FOR USING A MICROMETER CALLIPER
10 - ANNEX C - RECOMMENDED METHODS OF TESTI NG EXTERNAL MICROMETER CALLIPERS
10 - C.1 MEASURING FACES
10 - C.1.1 Flatness
10 - C.1.2 Parallelism
10 - C.2 MICROMETER SCREW
10 - C.3 RATCHET OR FRICTION DRIVE

Specifies the dimensional, functional, and quality characteristics of micrometer callipers for external measurement. It applies to micrometers with a screw having a lead of 0.5 mm or 1 mm, having a maximum range of 25 mm in capacities up to 500 mm, and having non-removable anvils with flat measuring surfaces. Annexes give information concerning values for the error of measurement at any point in the measuring range, and recommendations for using an instrument and determining its accuracy. It is identical with and has been reproduced from ISO 3611:1978.