AS 1003-1971

1 - AS 1003-1971 ENGINEERS' STRAIGHTEDGES - METRIC UNITS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1. GENERAL
7 - 1.1 SCOPE.
7 - 1.2 NOMENCLATURE.
7 - 1.3 TERMS AND DEFINITIONS.
7 - 1.3.1 Flatness Tolerance
7 - 1.3.2 Squareness Tolerance
7 - 1.3.3 Parallelism Tolerance
7 - 1.3.4 Bearing Surface
9 - 1.4 STANDARD SIZES.
9 - 1.5 METHODS OF SUPPORT.
9 - 1.5.1 General.
9 - 1.5.2 Cast-iron Bow-shaped Straightedges.
9 - 1.5.3 Cast-iron I-section Straightedges.
10 - 1.5.4 Steel Straightedges of Rectangular Section.
10 - 1.5.5 Stone Straightedges.
10 - 1. 5.6 Marking of Support Positions.
10 - 1.6 SIDE FACES AND CORNERS.
11 - 1.7 MARKING.
11 - 1.8 TESTING.
12 - 1.9 PROTECTION AGAINST DAMAGE AND DETERIORATION.
12 - 1.9.1 Permanent Protective Coatings.
12 - 1.9.2 Protection for Transportation and Storage.
12 - 1.9.3 Protective Covers.
12 - 1.9.4 Protection During Usage.
13 - SECTION 2. CAST- IRON STRAIGHTEDGES
13 - 2.1 BOW-SHAPED STRAIGHTEDGES-DESIGNAND DIMENSIONS.
13 - 2.2 I-SECTION STRAIGHTEDGES-DESIGN AND DIMENSIONS.
15 - 2.3 MATERIAL.
15 - 2.4 STABILIZING.
15 - 2.5 QUALITY.
15 - 2.6 FINISH.
15 - 2.7 AREA OF BEARING SURFACES.
15 - 2.8 SURFACE TEXTURE.
15 - 2.9 REQUIREMENTS FOR SIDE FACES.
16 - SECTION 3. STEEL STRAIGHTEDGES OF RECTANGULAR SECTION
16 - 3.1 DESIGN AND DIMENSIONS
16 - 3.2 MATERIAL
17 - 3.3 STABILIZING
17 - 3.4 FINISH
17 - 3.5 SURFACE TEXTURE
18 - SECTION 4. STONE STRAIGHTEDGES
18 - 4.1 DESIGN AND DIMENSIONS.
18 - 4.2 MATERIAL.
18 - 4.3 QUALITY.
19 - 4.4 FINISH.
20 - SECTION 5. ACCURACY
20 - 5.1 FLATNESS OF WORKING FACES.
20 - 5.2 LOCAL FLATNESS OF WORKING FACES.
20 - 5.3 PARALLELISM OF WORKING FACES.
20 - 5.4 FLATNESS OF SIDE FACES.
20 - 5.5 LOCAL FLATNESS OF SIDE FACES.
22 - 5.6 PARALLELISM OF SIDE FACES.
22 - 5.7 SQUARENESS OF SIDE AND WORKING FACES OF STEEL AND TYPE S STRAIGHTEDGES
23 - APPENDIX A - NOTES ON SUPPORTING OF STRAIGHTEDGES
25 - APPENDIX B - DETERMINATION OF BEARING AREA

Establishes main design features, general dimensions, material, finishes, methods and marking of support, and accuracies for cast-iron, steel and stone straightedges. It provides for three grades of accuracy and covers the range of sizes from 250 mm to 5000 mm in cast-iron and from 250 mm to 2000 mm in steel and in stone.

This standard relates to engineers' precision straightedges in metric units. It covers four standard types and provides for three grades of accuracy, as follows:Cast-iron Straightedges Bow-shaped Grades A and B Cast-iron Straightedges I-section Grades A and B Steel Straightedges Rectangular section Grades A and B Stone Straightedges Rectangular section Grades AA and AThe standard specifies requirements for dimensional accuracy, materials, general quality, finish, marking and packaging, together with those design features necessary to ensure convenience in use, rigidity, stability and durability of straightedges.It provides for two varieties of cast-iron straightedges differing in the accuracy of their side faces (see Clause 2.9) and designated Type N (normal) and Type S (special).NOTES:1. For engineers' straightedges in imperial units, see AS B307.2. For toolmakers' straightedges see AS B72.

Reconfirmed 1984, 1987