AS 2158-1978

1 - AS 2158-1978 CARBIDE INSERTS FOR CUTTING TOOLS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1. SCOPE AND DEFINITIONS
7 - 1.1 SCOPE
7 - 1.2 DEFINITION.
7 - 1.2.1 Shall and ‘Should’
7 - 1.2.2 Insert.
8 - 1.2.3 Hand of cutting
9 - SECTION 2. CLASSIFICATION
9 - 2.1 GENERAL.
9 - 2.2 SYMBOLS
9 - 2.2.1 Insert Shape
11 - 2.2.2 Clearance Angle
11 - 2.2.3 Tolerance
11 - 2.2.4 Special Features
14 - 2.2.5 Size
14 - 2.2.6 Thickness
14 - 2.2.7 Corner Configuration
14 - 2.2.8 Supplementary Feature, Cutting Edge Condition
16 - 2.2.9 Supplementary Feature, Cutting Direction
16 - 2.2.10 Other Symbol
17 - SECTION 3. REQUIREMENTS
17 - 3.1 STANDARD RANGE OF PRECISION AND UTILITY INSERTS.
17 - 3.2 FINISH
17 - 3.2.1 Precision Tolerance Inserts.
17 - 3.2.2 Utility Tolerance Inserts
17 - 3.3 MARKING.
17 - 3.4 ATTACHMENT HOLE DIAMETER.
44 - APPENDIX A - APPLICATION OF CARBIDES FOR MACHINING BY CHIP REMOVAL
44 - A1 INTRODUCTION.
44 - A2 CLASSIFICATION.
44 - A2.1 General.
44 - A2.2 Main Groups of Chip Removal.
44 - A2.3 Groups of Application.
47 - APPENDIX B - CHECKING OF DIMENSION m
49 - APPENDIX C - GENERAL TABLE OF COMPREHENSIVE RANGE OF INSERT SIZES

Provides a system of classification and a range of sizes for mechanically held carbide cutting tool inserts. It is in technical agreement with corresponding ISO documents, and in addition it includes round inserts and stick (on-end) type of inserts.

This specification provides a system of classification for various shapes and types of indexable inserts, and specifies the dimensions of a standard range of inserts. These inserts may be of carbide or other suitable materials, such as ceramic, and are limited to those held mechanically* in a tool holder.In Section 2 the shapes included are hexagonal, octagonal, pentagonal, round, square, triangular, and also rhombic and parallelogram-shaped. The types include alternatives of clearance angles, special features on one or both faces, circular attachment holes, and particular corner configurations.Dimensions and features for a standard range of inserts in precision (G) and utility (U) tolerance classes are provided in Section 3, as well as requirements for size of attachment holes for non-standard inserts.Appendices provide a further classification of carbides according to intended application, the method of measurement of dimension m, and reference details for a comprehensive range of inserts with guidance on preferred selections.

Reconfirmed 1987