BS 1296-2:1972

Co-operating organizations
Foreword
Nomenclature
0 Scope
1 General
11 Tool terminology
12 Tool dimensions
2 Types, shapes and styles of single-point
21 Types
22 Shapes
23 Styles
3 Hand of single-point tools
4 Tool elements
41 Basic location concepts
42 Tool surfaces
43 Cutting edges
5 General cutting terms
51 Surfaces on the workpiece
52 Tool and workpiece motions
53 Dimensions
6 Reference systems of planes
61 Tool-in-hand system
62 Tool-in-use system
7 Tool and working angles
71 Tool angles
72 Working angles
Appendix
A Summary of angles
Tables
1 Symbols for land widths associated with the face
     and flanks
2 Symbols for the rake and clearance on the lands
     for the major and minor cutting edges
3 List of symbols
Figures
1 General terms and tool elements
2 General terms and tool elements
3 Tipped single-point and indexable insert single-
     point tools; toolholder bit and stick insert
4 Solid, butt-welded and deposit-tipped single-point
     tools
5a Cranked and straight tools
5b Offset and raised face tools
5c Swan-necked and raised cutting edge tools
6 Shanked boring, parting and tangential tools
7 Right hand and left hand tools
8 General terms and tool elements
9 General cutting terms
10 Tool and workpiece motions
11 Corner dimensions
12 Tool surfaces and land widths
13a Tool-in-hand system of planes
13b Tool-in-hand system of planes
14 Examples of tool-in-hand planes associated with the
     minor cutting edge
15 Choice of Pr and Pf for a shanked boring tool
16 Choice of Pr and Pf for a parting tool
17 Choice of Pr and Pf for a tangential tool
18a Tool-in-use system of planes
18b Tool-in-use system of planes
19 Tool-in-use planes showing the effect of feed
     motion on the orientation of Pre in relation to Pr
20a Orientation of the cutting edges for the tool-in-
     hand
20b Orientation of the cutting edges for the tool-in-
     hand
20c Orientation of the cutting edges for the tool-in-
     hand
21a Tool angles - normal rake system for a straight
     tool
21b Tool angles - normal rake system for a tangential
     tool
22 Tool normal rake and clearance angles
23 Tool angles - tool base clearance alpha b
24a Working angles (general case) - normal rake system
     for a straight tool
24b Working angles (general case) - normal rake system
     for a tangential tool
Alphabetical index

Nomenclature, definitions for rake, clearance and other angles for a cutting tool to fulfil the requirements of the system known as \'normal rake system\'. Sketches and diagrams appended. Based on terms and principles developed by ISO, but anticipates formal international agreement on some aspects of the nomenclature.

This British Standard defines terms for certain basic concepts concerning single-point cutting tools; it deals with those features which are necessary to define the geometry of the cutting part. The first three sections define general terms applicable to single-point tools, the types and shapes of single-point tools and the hand of tools, respectively. Subsequent sections define tool elements, tool surfaces, cutting edges, surfaces on the workpiece, tool and workpiece motions and certain specific dimensions.

Two reference systems of planes are defined, with the aid of which so-called “tool angles?? and “working angles?? are defined. One reference system of planes is the “tool-in-hand?? system; this is used to define the geometry of the tool so that it can be manufactured, sharpened and measured. The other reference system of planes, the “tool-in- use?? system, is required to define the effective geometry of the tool when it is actually performing a cutting operation.

The angles resulting from tool and workpiece motions, together with the tool and working angles defined in Section 7, are summarized in tabular form in Appendix A.