Indexable Inserts for Cutting Tools — Ceramic Inserts with Rounded Corners — Part 1: Dimensions of Inserts without Fixing Hole (Class G)
1 Scope
This part of GB/T 15306 specifies the dimensions of indexable ceramic inserts with rounded corners, without fixing hole, with 0° and 11° normal clearance, and with accuracy of Class G. These inserts are primarily intended to be mounted by top clamping on turning and boring tools.
This part is applicable to the indexable ceramic inserts with rounded corners, without fixing hole (Class G).
Ceramic cutting materials consist of a variety of oxides, nitrides, carbides and metals. Such ceramic materials are, for example, oxide ceramics (consisting primarily of aluminium oxide Al2O3), carboxide ceramics (consisting generally of a mixture of aluminium oxide and other materials such as titanium carbide TiC) and nitride ceramics (consisting generally of a mixture of silicon nitride and other materials, such as yttrium oxide Y2O3 and aluminium oxide).
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 15306. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2075 Classification and Application of Hard Cutting Materials for Metal Removal with Defined Cutting Edges — Designation of the Main Groups and Groups of Application (GB/T 2075-2007, ISO 513:2004, IDT)
GB/T 2076 Indexable Inserts for Cutting Tools — Designation (GB/T 2076-2007, ISO 1832:2004, MOD)
GB/T 15306.4 Indexable Inserts for Cutting Tools — Ceramic Inserts with Rounded Corners — Part 4: Specifications
3 Types of Inserts
The types of indexable ceramic inserts specified in this part are the following:
TN: triangular inserts, with 0° normal clearance;
TP: triangular inserts, with 11° normal clearance;
SN: square inserts, with 0° normal clearance;
SP: square inserts, with 11° normal clearance;
CN: rhombic inserts, with 0° normal clearance and 80° included angle;
DN: rhombic inserts, with 0° normal clearance and 55° included angle;
RN: round inserts, with 0° normal clearance.
Inserts dealt with in this part are standardized without chip breakers.
In general, the inserts are used with chamfered or rounded cutting edges, see Clause 5.
Table B.1 gives the range of sizes for the inserts (see Annex B).
4 Tolerances
The indexable ceramic inserts which are the subject of this part are provided in tolerance class G, in accordance with GB/T 2076.
The values of the tolerances in accordance with GB/T 2076 are given in Table 2 to Table 5 for the insert dimensions.
5 Cutting Edge
5.1 Cutting edge condition
Foreword II
1 Scope
2 Normative References
3 Types of Inserts
4 Tolerances
5 Cutting Edge
6 Designation and Marking
7 Measurement
8 Recommended Dimensions
9 Example of Marking
10 Specifications
Annex A (Informative) Method of Measurement of Dimension m
Annex B (Informative) Range of Sizes of Inserts with Rounded Corners, without Fixing Hole, Having Shapes Covered by This Standard
