ISO 3364:2017

Overview

ISO 3364:2017 specifies the dimensional requirements for indexable hardmetal (carbide) inserts with rounded corners, a cylindrical fixing hole and 0° normal clearance. It defines standardized shapes, dimensional tables and measurement methods so inserts can be mounted by top-and-hole clamping or by hole-only clamping on turning and boring tools. The standard promotes interchangeability and consistent marking for commercial and engineering use.

Key Topics

• Scope and purpose: dimensions for inserts primarily intended for turning and boring, with rounded corners and cylindrical fixing holes, and 0° normal clearance.
• Types of inserts: standardized shapes covered include triangular (TN), square (SN), rhombic (CN, DN, VN), hexagonal/trigon (WN) and round (RN) variants, with options for chip breakers on one face, both faces, or none.
• Dimensional tables: recommended sizes and preferred ranges are provided in Tables 2–8 and expanded in Annex B. Figures illustrate each shape for clarity.
• Interchangeability and tolerances: inserts are supplied in tolerance classes in accordance with ISO 1832; fixing hole diameters are related to the insert inscribed circle (see Table 1) to ensure proper mounting and interchangeability.
• Designation and marking: designations follow ISO 1832; optional indications include the application group symbol per ISO 513 and the commercial carbide grade. Minimum marking requirements for insert surfaces are specified.
• Measurement methods: Annex A defines how to measure critical dimensions (for example the “m” dimension) to ensure consistent verification.
• Informative guidance: Annex B lists the recommended range of sizes; Annex C maps designations to ISO 13399 representations.

Applications

• Manufacturers of cutting inserts and tool holders use ISO 3364:2017 to design compatible inserts and tool systems.
• Tool designers and machine shops rely on the standard to select interchangeable inserts for turning and boring operations, ensuring mounting fit and predictable cutting geometry.
• Purchasing and quality departments use the standard to specify dimensions, tolerances and marking requirements in procurement and inspection.
• CNC and metalworking engineers benefit from standardized insert geometries when optimizing tool paths, tool changeovers and inventory.

Related Standards

• ISO 1832 - designation and tolerance classes for indexable inserts (referenced for interchangeability).
• ISO 513 - classification and application groups for hard cutting materials (used for application symbols).
• ISO 13399 - tool data representation (Annex C relates designations to ISO 13399).

Keywords: ISO 3364:2017, indexable carbide inserts, rounded corners, cylindrical fixing hole, dimensions, turning and boring tools, insert tolerances, interchangeability, ISO 1832.