ISO 9361-1:2014

Overview

ISO 9361-1:2014 defines the dimensions and key specification rules for indexable ceramic inserts with rounded corners, without a fixing hole. It covers inserts intended primarily for top clamping on turning and boring tools and specifies forms with 0° and 11° normal clearance. The standard concentrates on geometric dimensions, designation, marking, measurement methods and recommended sizes for triangular, square, rhombic (80° and 55°), and round ceramic inserts.

Key topics and technical requirements

• Scope and insert types: standardized types include TN / TP (triangular), SN / SP (square), CN (rhombic 80°), DN (rhombic 55°) and RN (round) - the suffix indicates normal clearance (N = 0°, P = 11°).
• Dimensions and recommended sizes: detailed dimensional tables (Clause 8 and Tables 2–6) give nominal values for parameters such as inscribed circle (d), thickness (s), m-dimension and corner radius (r). Annex B lists the range of sizes and preferred (shaded/non‑shaded) selections.
• Tolerances: inserts are supplied in tolerance class G per ISO 1832; specific tolerance values for each dimension are provided referencing ISO 1832.
• Cutting edge condition: cutting edge types (chamfered/rounded) are selected per ISO 1832. Where chamfers are specified, additional information can be given as a five‑digit code: first three digits = b (in 0.01 mm), last two = γ (degrees).
• Designation and marking: designation follows ISO 1832; manufacturers may add the five‑digit cutting‑edge code and commercial ceramic grade; the grade symbol shall be marked on the insert where practicable.
• Measurement methods: Annex A prescribes methods for measuring the important m dimension for each shape (use of dial gauge, vee‑blocks, precision rollers, micrometers).
• Materials context: clarifies ceramic cutting materials (oxide, carboxide, nitride ceramics) and examples (Al2O3, TiC, Si3N4, Y2O3).

Practical applications - who uses this standard

• Tool designers and manufacturers specifying indexable ceramic inserts for turning and boring.
• CNC machining shops and tooling engineers selecting inserts for high‑speed or hard‑material applications.
• Purchasing and quality assurance teams verifying dimensional conformity, marking and tolerance class.
• Fixture and tool-holding vendors that design top‑clamp holders compatible with standardized insert dimensions.

Related standards

• ISO 1832 - Designation and tolerance rules for indexable inserts (normative reference in ISO 9361-1).
• ISO 9361 (other parts) - Part 2 covers inserts with cylindrical fixing hole.

Keywords: ISO 9361-1:2014, indexable ceramic inserts, rounded corners, dimensions, without fixing hole, top clamping, turning and boring, tolerance class G, ISO 1832.