The Carmex Spiral Mill Threading Insert — Unified H17I16UNMT7 is a spiral-fluted threading insert designed for fast, smooth cutting across a wide range of milling and threading tasks. It’s built for both precision work on small machining centers and demanding, high-power milling applications, delivering shorter cycle times and reliable, consistent results.

Its spiral geometry enables a smooth cutting action at higher feed rates, helping reduce machining time without sacrificing finish. The toolholder design accommodates 1 to 9 inserts in a comparatively small cutting diameter, and the unique clamping method ensures optimal indexability while minimizing vibration and chatter. In addition, inserts are MT7 sub-micron grade with Titanium Nitride multi-layer coating (ISO K10-K20), a general-purpose option that performs well across all materials.

• Spiral geometry for fast, smooth cutting: Enables a steady, high-feed cutting action that reduces cycle times while maintaining a high-quality finish in threading and milling.
• Indexable multi-insert holder for small diameters: Holds 1–9 inserts in a compact cutting diameter with a unique clamp that ensures precise indexing and minimizes vibration and chatter.
• MT7 TiN-coated inserts for broad material compatibility: Sub-micron MT7 inserts with TiN coating deliver durable, reliable performance across materials, delivering consistent finishes in threading and end milling.

Together, the spiral geometry, flexible insert count, and durable MT7 TiN-coated inserts enable faster production, steadier cuts, and reliable results across threading and milling tasks. This combination helps reduce downtime, improve workflow consistency, and deliver predictable, high-quality finishes on a wide range of projects.