Introducing the Carmex Thread Mills Mini Type MT7—a precision carbide thread mill built for intricate threading tasks in hard materials and deep bores. It’s designed for machinists who need reliable internal and external threading with fast cycle times.

• No. 4 x 40 size: Specifically engineered for Unified thread standards (UNC, UNF, UNEF, UNS) with a compact mini-format for tight spaces.
• Material: Sub‑Micron MT7 carbide for exceptional rigidity, wear resistance, and long tool life.
• Coating: Titanium Aluminium Nitride (TiAlN) multi‑layer coating, providing a durable triple protection and improved performance at higher speeds.
• Flute design: 3–5 spiral flutes that deliver a smooth cutting action and efficient chip evacuation, ideal for through‑coolant applications.
• Through-coolant capability: Coolant flushed directly through the flutes enhances cooling and debris removal in deep-hole threading.
• Cutting performance: Optimized for medium to high cutting speeds with a short profile that reduces cutting forces and stabilizes operation.
• Depth and reach: Short profile combined with through-coolant enables reliable threading in deep holes without tool deformation.
• Versatility: One tool can produce both external and internal threads across a wide range of pitches, simplifying setups and inventories.
• Material hardness: Capable of machining hardened materials up to 45 HRc, expanding its use in demanding production environments.
• Durability: Special triple coating and optimized geometry contribute to longer tool life and consistent performance across jobs.

This thread mill is a practical choice for high‑precision manufacturing scenarios where durable tooling and versatile threading are essential. Its combination of MT7 carbide substrate, TiAlN coating, multi‑flute geometry, and through‑coolant design helps you achieve accurate thread forms, reduced cycle times, and fewer tool changes in challenging materials and deep bores.