The Carmex MTSB Mini Mill-Thread is a compact, solid carbide thread milling cutter with an integrated through-coolant bore, designed for precise UN-threading in tight spaces. Built for machinists and manufacturers working with small, high-precision threaded holes, it delivers clean threads with efficient cooling and chip evacuation.

• Through-coolant bore: Internal coolant delivers high-pressure flow directly through the tool into the pre-hole, washing away chips as you thread and keeping the cutting edge cooler under load.
• Mini mill-thread design: A compact cutter optimized for small-diameter threads, ideal for deep or crowded features where space is limited.
• UN thread capability: Supports UNC, UNF, UNEF and UNS thread forms, enabling versatile threading across common Unified threads.
• Solid carbide MT7 grade: Built from a high-hardness MT7 carbide substrate for wear resistance and steady performance in demanding materials.
• Through-tool compatibility: MT7-compatible interface (Morse Taper 7) to fit a range of compact, rigid milling setups and automated systems.
• Cutting diameter option: Precision-cut diameter around 7/16" for small-diameter threading applications that demand tight tolerances.

This tool is ideal for applications where small, precise UN threads are required in limited or hard-to-reach pockets—such as automotive components, aerospace fasteners, and precision mechanical assemblies. The integrated coolant bore not only helps maintain a sharp cutting edge but also improves surface finish by efficiently managing heat and nonferrous or alloy chip evacuation. When choosing a lightweight, high-precision thread mill for tight tolerances, the MTSB Mini Mill-Thread provides reliable performance in through-holes and challenging geometries, with the durability of solid carbide and the efficiency of through-coolant cooling.