Carmex MTB solid carbide thread mills with Through Coolant deliver precise, clean internal threads in demanding materials. Designed for engineers and shops that demand chip-free holes, consistent tolerances, and extended tool life in MT7 applications.

• Through coolant bore: Integrated coolant pathway cools the cutting edges and evacuates chips inside the hole, improving efficiency and reducing thermal stress.
• Solid carbide construction: High rigidity and wear resistance for accurate threading and longer tool life in tough metals.
• DIN 40430 compatibility: Available for PG sizes PG21, PG29, PG36, PG42, and PG48 to fit standard internal threading operations.
• MT7 shank: Robust, secure interface for dependable toolholding on high-speed spindles.
• MTB line innovation: Builds on the proven MTB platform with cutting-edge cooling-through-bore technology for enhanced performance and longevity.

The through-coolant design addresses heat management and chip control head-on. By directing coolant through the bore, cutting temperatures stay lower, edge wear is minimized, and surface integrity of the threaded hole is preserved. Enhanced chip evacuation reduces the risk of re-cutting in deeper threads, helps maintain precise thread profiles, and extends tool life—translating to higher uptime, lower tooling costs, and more consistent results in production runs, mold making, automotive components, and hydraulic assemblies.