The Carmex MTB Solid Carbide Through-Coolant Thread Mills are designed for precision internal threading in hard-to-machine materials. Built for engineers and shops that demand clean, accurate UNC/UNF/UNEF/UNS threads with extended tool life, these cutters combine carbide rigidity with innovative cooling through the bore.

• Through-Coolant Bore: Delivers coolant directly to the cutting edge for superior chip evacuation and cooling, enabling deeper, more consistent threads and reducing re-cutting risks.
• Solid Carbide Construction: Provides high rigidity, wear resistance, and stable tolerances—ideal for demanding materials and tight thread standards.
• MT7 Shank: Designed for secure, vibration-resistant performance in MT7 toolholders, delivering precise results with every pass.
• Thread Forms Supported: Optimized for internal threads in UNC, UNF, UNEF, and UNS profiles, increasing versatility across common metric and inch thread standards.
• Diameter and Length Range: Available for 9/16" and 5/8" nominal diameters with threading options up to 1-1/8" and 1-5/8"-18, enabling a broad set of standard thread applications.

The MTB line advances the MT family by incorporating through-bore coolant, which not only improves chip clearance and surface finish but also prolongs tool life by reducing heat at the cutting edge. This means fewer tool changes, more consistent thread quality, and lower cost per produced thread. Ideal for precision-oriented shops tackling aerospace, hydraulic, and automotive components where reliable internal threading is critical, these thread mills help you achieve clean, repeatable results in harder materials without sacrificing productivity.