Carmex Thread Mills Solid Carbide - Fast Type - With Internal Coolant Bore - UN (UNC UNF UNEF UNS) - 7/16, 7/8 x 14 - MT8

Meet Carmex’s Fast MT (FMT) solid carbide thread mills—precision tools engineered for high-speed internal threading on tough materials. Designed for shops that demand repeatable, accurate UN threads (UNC, UNF, UNEF, UNS) with shorter cycle times, this MT8 shank family delivers reliable performance in production environments.

• Cutting diameter and thread size: Cutting diameter 7/16 in with capability to thread up to 7/8-14 (UNC/UNF/UNE... UNS) using a single, reliable tool
• No. of flutes: 5–8 flutes for significantly shorter machining times and efficient material removal
• Internal coolant bore: Built-in coolant channel for effective cooling and chip evacuation, especially in blind holes
• Shank: MT8 (Morse Taper 8) shank for robust toolholding and rigidity
• Coating/Grade: MT8-grade carbide with AlTiN (blue) coating options for enhanced wear and heat resistance
• Thread compatibility: Optimized for internal UN thread forms (UNC, UNF, UNEF, UNS) with precise thread geometry

The Fast MT family is designed to maximize productivity without compromising thread quality. The combination of multiple flutes and a through/internal coolant bore enables rapid cutting while maintaining clean, accurate threads in demanding materials. This makes the tools particularly well-suited for high-volume manufacturing and precision threading tasks where cycle time and surface finish matter. In practical tests, FMT thread mills have demonstrated markedly shorter cycles and reliable thread accuracy in challenging steels, thanks to their rugged MT8 carbide core and through-coolant capability.