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Helix Angle: 45° to enable high-speed cutting with good rigidity and chip clearance
providing a secure and reliable connection between tool holders and cutting tools
Left-hand spiral flute with right-hand cutting: Enables efficient material removal and clean bore finishes
especially on small-diameter workpieces
Compatibility: Specifically designed to hold carbide small boring tools for reliable retention
Carmex Thread Mills Mini Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT9 Endmill25 Helix Angle: 45° to enableThe Carmex Thread Mills Mini Type is a precision solid carbide thread milling cutter designed for hard materials, delivering reliable No. 4 threads with a clean, accurate finish. Built for engineers and shops that regularly work with hardened steels and alloys, this compact tool pairs durability with high precision threading in tight spaces. Tool type: Solid carbide thread mill engineered for hard materials up to 62 HRc. Thread compatibility: Supports
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