Carmex Mini Type thread mills with an internal through-coolant bore are precision solid carbide cutters designed for reliable UN/UNC/UNF/UNEF/ UNS threading. Sized No. 3 and No. 4 with a 48 mm length and MT7 shank, they’re built for tight spaces and demanding production environments.

• Solid carbide construction: High-hardness, wear-resistant cutter designed for accurate, repeatable threads in challenging materials.
• Through-coolant bore: Internal cooling channel delivers high-pressure coolant directly through the tool into the pre-hole, enhancing chip evacuation and edge cooling.
• Thread forms supported: Optimized for UNC, UNF, UNEF, and UNS thread types to cover a broad range of fastening applications.
• Mini MTSB design: Compact geometry engineered for threading in small or confined holes without compromising rigidity.
• Size and interface: No. 3 and No. 4 options, 48 mm overall length, MT7 shank to fit common milling machines and tooling systems.
• Chip control and efficiency: Coolant-assisted cutting helps purge chips during the threading circle, reducing clogging and improving surface finish.
• Edge cooling and tool life: Direct cooling of the cutting edge minimizes heat buildup, contributing to longer tool life and steadier cutting performance.

This through-coolant thread mill delivers cleaner, more consistent threads by combining precise carbide geometry with effective coolant delivery. It’s especially valuable in production settings where rapid chip removal and reliable cooling translate to tighter tolerances, reduced rework, and improved cycle times when threading through holes in metals and alloys.