The Carmex Spiral Mill Threading Insert is a versatile threading solution designed for CNC milling that specializes in creating accurate NPT threads with high efficiency. Suitable for a wide range of workpieces—from small components on compact machining centers to heavy-duty operations on high-power mills—these spiral inserts deliver fast material removal with consistent thread quality.

Grounded in spiral flute design, this tool minimizes vibration and chatter while improving finish and reliability across threading, end milling roughing, and finishing tasks. The inserts use MT7 Sub-Micron Grade with a multi-layer Titanium Nitride coating, offering broad material compatibility and durable wear resistance right out of the box.

• Smooth cutting at high feed rates: The spiral design enables a smooth cutting operation at high feed rates, reducing machining time and boosting productivity.
• Flexible insert count and precise indexability: Spiral toolholders support 1 to 9 inserts in a compact cutting diameter, with a unique clamping method that ensures optimal indexability and stable operation.
• Coated MT7 inserts for wide material compatibility: Sub-Micron MT7 inserts with Titanium Nitride multi-layer coating (ISO K10-K20) deliver long tool life and reliable results across a broad range of materials, from soft to hard alloys.

With this spiral mill threading insert, you can expect smoother operation, reduced downtime, and consistent, high-quality threads across projects. The combination of high-performance geometry, secure indexing, and durable coating helps streamline setup, extend tool life, and produce dependable results—from prototype runs to high-volume production.