The Carmex Vertical Milling CMT Three Flute Insert for Groove Milling (C12W141) is a precision indexable insert paired with compatible vertical-mill tool holders, designed to tackle grooves, threads, chamfers, and related milling tasks. Its three-flute geometry and ground profile help deliver clean, accurate cuts across a variety of materials.

Built for professional shops and serious hobbyists alike, this system emphasizes precision, repeatability, and ease of use. Ground profile inserts ensure tight tolerances and smooth surface finishes, while a solid, accurate clamping method enables full repeatability across jobs. The same insert works for both right-hand and left-hand threads, and the toolholders include a Weldon shank and coolant bore for flexible, reliable operation.

• Ground-profile inserts for precision: Delivers tight tolerances and consistent performance for accurate groove milling and threading with excellent surface finish.
• High-parameter cutting with quality surface: Engineered to perform at higher machining parameters while maintaining a high-quality finish, reducing need for rework.
• Solid, repeatable clamping and versatile threading: Robust, precise clamping provides full repeatability; same insert supports right- or left-hand threads, with Weldon shank toolholders and coolant bore, and chamfer inserts available.

In practice, this means faster setup, fewer adjustments, and dependable results on demanding groove and thread milling. The combination of ground-profile inserts, reliable clamping, and a complete tooling ecosystem helps you achieve consistent part quality, reduce downtime, and simplify maintenance across your milling workloads.