The SCMT 120408 series by Kennametal is a premier industrial solution for profiling and internal boring operations.
The "S" prefix identifies its 90-degree square shape, offering four sharp, highly economical cutting edges per insert.
Engineered with a positive 7-degree relief angle ("C"), it cuts smoothly through stock rather than pushing against it.
A precise counterbored central screw hole ("T") allows the insert to sit flush inside compact, rigid tool holder pockets.
The "12" dimension code specifies a large 12.7 mm inscribed circle profile, providing excellent strength during deep cuts.
A thick 4.76 mm core profile ("04") ensures the carbide base resists sudden snapping under heavy mechanical forces.
The standard 0.8 mm corner radius ("08") delivers a strong cutting tip while generating highly polished component finishes.
The defining driver of its high tool life is Kennametal's proprietary KCS10 advanced industrial-grade coating platform.
This grade features an ultra-fine-grained tungsten carbide substrate paired with a multi-layered AlTiN PVD ceramic film.
This high-density outer layer creates a reliable thermal shield that stops processing heat from bleeding into the tool core.
It is engineered specifically for ISO Class S materials, easily handling nickel, cobalt, and iron-based superalloys.
The razor-sharp edge preparation actively prevents built-up edge (BUE), a typical failure mode when turning sticky metals.
Machinists rely on this positive style to suppress machining chatter, especially inside long, slender internal boring bars.
Its high structural stability enables CNC operators to run at faster surface speeds and deeper depths of cut safely.
Ultimately, this Kennametal insert provides high reliability and precision across global aerospace, defense, and energy sectors.
