120 Series

Tool 120i156A

Small diameter ball nose work in hardened steels requires a cutter that can handle interrupted cuts without chipping.

Ball nose geometry at 0.1563" cutting diameter follows contoured surfaces without leaving flat-bottomed transitions.
The 0.1563" cutting diameter handles detailed profiling work where larger cutters cannot reach.
Three flutes provide adequate chip evacuation while maintaining rigidity at this diameter.
The TiAlSiN coating adds wear resistance and thermal stability when working hardened materials or high-temperature alloys like titanium.
This coating extends tool life in applications where uncoated carbide would wear rapidly from heat buildup.
The rounded tip produces smooth transitions on contoured surfaces and eliminates the step marks common with square end mills on curved geometry.