HPC series High Performance Cutter (HPC) For roughing and finishing of steel up to 55 HRC, stainless steel and cast iron. Geometry with unequal helix angle (38°/41°) and unequal pitch for smooth machining without vibrations. End mills and torus mills Diameter range 4.0–20.0 mm 5501R38414GM 5502R38414GM-R 5502R38414GM B 407