HM series For machining of hardened materials For machining of steel up to 68 HRC. Very stable cutting edge with high stiffness and newest coating technology for high cutting speeds and feed rates. End mills, ball nose cutters, torus mills and mini cutters Diameter range 0.3–20.0 mm Application fields for machining of steel HM PM GM 30 HRC 40 HRC 50 HRC 55 HRC 68 HRC very suitable suitable HM-2B HM-4E HM-4R HM-6E HM-4B HM-2E HM-2EP HM-2BP B 353