STB125-250-4D (1/8 x 1/4 x 1/8 x 4, 2F, B, CRB, HC)

1/8 x 1/4 x 1/8 x 4, 2F, B, CRB, HC Carbide End Mill (Cut Dia. x Shank Dia. x LOC x OAL)  Advanced generation, super-dense carbide finishers / semi-finishers designed for rapid cutter path execution and pinpoint accuracy in cutting tool, die, and mold steels; up to 62 HRc.  SpeedTrace technical specifications: Engineered to finish mill die and mold steels up to 62 HRc  Carbide substrate is ultra high performance Nano-grain size; yielding optimum wear resistance, toughness & hot hardness  Multilayer coating provides highest oxidation threshold to mill hard steels using HSM (high speed machining) techniques  Application specific grind geometry facilitates a high percentage core diameter that maximizes rigidity and surface finish quality Shank tolerance:  -0.0001 / -0.0003, h6 (for shrink fit systems) Cutting Diameter tolerance:  +0.0000 / -0.0008 Radius tolerance:  +0.0000 / -0.0004