Amana Tool 46207 Solid Carbide Spiral Plunge 1/2 Dia x 1-5/8 x 1/2 Inch Shank Down-Cut Tajima including rails

including rails

as shown in the ghosted drawing

In cases where the carbide tip cutting edges are coated

a 1/2" shank arbor with a pilot bearing

Amana Tool 46207 Solid Carbide Spiral Plunge 1/2 Dia x 1-5/8 x 1/2 Inch Shank Down-Cut Tajima including railsSpiral flute bits combine a shearing action in cutting with an augering action in chip clearance. The shearing action yields an especially clean accurate cut while the augering action clears chips from the cut. The Down Cut cuts from the surface down leaving a smooth edge at the surface. Special unique carbide grade increased clearance geometry and razor sharp cutting edges with polished flutes provide a superior finish and longer tool life especially