End-mill tool with high and low helical flutes and related method for rough cutting and finishing a workpiece

摘要

An end-mill tool has at least one low helix angle flute, or primary flute) and at least two low helix angle flutes, or secondary flutes. The primary and secondary flutes intersect to define a plurality of compound helical cutting surfaces. Each of the compound cutting surfaces includes a cutting edge having a leading portion formed adjacent one of the primary flutes and a trailing portion formed adjacent one of the secondary flutes.