INDEXABLE DRILL

摘要

An indexable drill according to an embodiment of the present invention can ensure a larger chip discharge space constituting the indexable drill so as to smoothly discharge chips, can further improve the chip discharge effect by providing a flute with a constant flute helix angle over the entire section, can improve the processing quality by providing the flute with a rotation angle of 90 degrees to 115 degrees, and can improve the durability of the indexable drill by applying a concave surface shape to a flute extension portion of the flute.