Rotary cutting tool having a preset number of helical grooved directed to the left and to the right, and the teeth of cutting face of edge.

摘要

A rotary cutting tool (20) having a longitudinal axis geometric (), includes portions of cutting and assembly (22, 24).The cutting portion (22) includes a surface of face of end (28) and a peripheral surface (30) which extends from the same.The peripheral surface (30) includes a respective plurality of grooved main and auxiliary (32,34) which extend in the opposite direction spiral around the longitudinal geometrical axis (a).The cutting portion (22) includes a plurality of butchers circumferentially uniformly distributed edge (42) and a plurality of teeth of cutting face of the edge (48).The numbers of grooved grooved main (32) and auxiliary (34) are different.As each fully divisible by the number of teeth of cutting face of the edge (48) and greater than the same.In each view in cross-section of the cutting portion (22) an imaginary contour line (LC) defined by a peripheral contour (PC) of the peripheral surface of a tooth cutting face dAnd the edge (48) is aligned in relation giratoriamente, around the geometric axis longitudinal (a),With the peripheral contour (PC) of the peripheral surfaces (30) of all the other teeth of cutting face of the edge (48).