A rotary cutting tool

Abstract

The present invention relates to a rotary cutting tool (100) for trim and rout operations of materials, particularly carbon fibre reinforced plastics. The rotary cutting tool (100) comprises a cylindrical shaft body including a cutting portion (1) and a shank portion (2) extending from the cutting portion (1), in which the cylindrical shaft body is rotatable in a direction of rotation about a longitudinal axis. A plurality of left-hand helical flutes intersects with a plurality of right-hand helical flutes around a circumference of the cutting portion (1). A plurality of cutting teeth are disposed at intersections formed by the left-hand helical flutes and the right-hand helical flutes. The cutting teeth protrude and curve towards the direction of rotation with a tapering end. The cutting teeth have a rake angle of positive 6 degrees. Further, the number of the left-hand helical flutes is 12, the number of the right-hand helical flutes is 8, the depth of the left-hand helical and the right-hand helical flutes is 0.6 mm and the helix angle for the left-hand helical flutes and the right-hand helical flutes is 24 degrees.