Beveling cutter having helical edged blades and discharge grooves

摘要

The present invention provides a beveling cutter including: a body with a shaft hole formed through the center; a plurality of 10 cutter blades (20) arranged at predetermined distances on the circumferential surface of the body, each having a radial primary blade (14) with a radial primary relief angle (a) ranging from 5 to 15 degrees and a radial secondary blade (16) with a radial secondary relief angle (b) ranging from 16 to 30 degrees; discharge grooves formed longitudinally between the cutter blades (20) to discharge chips produced in beveling; and a key groove formed at a portion inside the body, in which the helix angle (d) of the cutter blades (20) ranges from 5 to 45 degrees. With the beveling cutter of the present invention, it is possible to smoothly discharge chips produced in beveling and to prevent damage to the cutter blades (20).