The composite cutting tool of the present invention has a shank portion made of stainless steel or carbon steel and a head portion made of tungsten steel, both ends of which are formed of a clamping shank and a body, the outer diameter of the body is smaller than the clamping shank, The head portion is formed with a through hole at the center of both end faces. The head portion is coupled to the end face of the main body through one end face, and the inner peripheral face of the through hole is coupled to the outer peripheral face of the protruding post of the main body. This makes it possible to prevent the body made of stainless steel or carbon steel from easily rupturing during tapping or milling and at the same time to increase the bonding strength between the shank portion and the head portion engaging portion.
展开▼
