Patent ID: 8628281

Claim:
An exchangeable cutting head to be attached removably to a tool body by being inserted into a mounting hole formed in the tool body and screwed on a mounting screw section provided on a bottom portion of the mounting hole, the exchangeable cutting head comprising: a cutting head body comprising: a cutting portion provided at a front-end section; a mounting portion provided at a rear-end section and inserted into the mounting hole; and an engaging hole having an inner-peripheral face on which an uneven face is formed, the cutting head body being made of a hard material; and a connection member comprising: a shaft portion that is inserted into the engaging hole, includes an outer periphery attached firmly to the inner-peripheral face of the engaging hole, and is engaged with the inner-peripheral face; a head screw section screwed with the mounting screw section; and a hole section formed inside of the head screw section and the shaft portion and along a center line of the shaft portion, the connection member being made of a plastically-deformable metal material having a degree of hardness lower than a degree of hardness of the hard material and the connection member being connected to the cutting head body; wherein at least part of the outer periphery of the shaft portion is plastically-deformed along the uneven face.