Patent ID: 6896453

Claim:
A cutting tool device for a machine tool comprising: a cutting tool adapted to produce a plane surface by movement parallel to the plane surface being produced, said cutting tool being fixed to a tip end of a rotating shaft and having cutting edges; and a suction cover covering and surrounding the cutting tool in an airtight manner, except for a tip face of the cutting tool, wherein a hood is attached to a forward end of the suction cover, around an opening of the suction cover, so as to extend farther forward from the suction cover to be displaceable within a limited range in a direction parallel to the direction in which the hood extends farther forward from the suction cover, wherein the hood has a tip face set apart from the cutting edges of the cutting tool by about 0.5 mm–3.0 mm when the hood is located at a forwardmost position in its limited range; and means for urging the hood forward, said urging means comprising springs positioned at fixed intervals from one another around the circumference of the opening of the suction cover.