Sumitomo Electric Hardmetal Corp.

Kazuhiko Kashima

Kouki Matsubara

Junya Okida

Yoshikatsu Mori

Daisuke Murakami

Masaaki Jindai

Norihide Kimura

Masanobu Ueda

Ryusei Hamada

Yasuhiro Kajiwara

The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90&#xb0;.

Cutting tool

An object is to provide a vibration suppressing cutting tool which is inexpensive and can damp chattering extremely effectively, and which is simple in structure and is applicable to a wide variety of machining diameters and cutting conditions. The shankof the holderis formed with a pocket. In the pocket, a vibration suppressing pieceis received so as to be movable relative to the holderand not protrudable from the pocket. Under kinetic energy from the holder during cutting, the vibration suppressing piecealternately knocks against a pair of opposed inner wall surfacesandof the pocket along its surface, along a plurality of lines or on a plurality of points when the holder vibrates during cutting, thereby damping vibrations of the holder.

Vibration suppressing cutting tool

Growing community of inventors

Itami, Japan

Kazuhiko Kashima