Yukiwa Seiko Kabushiki Kaisha

Koichi Takizawa

Akira Sakamaki

Kazuo Sakamaki

Tomokazu Seki

To provide a tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application. A tool holder comprising a vibration-minimizing part for minimizing vibration generated in a tool () when the tool () is used to perform machining, the vibration-minimizing part being provided, on a distal-end side, with tool-holding means for detachably securing the tool () and provided, on a proximal-end side, with a shank part () to be mounted on a spindle of a machine tool; wherein a plurality of reinforcing parts () extending in an axial direction of the tool holder () are provided to a peripheral section of the tool holder () in a radial direction; accommodating recesses () for accommodating a vibration-damping material () are provided between the reinforcing parts (); the vibration-damping material () is accommodated in the accommodating recesses (); and the vibration-damping material () and the reinforcing parts () form the vibration-minimizing part.

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Ojiya, Japan

Koichi Takizawa