Yamazaki Mazak Corporation

Yoshiya Katsu

Naoya Tanaka

Takamori Izaki

The present invention provides a tool holder interchangeably attached to a machine tool such as a combined machining lathe. A combined machining lathecomprises main spindlesandfor gripping a workpiece, and a machining main spindle headwhich rotates around a B axis. There are provided stockers Sand Sinside the lathe, and tool holdersandare respectively stored in the stockers Sand S. The tool holdercomprises a taper shank portionof a main shaft in a housingand four pull studs PSaround the taper shank portionof a main shaft, and is gripped by collet chucks of the machining main spindle head. Rotation of the taper shank portionof a main shaft is transmitted to a shaftvia a gear mechanism, to drive a drill toolto drill a deep hole.

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Aichi-pref., Japan

Yoshiya Katsu