TOOL DEVICE FOR BORING MACHINE

PROBLEM TO BE SOLVED: To provide a tool device for a boring machine, concurrently attaining size reduction and high torque processing in processing an inner wall surface in a relatively narrow space. SOLUTION: The tool device for the boring machine has a tool 25 for processing an inner wall surface 91a of a space 91 formed inside an object to be processed. Besides, the tool device 2 for the boring machine 1 is provided with a driving transmission mechanism 21 of setting a tool rotational axis 251 of the tool 25 in a different direction from the longitudinal direction of a non-rotation support portion 3 having a main spindle 4a of the boring machine 2 or a main rotational axis 32 therein, and angle converting a driving force on the main spindle 4a or the non-rotation supporting portion 3 side into a rotational force of the tool 25. The driving transmission mechanism 21 is a gear mechanism which has at least three gears 22, 231, 232, 233 being arranged in the longitudinal direction and adjacent to engage with each other, and is provided with a tool on at least any of the gears and with a gear mechanism 21a for attaching the tool on the axis of the gear 231. COPYRIGHT: (C)2010,JPO&INPIT