DRILLING MACHINE

PROBLEM TO BE SOLVED: To provide a drilling machine which performs drilling to obtain a smooth machining surface, while imparting relative eccentric motion between a drill and a material to be machined, by combining inexpensive components. SOLUTION: This drilling machine performs drilling for a target material to be machined by transmitting rotary force of a driving motor 9 to a main spindle 23 and rotating the drill 7 mounted on the main spindle 23. The drilling machine has a base part relatively movable to a machining position in relation to the material to be machined. A rotation supporting body 22 rotatably supported on the base part is provided. The main spindle 23 is rotatably supported on the rotation supporting body 22. By driving driving motors 9 and 10, the rotation supporting body 22 and the main spindle 23 are rotated. An axial center β1of the rotation supporting body 22 and an axial center α1of the main spindle 23 are arranged to be separated from each other in parallel with a prescribed space. COPYRIGHT: (C)2007,JPO&INPIT