Patent ID: 7717653

Claim:
A processing tool comprising: a shank attached detachably to the main spindle of a machine tool; a case mounted to the outer portion of the bottom portion of said shank through a bearing; a positional engaging portion which is provided in said case and engages a fixed portion of the machine tool so as to position said case in a static state when mounted to said main spindle; an absorption rod which is situated slidably in the axial direction in an axial hole provided in the axial direction of the bottom end of said shank; an absorption spring installed between said absorption rod and said shank with said absorption rod urged in the axial direction; a tiltable case situated relative to the axial direction on the bottom within said case; a holder situated rotatably through a bearing within said tiltable case; a slidable holder which is situated in the axial direction within said holder and provided with a chuck portion for a tool at a leading end thereof; a spring installed between said holder and said slidable holder with said slidable holder urged in the axial direction; a universal joint which connects a bottom end portion of said absorption rod with a top end portion of said holder such that it is capable of being tilted freely so as to transmit a rotation; a tilt supporting pin unit which is situated within said case located around the outer peripheral portion of said universal joint and includes a plurality of tilt supporting pins projecting downward with the respective tilt supporting pins urged downwards by said springs; and a pressure receiving plate which is provided above said tilting case and allows the tips of each tilt supporting pin of said tilt supporting pin unit to make contact therewith.