Patent ID: 7494307

Claim:
Tool adapter for releasable and interchangeable attachment to machine tools, having at least one rotating work spindle, for the accommodation and positioning of cutting tools, whereby the tool adapter ( 1 ), comprising a conical segment ( 4 ) and a cylindrical collar ( 3 ), is attached to a tool accommodation ( 2 ), and the tool accommodation ( 2 ) has a central bore ( 5 ) for coolant feed, wherein in the tool adapter ( 1 ), in a cylindrical collar ( 3 ) that follows the conical segment ( 4 ) on the tool side, crosswise bores ( 8 , 9 ) that lie diametrically opposite one another are provided, for accommodating tensioning bolts ( 10 , 11 ), and wherein the cylindrical collar ( 3 ) has a planar contact piece ( 7 ) that lies towards an accommodation region on the tool side and faces the tool accommodation ( 2 ).