Patent ID: 8690500

Claim:
A tool interface ( 5 ) for coupling a tool head ( 2 ) to a tool shank ( 3 ) in a centered manner in respect of a shank axis ( 4 ), comprising: a first interface part ( 6 ) that is configured to be connected to the tool shank ( 3 ) or to the tool head ( 2 ); and a second interface part ( 7 ) that is configured to be connected to the respective other tool part, namely, to the tool head ( 2 ) or to the tool shank ( 3 ), the two interface parts ( 6 , 7 ) having interface surfaces ( 9 , 10 ) that substantially complement each other and are intended to bear flatly on each other, the interface surface ( 9 ) of the first interface part ( 6 ) comprising an inner cone surface ( 21 ) and an outer cone surface ( 22 ), which surrounds the latter on the outside and coaxially, and the interface surface ( 9 ) of the second interface part ( 7 ) comprising an outer cone surface ( 27 ), which corresponds with the inner cone surface ( 21 ) of the first interface part ( 6 ), and an inner cone surface ( 28 ), which corresponds with the outer cone surface ( 22 ) of the first interface part ( 6 ), wherein an annular web ( 23 ) formed between the inner cone surface ( 21 ) and the outer cone surface ( 22 ) of the first interface part ( 6 ) is slotted by at least one recess ( 24 ), wherein the inner cone surface ( 21 ) of the first interface part ( 6 ) has an extent, in the direction of the shank axis ( 4 ), that exceeds the corresponding extent of the outer cone surface ( 22 ) of the first interface part ( 6 ) by at least a factor 4, and wherein, when the first interface part ( 6 ) is joined to the second interface part ( 7 ), the annular web ( 23 ) of the first interface part ( 6 ) is acted upon in a radially inward direction by the second interface part ( 7 ) thereby locking the annular web ( 23 ) of the first interface part ( 6 ) between the inner cone surface ( 28 ) and the outer cone surface ( 27 ) of the second interface part ( 6 ).