Patent ID: 8920081

Claim:
In combination a receptacle having a body ( 2 ) and a tool- or workpiece holder insert connectable with the receptacle body, wherein (a) the receptacle body has, (i) a cylindrical receiving bore ( 4 ) having a bore axis ( 5 ), (ii) a finely machined, dimensionally accurate first plane surface ( 6 ) extending at a right angle with respect to the bore axis ( 5 ) and at least partially surrounding the bore axis ( 5 ), and (iii) a first cone surface ( 9 ) coaxial with the bore axis ( 5 ) and having a tapered end facing toward said first plane surface ( 6 ), wherein said first cone surface ( 9 ) is located on an inner wall of said receiving bore ( 4 ) and is configured so as to be interrupted by channel-like or groove-like recesses ( 10 ) that are extending parallel to the bore axis ( 4 ) and forming a gear-like inner profile, the insert ( 3 ) has (iv) a collet pin ( 15 ) having an axis and configured to be inserted into said receiving bore ( 4 ), (v) a finely machined, dimensionally accurate second plane surface ( 17 ) extending at right angle with respect to the collet pin axis ( 16 ) and at least partially surrounding the collet pin axis ( 16 ), and (vi) a profile part coaxial with the collet pin axis and having a greater diameter than the collet pin, wherein said profile part is arranged in an axial distance from said second plane surface ( 17 ) and provided with a second cone surface ( 22 ) having a tapered end facing toward said second plane surface, and wherein said second cone surface is configured so as to be interrupted by channel- or groove-like recesses ( 24 ) that are extending parallel to the collet pin axis and forming a gear outer profile that is complementary to said gear-like inner profile of said receiving bore ( 4 ), and (c) with the collet pin inserted in the receiving bore the two plane surfaces ( 6 , 17 ) are superimposed, and the two cone surfaces ( 9 , 22 ) of the inner and of the outer profile, respectively, can be clamped against each other by rotating the collet pin relative to the receiving bore from an unclamped position in which the two gear-like profiles are not overlapping into a clamped position in which the two gear-like profiles are overlapping and in which the two superimposed plane surfaces are biased against each other.