Patent ID: 7666070

Claim:
A tool holder for a disc-shaped working tool ( 18 ), comprising: a working tool holding member ( 14 ) having a central opening ( 30 ); a working tool holding counter-member ( 16 ) rotatable, together with the working tool holding member ( 14 ), about an operational axis (A) and cooperating with the working tool holding member ( 14 ) for receiving therebetween the working tool ( 18 ) for joint rotation therewith; central securing means ( 26 ) extendable through the central opening ( 30 ) of the working tool holding member ( 14 ) for securing the working tool ( 18 ) between the working tool holding member ( 14 ) and the working tool holding counter-member ( 16 ); and at least three coupling elements ( 44 ) associated with the working tool holding member ( 14 ), radially spaceable from the central securing means ( 26 ) and having a rotary stop for forming a releaseable plug-in connection with at least three through-bores ( 24 ) formed in the working tool ( 18 ); wherein each of the at least three coupling elements ( 44 ) comprises, at a respective free end thereof, a shaped member ( 38 ) having a first conical section that tapers away in a direction away from the working tool holding member ( 14 ); and wherein each of the at least three through-bores ( 24 ) comprises a shaped body with a second conical section correlated to a respective shaped member ( 38 ) for formlockingly cooperating with a respective one of the at least three coupling elements ( 44 ).