Tool holder arrangement for firmly connecting a
tool holder to a tool, comprising: - a
tool holder (10) comprising two opposite ends, a clamping groove (11), a conical hole (12), and a screw hole (13), wherein the clamping groove (11) is arranged inside the
tool holder (10) and has a lower side (111), wherein the conical hole (12) extends from one end of the tool holder (10) to the clamping groove (11) and thus communicates with the clamping groove (11), wherein the hole
diameter of the conical hole (12) decreases successively towards the clamping groove (11), wherein the screw hole (13) extends from the lower side (111) of the clamping groove (11) to the other end of the tool holder (10) and is provided with an internal thread (141); and - a tool (20) comprising a connecting part (21), an extension shaft (22), a fastening bore (23) and at least one
machining element (27), wherein the connecting part (21) is conical and comprises a supporting end (211) and an
insertion end (212), wherein the supporting end (211) and the
insertion end (212) are arranged opposite one another, wherein the
insertion end (212) is inserted into the conical hole (12), wherein the outer
diameter of the connecting part (21) decreases successively from the supporting end (211) to the insertion end (212), wherein the fastening bore (23) extends from the insertion end (212) to the supporting end (211) and is polygonally profiled, wherein the extension shaft (22) protrudes from the supporting end (211) and a
machining end facing away from the connecting part (21) (221), wherein the at least one
processing element (27) is mounted on the
processing end (221); - a fastening element (30) located inside the tool holder (10) and comprising a clamping piece (31) and an insert (33), the clamping piece (31) matching the profile of the clamping groove (11), the clamping piece (31) being block-shaped and having a first surface (311) and a second surface (312), the first and second surfaces (311, 312) facing opposite one another, the outer
diameter of the clamping piece (31) being smaller than the diameter of the conical hole (12), the second surface (312) abutting the lower side (111) of the clamping groove (11), the insert (33) being arranged on the first surface (311) of the clamping piece (31) and having a polygonal cross-section, the insert (33) being inserted into the fastening bore (23) and being in positive connection therewith; - a threaded bolt (50) which is pushed through the fastening element (30) and thus screwed into the screw hole (13), wherein the fastening element (30) and the tool holder (10) are connected to one another by means of the threaded bolt (50); and - a closure cap (40) which is connected to the tool holder (10), is supported on the support end (211) and has a through-opening, wherein the extension shaft (22) and the
machining element (30) protrude from the through-opening.