A tool holding apparatus for interfacing a machine spindle receiver of a milling machine, which includes a holder nose connected to a holder body configured with a first divided section integrally connecting to a second divided section and a centralized axial bore for housing therewithin a tension bolt, a lock nut, and a thrust nut. The holder nose includes an axial bore incorporating a reverse-tapered configuration and three flat sectors to correspond with an equally configured shaft portion of a tool, whereupon the threaded attachment of the thrust nut to the holder nose furthers a locking arrangement of the tool within the axial bore to prevent inadvertent axial and rotational movement thereof during aggressive milling operations.

The invention relates to a screw-in tool (1) and to a tool holder (2) for such a screw-in tool. The screw-in tool (1) contains a tool head (3) and a tool shank (4) having an outer thread (5) and a supporting region arranged between the tool head (3) and the outer thread (5). According to the invention, the supporting region is formed by two conical bearing faces (6, 8) having different cone angles.

A tool receptacle for a screw-in tool having a main body, which has a receiving region including at least one conical contact surface for supporting a corresponding conical support surface of the screw-in tool. For thread-protection and for tightening with high concentricity and low production outlay, an insert is disposed in the main body, the insert is movable transversely with respect to the longitudinal axis of the main body and is rotationally-fixed with respect to the main body and has a mating thread for a thread on the screw-in tool.

A tool holder having a tool receptacle for chucking a tool shaft by frictional engagement, in which the tool receptacle comprises a plurality of annular clamping surfaces spaced apart from one another, which are intended for retaining the tool shaft by nonpositive engagement and are embodied on the inner circumference of a tube part, and the tube part has a recess in the material for varying its clamping action; the recess in the material is embodied by a plurality of annular channels extending in the circumferential direction, which are each separated from the tool receptacle by a resilient wall portion, which on its side facing away from the channel embodies the respective clamping surface.

A tool holder having a tool receptacle for chucking a tool shaft by frictional engagement, in which the tool receptacle comprises a plurality of annular clamping surfaces spaced apart from one another, which are intended for retaining the tool shaft by nonpositive engagement and are embodied on the inner circumference of a tube part, and the tube part has a recess in the material for varying its clamping action; the recess in the material is embodied by a plurality of annular channels extending in the circumferential direction, which are each separated from the tool receptacle by a resilient wall portion, which on its side facing away from the channel embodies the respective clamping surface.

A modular cutter head having a holder defining a threaded receiver. The cutter head can be screwed into the threaded receiver. The cutter can comprise an elongated body portion having a cutting end and cutting edge and an elongated coupling portion spaced from the cutting end, with the coupling portion comprising a core and a plurality of generally helically-extending start threads disposed circumferentially about the core. The cutter head may also include a cutting end having a chip flute and an insert seat.

An exchangeable tip cutting tool in which breakage of the threaded section and breakage of the thread ridges during installation of the machining head and under increased cutting load during cutting are limited and which is capable of performing machining with high efficiency; and a machining head and a holder to be used in the exchangeable tip cutting tool.

A tool holder includes a main body defining a body axis and comprising a witness hole extending perpendicular to the body axis; an extension within the main body along the body axis; and a locking mechanism configured to lock the extension along the body axis relative to the main body when the extension is visible through the witness hole. A length of the tool holder can be defined by moving the extension between various witness holes in the main body. The tool holder comprises a head configured to receive at least one tool.

A tool holder includes a main body defining a body axis and comprising a witness hole extending perpendicular to the body axis; an extension within the main body along the body axis; and a locking mechanism configured to lock the extension along the body axis relative to the main body when the extension is visible through the witness hole. A length of the tool holder can be defined by moving the extension between various witness holes in the main body. The tool holder comprises a head configured to receive at least one tool.

A cutter includes: a cutter main body rotated; and cutting edges disposed on an outer periphery of a front of the cutter main body, wherein a mounting hole penetrating through the cutter main body is formed, an opening portion opening in a front of the cutter main body, a housing portion provided on a rear of the opening portion to house a head portion of a headed bolt, and a female thread portion are formed in the mounting hole, a mounting part including a male thread portion in an outer periphery is mounted to the female thread portion, the male thread portion screwable to the female thread portion, and a through hole having a smaller inner diameter than the head portion is formed in the mounting part.