Certain exemplary embodiments can provide a system comprising a machine tool, a centerable holder, and a drill. The machine tool comprises a spindle and a tool holder. The centerable holder is pointed at the spindle of the machine tool. The centerable holder defining a pair of horizontal adjusters and a pair of vertical adjusters.

Certain exemplary embodiments can provide a system comprising a machine tool, a centerable holder, and a drill. The machine tool comprises a spindle and a tool holder. The centerable holder is pointed at the spindle of the machine tool. The centerable holder defining a pair of horizontal adjusters and a pair of vertical adjusters.

A tool holder having a main body for coupling the tool holder to the spindle of a machine tool and having a clamping surface connected thereto for clamping a tool, characterized in that the tool holder has at least one portion shaped in one piece by primary shaping, which in its interior has one or more cavities that form an enclave in the portion shaped by primary shaping.

A tool holder having a main body for coupling the tool holder to the spindle of a machine tool and having a clamping surface connected thereto for clamping a tool, characterized in that the tool holder has at least one portion shaped in one piece by primary shaping, which in its interior has one or more cavities that form an enclave in the portion shaped by primary shaping.

The invention relates to a tool part adapted to be connected to a tool counterpart, wherein the tool part comprises a centering portion and an axial stop, and wherein the tool part comprises a plug-rotation portion adapted to cooperate with a plug-rotation counterpart portion of the tool counterpart to connect the tool part to the tool counterpart.

A cutter holder has a body and a damping assembly. The damping assembly is contained inside the body. The damping assembly has a central damping pole and six auxiliary damping poles. The six auxiliary damping poles are arranged around the central damping pole. The body has a specific weight. The central damping pole has a specific weight larger than the specific weight of the body. Each one of the six auxiliary damping poles has a specific weight larger than the specific weight of the body. The damping assembly is utilized to reduce vibrations caused by machining.

A female screw portion 24 is formed over the entire length of a through hole 23 passing through an axis of an ultrasonic horn 13, first and second male screw portions 25, 26 formed on the ultrasonic horn 13 side of axes of first and second boosters 14, 15 are screwed into the female screw portion 24, the ultrasonic horn 13 and the first and second boosters 14, 15 are fastened coaxially, leading ends 27, 28 of the first and second male screw portions 25, 26 are not in contact with each other inside the through hole 23, and a cutting blade 12 is attached to an outer periphery of a base portion 20 of the ultrasonic horn 13 having a space portion 29 surrounded by an inner wall of the through hole 23 and the leading ends 27, 28 of the first and second male screw portions 25, 26.

A female screw portion 24 is formed over the entire length of a through hole 23 passing through an axis of an ultrasonic horn 13, first and second male screw portions 25, 26 formed on the ultrasonic horn 13 side of axes of first and second boosters 14, 15 are screwed into the female screw portion 24, the ultrasonic horn 13 and the first and second boosters 14, 15 are fastened coaxially, leading ends 27, 28 of the first and second male screw portions 25, 26 are not in contact with each other inside the through hole 23, and a cutting blade 12 is attached to an outer periphery of a base portion 20 of the ultrasonic horn 13 having a space portion 29 surrounded by an inner wall of the through hole 23 and the leading ends 27, 28 of the first and second male screw portions 25, 26.

A coupling element for receiving a probe tip in a probe measuring apparatus has a journal at one end with a first connecting/coupling region. A screw insert has a first connecting/coupling region at one end with a recess, in particular for connecting to the coupling element 16. The journal of the coupling element forms, on an outer surface, or the recess of the screw insert forms, on an inner surface, multiple thread segments or respectively which do not adjoin one another in a radial circumferential direction. A probe measuring apparatus includes the coupling element, the screw insert, a coupling arm/measuring shaft, and a probe insert connected to the coupling arm by way of the coupling element and the screw insert.

A female screw portion 24 is formed over the entire length of a through hole 23 passing through an axis of an ultrasonic horn 13, first and second male screw portions 25, 26 formed on the ultrasonic horn 13 side of axes of first and second boosters 14, 15 are screwed into the female screw portion 24, the ultrasonic horn 13 and the first and second boosters 14, 15 are fastened coaxially, leading ends 27, 28 of the first and second male screw portions 25, 26 are not in contact with each other inside the through hole 23, and a cutting blade 12 is attached to an outer periphery of a base portion 20 of the ultrasonic horn 13 having a space portion 29 surrounded by an inner wall of the through hole 23 and the leading ends 27, 28 of the first and second male screw portions 25, 26.