A blade portion for a grooving tool includes opposite first and second surfaces, a blade width thereof being defined as a shortest distance between the first and second surfaces, opposite third and fourth surfaces, and a fifth surface and an opposite blade portion end. The blade width is constant or substantially constant from the fifth surface up to the blade portion end. An insert seat separating the third surface and the fifth surface is arranged to receive an insert having a main cutting edge, an associated rake face, and an associated main clearance surface. The main cutting edge defines an insert width being greater than the blade width. A shortest distance from the fifth surface to the opposite blade portion end is greater than a shortest distance from the third surface to the fourth surface.

A machining head for the mechanical, in particular cutting, machining, in particular for the actuation, of a workpiece, having: a housing, a housing-side coupling region for coupling a machining tool to be coupled to the machining head, wherein the housing-side coupling region comprises at least one coupling interface for directly coupling a machining tool to be coupled to the machining head.

A machining head for the mechanical, in particular cutting, machining, in particular for the actuation, of a workpiece, having: a housing, a housing-side coupling region for coupling a machining tool to be coupled to the machining head, wherein the housing-side coupling region comprises at least one coupling interface for directly coupling a machining tool to be coupled to the machining head.

An axle boring assembly includes a portable power head or drive unit, a bearing pack to which the drive unit is attached, an adjusting base to which the bearing pack is adjustably secured and a mounting assembly which fits over a motor vehicle axle and to which the adjusting base is secured. The mounting assembly comprises a first section having axially spaced apart front and rear clamps and a substantially identical second section with matching spaced apart front and rear clamps. Threaded fasteners extend between the front and rear clamps and may be rotated to secure the mounting assembly about the end of the axle. Each clamp includes jaws which contact the axle and which may be selected from sets of various sizes and configurations to ensure accurate and suitable engagement of the axle.

An axle boring assembly includes a portable power head or drive unit, a bearing pack to which the drive unit is attached, an adjusting base to which the bearing pack is adjustably secured and a mounting assembly which fits over a motor vehicle axle and to which the adjusting base is secured. The mounting assembly comprises a first section having axially spaced apart front and rear clamps and a substantially identical second section with matching spaced apart front and rear clamps. Threaded fasteners extend between the front and rear clamps and may be rotated to secure the mounting assembly about the end of the axle. Each clamp includes jaws which contact the axle and which may be selected from sets of various sizes and configurations to ensure accurate and suitable engagement of the axle.

Provided is a mobile machining system for a turning machining of inner surfaces of hollow-cylindrical components, in particular for machining valve seats. The machining system includes a second drive train and the third drive train in each case which preferably have a gear mechanism, in particular a planetary gear mechanism, which is arranged between the respective motor and the associated gearwheel which projects outward from the rotational part. This leads to a simple, inexpensive and space-saving construction.

Provided is a mobile machining system for a turning machining of inner surfaces of hollow-cylindrical components, in particular for machining valve seats. The machining system includes a second drive train and the third drive train in each case which preferably have a gear mechanism, in particular a planetary gear mechanism, which is arranged between the respective motor and the associated gearwheel which projects outward from the rotational part. This leads to a simple, inexpensive and space-saving construction.

An elongated tool holder includes a tool anti-vibration component having a component housing portion and an anti-vibration arrangement. The anti-vibration arrangement includes an enclosed interior component cavity formed in the component housing portion. The anti-vibration arrangement also includes a vibration absorber portion disposed within the component cavity that is integrally formed with the component housing portion to have unitary one-piece construction therewith. The vibration absorber portion includes a vibration absorbing mass and at least one elastic suspension member through which the vibration absorbing mass is connected to the component housing portion. The component cavity includes an oscillating space located between an inner surface of the component housing portion and the vibration absorber portion. The vibration absorbing mass is configured to oscillate within the oscillating space upon elastic deformation of the at least one suspension member. A cutting tool is provided with the tool holder.

A cutting insert may include a base member and a coating layer. The base member may include a first and second surface. The coating layer may be located on the base member. The coating layer may include a first layer containing -aluminum oxide, which is located above the first surface and the second surface. The first layer may include a first region located above the first surface, and a second region located above the second surface. When an angle formed by a normal line of a crystal plane (001) of the -aluminum oxide in the first layer and a normal line of the surface of the base member is a first inclination angle, a peak of a distribution of the first inclination angle in the first region is located at a lower angle side than a peak of a distribution of the first inclination angle in the second region.

A cutting insert may include a base member and a coating layer. The base member may include a first and second surface. The coating layer may be located on the base member. The coating layer may include a first layer containing -aluminum oxide, which is located above the first surface and the second surface. The first layer may include a first region located above the first surface, and a second region located above the second surface. When an angle formed by a normal line of a crystal plane (001) of the -aluminum oxide in the first layer and a normal line of the surface of the base member is a first inclination angle, a peak of a distribution of the first inclination angle in the first region is located at a lower angle side than a peak of a distribution of the first inclination angle in the second region.