Tool device

A series of at least two tool devices,

• wherein each of the at least two tool devices is suitable for use with a machine tool which has a driving device moving around a driving axis,
• wherein each of the at least two tool devices has an attachment device by which each of the at least two tool devices can be fastened to a machine tool in such a manner that the driving axis and a respective tool axis of rotation are substantially coincident,
• wherein the attachment device of each of the at least two tool devices, for receiving a driving force, comprises at least two driving area regions each having a plurality of surface points and which are spaced from the respective tool axis of rotation,
• wherein tangent planes are inclined on the surface points with respect to a respective axial plane, which includes the respective tool axis of rotation,
• wherein the tangent planes are inclined with respect to a respective radial plane, which extends perpendicularly to the respective tool axis of rotation,
• wherein the attachment device of each of the at least two tool devices comprises a respective cover area portion,
• wherein the cover area portion of a respective one of the at least two tool devices is directly or indirectly connected to at least one of the driving area regions of the respective one of the at least two tool devices,
• wherein the cover area portion of the respective one of the at least two tool devices extends from the respective driving area regions in a radial direction towards the respective tool axis of rotation,
• wherein each of the at least two tool devices of the series has a respective reference plane,
• wherein the respective reference plane is arranged perpendicular to the respective tool axis of rotation, wherein the respective reference plane has a respective reference diameter of the respective driving area regions, and
• wherein, for several tool devices of a series, a distance (Δ) between a first surface of said cover area portion and the reference plane is between a first lower limit and a second upper limit, wherein the first lower limit is larger than 0.01 mm and the second upper limit is smaller than 0.5 mm, and/or
• wherein the distance (Δ) is substantially constant for different tool devices of the series, and/or
• wherein several types of the tool devices of the series have different wall thicknesses (t).

A tool device, which is suitable for use with a machine tool which has a driving device moving around a driving axis,

• and which has an attachment device by which it is fastened to a machine tool in such a manner that the driving axis and a tool axis of rotation are substantially coincident,
• wherein the attachment device, for receiving a driving force, comprises at least two driving area regions each having a plurality of surface points and which are spaced from this tool axis of rotation,
• wherein tangent planes are inclined on the surface points with respect to an axial plane, which includes the tool axis of rotation,
• wherein the tangent planes are inclined with respect to a radial plane, which extends perpendicularly to the tool axis of rotation,
• wherein the attachment device comprises a cover area portion,
• wherein this cover area portion is directly or indirectly connected to at least one of these driving area regions,
• wherein the cover area portion extends from the driving area regions in a radial direction towards the tool axis of rotation, wherein the tool device has a wall thickness of substantially (t),
• wherein at least a first upper boundary plane and a second lower boundary plane are spaced apart from each other by a distance (T),
• wherein the boundary planes are disposed substantially perpendicular to said tool axis of rotation,
• wherein the at least one first upper boundary plane and the at least one second lower boundary plane are spaced from each other,
• wherein each of the driving area regions is arranged between the at least one first upper boundary plane and the at least one second lower boundary plane, and
• wherein the distance (T) is greater than 2 times (t).

A tool device, which is suitable for use with a machine tool which has a driving device moving around a driving axis,

• and which has an attachment device by which it is fastened to a machine tool in such a manner that the driving axis and a tool axis of rotation are substantially coincident,
• wherein the attachment device, for receiving a driving force, comprises at least two driving area regions each having a plurality of surface points and which are spaced from this tool axis of rotation,
• wherein tangent planes are inclined on the surface points with respect to an axial plane, which includes the tool axis of rotation,
• wherein the tangent planes are inclined with respect to a radial plane, which extends perpendicularly to the tool axis of rotation,
• wherein the attachment device comprises a cover area portion,
• wherein this cover area portion is directly or indirectly connected to at least one of these driving area regions,
• wherein the cover area portion extends from the driving area regions in a radial direction towards the tool axis of rotation,
• wherein the attachment device comprises a side wall, wherein the side wall comprises the at least two driving area regions, and wherein a substantially hollow conical recess is formed by the side wall, the substantially hollow conical recess having a cross section with a variable spacing of the side wall from the tool axis of rotation in a plane orthogonal to the tool axis of rotation.