A cutting tool includes a cutting-wheel handle with an uniform cross-section with an outer contour including points arranged following two opposed straight rows and points arranged following one or more curved line segment of the edge of a circle enclosing an area into which the opposed straight rows lie and a cutting wheel mounted on the cutting-wheel handle to rotate along a rotation plane parallel or substantially parallel to the two opposed straight rows. A cutting-wheel handle holder has a body including a through hole for the insertion therethrough of the cutting-wheel handle, to a cutting assembly including the cutting tool and the cutting-wheel handle holder, and to a ceramic cutting device including the cutting assembly pivotably mounted to a support movably mounted on longitudinal guides mounted to a base.

A holding sleeve has a sleeve body having multiple clamping slits, and an outlet portion. The clamping slits are defined longitudinally and radially in the outer surface, are arranged at even angular intervals and communicate with the knife hole. Each clamping slit has a first end and a lateral branch. The lateral branch extends laterally from the first end of the clamping slit and communicates with the clamping slit. The outlet portion is formed in the outer end of the sleeve body and communicates with the lateral branches of the clamping slits.

An adapter device for ceramic cutting machines (2) that includes an adapter plug (1) for the hole (8) of the tool holder (7) of a ceramic cutting machine (2. The plug (1) includes a hollow cylindrical shape with a stop (12) that performs an axial fixation in a direction of the plug (1) in the hole (8) of a tool holder (7) of the ceramic cutting machine (2); and a longitudinal slot (13) that leaves open the inner hollow space of the plug (1) along its entire length. The longitudinal slot (13) has a narrower segment in a part of the plug (1) that is nearest the end (21) having the stop (12), and a wider segment in the part of the plug (1) that is near the end (22) of the plug (1) opposite the stop (12).

A collet extends from a first to second end. A hoop section proximate the first end and has a continuous cylindrical interior surface that extends to an intermediate location between the first and second end. First and second legs each extend from the intermediate location. The first and second legs are spaced apart from each other. A holding section is located proximate the second end which has by a flange that extends radially inward from an exterior surface of the and terminates at a clamping surface.

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. Slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

In a clamping device (1) for the centred and repetitively accurate support of an object (2), in particular a workpiece to be machined on a machine tool, a tool or the like, the clamping device comprising: a chuck body (3) in which a receiving opening (4) is incorporated which has a longitudinal axis (5) as a centring reference for the object (2), a pulling element (6) which is mounted axially movably in the receiving opening (4), a collet chuck (7) which is inserted into the receiving opening (4) centred on the longitudinal axis (5) of the receiving opening (4) and which is driveably coupled to the pulling element (6), and a conical centring surface (8) which is worked onto the inner wall in the entrance area of the receiving opening (4),
it should be possible to insert a large number of objects (2) of different sizes into a receiving opening (4) of a chuck body (3) and locked in a centred position in this opening without the chuck bodies (3) or their receiving openings (4) having to be adapted to the differently sized collet chucks (7).

This is achieved in that an adapter sleeve (11) is provided, which is arranged between the receiving opening (4) of the chuck body (3) and the collet chuck (7) in the mounted condition, positionally oriented and centred on the conical centring surface (8), in that the outer contour of the adapter sleeve (11) is adapted to the inner contour of the receiving opening (4), in that the collet chuck (7) is mounted in the adapter sleeve (11) so as to be axially movable, and in that the inner contour of the adapter sleeve (11) has an inwardly inclined contact surface (12) which interacts with the outer contour of the collet chuck (7) in such a way that the inner diameter of the collet chuck (7) is reduced when the collet chuck (7) is drawn into the chuck body (3) by the pulling element (6), and the object (2) is thereby held centred and positionally oriented by the collet chuck (7).

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. Slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. The slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. The slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

A holding sleeve has a sleeve body having multiple clamping slits, and an outlet portion. The clamping slits are defined longitudinally and radially in the outer surface, are arranged at even angular intervals and communicate with the rotary cutting tool hole. Each clamping slit has a first end and a lateral branch. The lateral branch extends laterally from the first end of the clamping slit and communicates with the clamping slit. The outlet portion is formed in the outer end of the sleeve body and communicates with the lateral branches of the clamping slits.