A parting-off tool assembly including a blade holder, a parting-blade mounted to, and clamped by, the blade holder, a cutting insert and a coolant conduit mounted to the parting-blade. The cutting insert defining a cutting-edge width CW and an extended-width cutting plane of the same width. The coolant conduit with an outlet opening out to a first extension portion located within the extended-width cutting plane.

In a cutting tool having an indexable lay-down cutting insert with a central body portion and three circumferentially spaced apart cutting portions, the cutting insert is removably secured to an elongated holding portion of an insert holder. Each cutting portion has a cutting edge with first and second cutting end points, the cutting edge formed at the intersection of an upward facing rake surface and a radially outward facing relief surface. In a top view of the cutting insert, parallel imaginary first and second vertical planes containing the first and second cutting end points, intersect the central body portion at first and second body side points, which are located first and second cutting distances from the first and second cutting end points, respectively. Each of the first and second cutting distances is greater than twenty-five percent of the first radius of an imaginary first circle circumscribing the cutting insert.

In a cutting tool having an indexable lay-down cutting insert with a central body portion and three circumferentially spaced apart cutting portions, the cutting insert is removably secured to an elongated holding portion of an insert holder. Each cutting portion has a cutting edge with first and second cutting end points, the cutting edge formed at the intersection of an upward facing rake surface and a radially outward facing relief surface. In a top view of the cutting insert, parallel imaginary first and second vertical planes containing the first and second cutting end points, intersect the central body portion at first and second body side points, which are located first and second cutting distances from the first and second cutting end points, respectively. Each of the first and second cutting distances is greater than twenty-five percent of the first radius of an imaginary first circle circumscribing the cutting insert.

A tool holder includes a tool shank and a tool head connected to the tool shank. The tool head has a rear surface. An insert seat or a blade pocket is partially formed on both the tool head and the tool shank, and extends rearwardly of the tool head's rear surface. Adjacent to at least a portion of a shank side surface there is a reinforcement portion connecting the shank side surface and the tool head.

A tool holder includes a tool shank and a tool head connected to the tool shank. The tool head has a rear surface. An insert seat or a blade pocket is partially formed on both the tool head and the tool shank, and extends rearwardly of the tool head's rear surface. Adjacent to at least a portion of a shank side surface there is a reinforcement portion connecting the shank side surface and the tool head.

Tool for machining a workpiece, comprising: a holder having a first internal coolant duct; a cutting insert having a main cutting edge; a first fastening element for releasably fastening the cutting insert to the holder; a plate-like coolant guiding attachment having a second internal coolant duct; and a second fastening element for releasably fastening the coolant guiding attachment to the holder. In the assembled state of the tool, the first internal coolant duct is fluidically connected to the second internal coolant duct and the coolant guiding attachment covers at least a part of the cutting insert. The coolant guiding attachment comprises a first opening, which is configured as a recess or through-opening and allows access to the first fastening element, such that the cutting insert is separately releasable from the holder by releasing the first fastening element even when the coolant guiding attachment is fastened to the holder, and the coolant guiding attachment is separately releasable from the holder by releasing the second fastening element even when the cutting insert is fastened to the holder.

Tool for machining a workpiece, comprising: a holder having a first internal coolant duct; a cutting insert having a main cutting edge; a first fastening element for releasably fastening the cutting insert to the holder; a plate-like coolant guiding attachment having a second internal coolant duct; and a second fastening element for releasably fastening the coolant guiding attachment to the holder. In the assembled state of the tool, the first internal coolant duct is fluidically connected to the second internal coolant duct and the coolant guiding attachment covers at least a part of the cutting insert. The coolant guiding attachment comprises a first opening, which is configured as a recess or through-opening and allows access to the first fastening element, such that the cutting insert is separately releasable from the holder by releasing the first fastening element even when the coolant guiding attachment is fastened to the holder, and the coolant guiding attachment is separately releasable from the holder by releasing the second fastening element even when the cutting insert is fastened to the holder.

The present invention relates, according to a first aspect, to a cutting tool (100, 200, 300, 400, 500) for machining mechanical parts, comprising a tool body (102) with a central axis (A) and a gripping diameter (D102), a tool head (103) adjacent to the tool body (102) in the direction of the central axis (A) and composed of a sprinkling region (104) and a cutting portion (105) having a cutting diameter (D105) which is smaller than the gripping diameter (D102), the cutting tool (100) also comprising at least one lubrication duct (C102) which extends through the tool body (102) and which opens into a sprinkling hole (S104) located in the sprinkling region (104), characterized in that the cutting tool (100, 200, 300, 400, 500) comprises a directional sprinkling ring (106) that is provided for attachment to a ring connection region (102b) of the tool body (102), the ring connection region (102b) being adjacent to the sprinkling region (104) and in that the directional sprinkling ring (106) is configured in such a way that it delimits, with at least one portion of the sprinkling region (104), a distribution space (107), and in that the cross section of the distribution space (107) is reduced in the direction of the cutting portion (105). The present invention relates, according to a second aspect, to a cutting tool (600, 700, 800) for machining mechanical parts, comprising a tool body (601) with a central axis (A) and a gripping diameter (D601), a tool head (602) adjacent to the tool body (601) in the direction of the central axis (A) and composed of an intermediate zone (603) and of a cutting portion (604) having a cutting diameter (D604) which is smaller than the gripping diameter (D601), the intermediate zone (603) being positioned between the tool body (601) and the cutting portion (604) and having an essentially truncated cone shape, characterized in that the cutting tool (600, 700, 800) comprises at least a first lubrication duct (C601a) and a second lubrication duct (C601b) which extend through the tool body (601), the first lubrication duct (C601a) opening into a first sprinkling hole (S604a) and the second lubrication duct (C601b) opening into a second sprinkling hole (S604b), the first sprinkling hole (S604a) and the second sprinkling hole (S604b) being loca

The present invention relates, according to a first aspect, to a cutting tool (100, 200, 300, 400, 500) for machining mechanical parts, comprising a tool body (102) with a central axis (A) and a gripping diameter (D102), a tool head (103) adjacent to the tool body (102) in the direction of the central axis (A) and composed of a sprinkling region (104) and a cutting portion (105) having a cutting diameter (D105) which is smaller than the gripping diameter (D102), the cutting tool (100) also comprising at least one lubrication duct (C102) which extends through the tool body (102) and which opens into a sprinkling hole (S104) located in the sprinkling region (104), characterized in that the cutting tool (100, 200, 300, 400, 500) comprises a directional sprinkling ring (106) that is provided for attachment to a ring connection region (102b) of the tool body (102), the ring connection region (102b) being adjacent to the sprinkling region (104) and in that the directional sprinkling ring (106) is configured in such a way that it delimits, with at least one portion of the sprinkling region (104), a distribution space (107), and in that the cross section of the distribution space (107) is reduced in the direction of the cutting portion (105). The present invention relates, according to a second aspect, to a cutting tool (600, 700, 800) for machining mechanical parts, comprising a tool body (601) with a central axis (A) and a gripping diameter (D601), a tool head (602) adjacent to the tool body (601) in the direction of the central axis (A) and composed of an intermediate zone (603) and of a cutting portion (604) having a cutting diameter (D604) which is smaller than the gripping diameter (D601), the intermediate zone (603) being positioned between the tool body (601) and the cutting portion (604) and having an essentially truncated cone shape, characterized in that the cutting tool (600, 700, 800) comprises at least a first lubrication duct (C601a) and a second lubrication duct (C601b) which extend through the tool body (601), the first lubrication duct (C601a) opening into a first sprinkling hole (S604a) and the second lubrication duct (C601b) opening into a second sprinkling hole (S604b), the first sprinkling hole (S604a) and the second sprinkling hole (S604b) being loca

A cutting tool, comprising a substrate having a cutting surface and a coating adhered to the cutting surface in a solid state, wherein the coating includes a soft metal and is capable of melting and functioning as an in-situ liquid lubricant when the cutting tool is applied in a machining operation. Also, a method of applying a coating to a cutting tool, comprising receiving a premachining workpiece, the premachining workpiece formed of a coating material including a soft metal; and machining the premachining workpiece with the cutting tool such that a layer of the coating material adheres to a cutting surface of the cutting tool in a solid state.