A cutting tool holder (110) configured for mounting thereon a cutting insert (140). The cutting tool holder comprises a body (112) formed with an insert seat (120) configured receiving therein the cutting insert and a seat bore (135) configured for accommodating therein a fastening member (150). The cutting tool holder also comprises an anchoring element (170) received within the body of the holder, the fastening element being configured for secured engagement with the anchoring element and being free of such engagement with the seat bore.

A cutter assembly for a boring bar may include a cutter body, a cutter-element carrier, and an adjustment assembly having an adjustment element. The cutter-element carrier may be configured to be slidingly received in a channel in the cutter-body. The cutter-element carrier may have a first surface transverse to the first line. The adjustment element may have a second surface defining a position of the cutter-element carrier in the channel when the second surface is in contact with the first surface. The adjustment element may be movable along a second line transverse to the first surface for adjusting the position of the cutter-element carrier in the channel. The cutter body may include first and second recess portions. First and second insert portions may be inserted into the first and second recess portions, respectively, and may define float travel-limits for the cutter body.

According to the present disclosure, a cutting insert includes an upper surface having a polygonal shape and includes a corner, a side surface adjacent to the upper surface, a cutting edge and a protrusion. The cutting edge is located at a ridge part in which the upper surface intersects with the side surface and includes a corner part located at the corner. The protrusion is located on the upper surface. The protrusion includes a first protrusion on a bisector of the corner in a top view. The protrusion further includes a second protrusion adjacent to the first protrusion in a direction orthogonal to the bisector. The second protrusion is closer to the corner than the first protrusion in the top view.

A cutter assembly for a boring bar may include a cutter body, a cutter-element carrier, and an adjustment assembly having an adjustment element. The cutter-element carrier may be configured to be slidingly received in a channel in the cutter-body. The cutter-element carrier may have a first surface transverse to the first line. The adjustment element may have a second surface defining a position of the cutter-element carrier in the channel when the second surface is in contact with the first surface. The adjustment element may be movable along a second line transverse to the first surface for adjusting the position of the cutter-element carrier in the channel. The cutter body may include first and second recess portions. First and second insert portions may be inserted into the first and second recess portions, respectively, and may define float travel-limits for the cutter body.

A cutting tool holder (110) configured for mounting thereon a cutting insert (140). The cutting tool holder comprises a body (112) formed with an insert seat (120) configured receiving therein the cutting insert and a seat bore (135) configured for accommodating therein a fastening member (150). The cutting tool holder also comprises an anchoring element (170) received within the body of the holder, the fastening element being configured for secured engagement with the anchoring element and being free of such engagement with the seat bore.

A cutter assembly for a boring bar may include a cutter body, a cutter-element carrier, and an adjustment assembly having an adjustment element. The cutter-element carrier may be configured to be slidingly received in a channel in the cutter-body. The cutter-element carrier may have a first surface transverse to the first line. The adjustment element may have a second surface defining a position of the cutter-element carrier in the channel when the second surface is in contact with the first surface. The adjustment element may be movable along a second line transverse to the first surface for adjusting the position of the cutter-element carrier in the channel. The cutter body may include first and second recess portions. First and second insert portions may be inserted into the first and second recess portions, respectively, and may define float travel-limits for the cutter body.

A tool system includes a machine-proximal shank configured to be introduced into a driven tool receptacle and containing a device for transferring a rotating movement to be picked up from the driven tool receptacle. A tool-proximal shank is configured as a tool holder or to have a tool holder releasably connected thereto. A gear mechanism disposed between the machine-proximal shank and the tool-proximal shank is configured to transfer a rotating movement transmitted by the device in a reduced manner to the tool-proximal shank. At least one insert seat configured on the tool holder for receiving an interchangeable cutting insert is provided on an end face of the tool holder extending transversely to a longitudinal axis of the tool holder. A method for machining a workpiece is also provided.

A machining tool includes a tool carrier with at least one seat receiving an exchangeable, indexable cutting insert. A fastening screw fastening cutting insert to seat has a head section for support on the cutting insert and a shaft section at least regionally having an external screw thread. The seat has a contact face supporting an underside of the cutting insert and at least one lateral bearing face supporting a side surface of the cutting insert. A through-hole is formed in the contact face, through which the shaft portion of the fastening screw extends. A clamping element is disposed on the tool carrier on the rear side of the contact face of the seat, in which an internal screw thread is formed, cooperating with the external screw thread of the fastening screw. The fastening screw and the clamping element can be jointly displaced in a displacement direction.