To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.

A tool holder is provided comprising a base body for coupling with a drive spindle that can be driven rotatingly, whereon a clamping chuck for clamping a tool is provided, further comprising a damping element arranged between the base body and the clamping chuck, wherein the damping element is made of an elastomeric material or of a shape memory alloy, and wherein the clamping chuck is solely connected to the base body by means of the damping element.

A drilling tool with: a shaft; a seat at one end of the shaft; a drill bit, which is arranged on the seat; and a clamping section, which is provided on the shaft and can interact with the drill bit. Also provided is a tensioning screw, which is screwed into the shaft and comprises an expanding section as well as a contact section. The expanding section interacts with the clamping section, and the contact section interacts with the drill bit.

A cutting tool fastener having a rotation axis and configured to secure together, and establish a fluid path between, two cutting tool members, while also accommodating angular and pivotal displacement between the two. The fastener comprising a head with at least one head opening for emitting fluid, and a body which extends from the head and has a body opening for receiving fluid to be emitted via the head opening. The head has a spherical head abutment surface with a bottom spherical seal surface zone. At least a portion of the spherical head abutment surface faces the body, and the head opening opens out to the spherical head abutment surface. The bottom spherical seal surface zone is axially located between the body and the head opening.

To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.

A tool holder is provided comprising a base body for coupling with a drive spindle that can be driven rotatingly, whereon a clamping chuck for clamping a tool is provided, further comprising a damping element arranged between the base body and the clamping chuck, wherein the damping element is made of an elastomeric material or of a shape memory alloy, and wherein the clamping chuck is solely connected to the base body by means of the damping element.

A cutting tool fastener having a rotation axis and configured to secure together, and establish a fluid path between, two cutting tool members, while also accommodating angular and pivotal displacement between the two. The fastener comprising a head with at least one head opening for emitting fluid, and a body which extends from the head and has a body opening for receiving fluid to be emitted via the head opening. The head has a spherical head abutment surface with a bottom spherical seal surface zone. At least a portion of the spherical head abutment surface faces the body, and the head opening opens out to the spherical head abutment surface. The bottom spherical seal surface zone is axially located between the body and the head opening.

A clamp for a tool holder is disclosed. The clamping tool holder includes a body having an insert-receiving pocket and a threaded clamp-receiving bore with a coolant opening for receiving pressurized coolant from a coolant source. A clamp includes a threaded aperture extending from a top surface to a bottom surface and coolant passages in fluid communication with a coolant header. A clamp screw is threaded into the threaded aperture of the clamp. The clamp screw includes a plurality of coolant passages in fluid communication with the coolant opening of the body, and at least one coolant channel in fluid communication with the coolant passage. Coolant from the coolant source enters the coolant opening of the body, travels into the clamp screw, travels into each coolant passage of the clamp, and then exits the clamp in a direction toward a cutting insert-workpiece interface.

A drilling tool with: a shaft; a seat at one end of the shaft; a drill bit, which is arranged on the seat; and a clamping section, which is provided on the shaft and can interact with the drill bit. Also provided is a tensioning screw, which is screwed into the shaft and comprises an expanding section as well as a contact section. The expanding section interacts with the clamping section, and the contact section interacts with the drill bit.

A clamp for a tool holder is disclosed. The clamping tool holder includes a body having an insert-receiving pocket and a threaded clamp-receiving bore with a coolant opening for receiving pressurized coolant from a coolant source. A clamp includes a threaded aperture extending from a top surface to a bottom surface and coolant passages in fluid communication with a coolant header. A clamp screw is threaded into the threaded aperture of the clamp. The clamp screw includes a plurality of coolant passages in fluid communication with the coolant opening of the body, and at least one coolant channel in fluid communication with the coolant passage. Coolant from the coolant source enters the coolant opening of the body, travels into the clamp screw, travels into each coolant passage of the clamp, and then exits the clamp in a direction toward a cutting insert-workpiece interface.