Drill tool in particular twist drill with central coolant and lubricant duct, comprises specifically shaped fluid outlet

摘要

The axially positioned coolant and lubricant duct (3) is guided through the center of the tool (1) close to its tip, approximately a distance of three diameters away from its lower end. The duct (3) is branched and guided to the outer surface of the drill (1). Each of the outlets (4) is located at one of the fluted lands (6) and leads to a conveyor groove (7). The conveyor grooves (7) are parallel positioned to the chip removal grooves (5) ending at the side face (8) of the tool (1).