Clamping device for the supply of process liquids to drill body

摘要

A clamping device (17) with provision for the supply of process liquids to an internal channel (14) of a drill (10) is provided. The clamping device consists of a body (3), provided with a cavity (23) for receiving the drill (10) and at least one clamping hole (15) for a screw at one end and a shank (16), which can be clamped in a spindle (18) of a machine tool, at the other end. The body (3) is arranged in the cavity (11) of a collar (2) so as to to be axially fixed by a cover (1) but rotatable in bearings (4). The collar (2) has an circumferential groove (20) in its inner wall connected to a process liquid supply port (8). The body (3) is provided with a radial channel (12) in fluidic connection with the annular groove (20). The radial channel (12) is connected to an axial channel (13), which is connected to the drill receiving cavity (23). Air may also be supplied via a port (7) to further circumferential grooves (19) to prevent coolant reaching the bearings (4).