DEVICE FOR CLEANING A SPIRAL
INTERMEDIATE SPACE OF A
DRILL BIT AND METHOD FOR PRODUCING A DRILLING
MACHINE. The present invention relates to a device for cleaning a spiral
intermediate space of a
drill bit, with a
retainer for retaining the device on a mast of a drilling
machine, a
guide tube which encompasses the
drill bit in some sections and is mounted on the
retainer, and a cleaning element that engages in the spiral
intermediate space and is mounted on the
retainer in a freely rotatable manner around the geometric axis of drilling.According to the present invention, the
guide tube is mounted on the retainer in a freely rotatable manner around the geometric axis of drilling; the cleaning element is fixed to the rotatably mounted
guide tube; for cleaning, the guide tube is axially fixed in the direction of the geometric axis of drilling; and, through a
drill bit extraction method, the cleaning element with the guide tube can be offset by one rotation around the geometric axis of drilling. Furthermore, the present invention relates to a method for forming a borehole in the ground with a drilling apparatus, wherein the device according to the present invention is used.