Drill train assembly provided with drilling head and drilling tube

摘要

The drillhead (5) is provided with at least one drilling waste disposal channel (12) which with an outer end facing the cutting edge issues into a waste accommodation aperture (13). In the drill waste material disposal channel via at least one feed conduit (14) at least one flushing medium feed conduit (15) issues, the flushing medium having a flow direction in the disposal channel turned away from the cutting edge (10). The drililng head with an end turned away from the cutting edge via a coupling (16) can be releasably coupled with the drilling tube. The drilling tube is provided with at least one drilling waste disposal channel.