DRILL BIT FOR THE DRILLING, IN PARTICULAR PERCUSSION DRILLING OR ROTARY PERCUSSION DRILLING, OF HOLES IN SOIL MATERIAL OR ROCK MATERIAL

摘要

The invention relates to a drill bit (1) for the drilling, in particular percussion drilling or rotary percussion drilling, of holes in soil material or rock material, wherein the drill bit (1) comprises a drill head (2), which is provided with a plurality of hard-metal or hard-material inserts (11), at least one flushing opening (12) for dispensing flushing fluid, and holes (25) for removing drill cuttings, and a main body (3), which is designed as one piece with the drill head (1) and is to be connected by means of a drill rod (6) to a drive element for driving or acting on the drill bit (1), wherein the drill bit (1) is designed as two pieces, the main body (3), which is made of a material that is more ductile and softer than the material of the drill head (2), being designed with a thread (4), in particular an external thread, on the front end area (8) of the main body facing the drill head (2) in order to fasten the drill head (2). The main body (3) has a support surface (9) in the front end area (8) of the main body for a side of the drill head (2) facing away from the drilling surface.