Abstract: An improved overburden eliminator rock drill bit (10) is provided which includes a cylindrical body (12), cutting inserts (14) mounted thereon, and squared grooves (16) formed along the length of body (12) in a vertically tapered fashion. The taper of grooves (16) is counterclockwise in slope when viewed from the top, i.e. as viewed from above rearward end (20). Cutting face (22) engages overburden as cutting edges (30) cut overburden material so that it may be blown upwardly along grooves (16) by fluid pressure exerted through openings (32). The taper of grooves (16) serves to facilitate the upward migration of overburden material during the counter clockwise rotary action of bit (10).