Cylindrical head boring tool

摘要: A cylindrical head boring tool (1), such as a Forstner drilling tool, with main cutting edge (4) having centering point (5). The extends diametrically across the entire circular cross-section of (3), cut out surfaces (11), and chip channels (7) adjacent (4). open through outer periphery extending obliquely (3). Each end is preliminary (8) coinciding circumference (3) for guiding (1). reaches to respective other channel forms peripheral an essentially cylindrically curved wall (6) otherwise smooth interrupted by radial throats (13).