Patent ID: 6450272
Filing Date: 2002-09-17
Classification: B23B

Abstract:
A drill, comprising a body having mortise means (7); and a solid hard metal head (4) having an end surface (5) and a plurality of bits formed integrally with the head (4), located in a radially outer region of the head (4) and having each a side surface (6) extending substantially parallel to a rotational axis (A) of the drill, the solid hard metal head (4) being secured to the drill body along the end surface (5) thereof and, additionally, over the side surfaces (6) partially extending into mortise means (7), with the side surfaces (6) including first surfaces (6a, 6b), which are associated with at least some of the bits (3) and are subjected to pressure acting in a rotational direction of the drill during operation of the drill.