Patent ID: 6500383
Filing Date: 2002-12-31
Classification: B23G,Y10T

Abstract:
A tapping tool having a lower end and an upper end and comprising a threaded portion (2) having an outer threaded cylindrical surface and an upper gripping shank (3), characterised by presenting a blind axial bore (4) that is closed at said lower end and opens at said upper end, there being present in said threaded portion at least one duct (7) connected to said bore (4), having a mouth which opens directly on said outer surface of said threaded portion (2), said mouth having an outer rim wholly formed by the intersection of the duct (7) with the outer threaded cylindrical surface of the threaded portion (2), one side of said outer rim forming a sharp edge for removing the material, which then by passing through said duct (7) collects inside said bore (4), wherein said outer rim of said mouth constitutes the sole means for cutting the material and when said tool is in operation, said bore does not contain any liquid.