Drilling tool for removal of splinter, has machining area running from central point till to cutting corner, whose profile runs in longitudinal direction of area so that machining effect is obtained at cutter, during re-sharpening of tool

摘要

The tool has a machining groove (1) running rearwards in spiral and axial manner from a cutting edge. A blade runs radially outwards in an inclined manner from a longitudinal axis at a drill bit. The groove exhibits elevation units or recesses (2), which runs parallel to the longitudinal axis, where transition from a front surface to the groove forms a cutting edge. A machining area runs from a driller central point till to an outer cutting corner, whose profile runs in a longitudinal direction of the area so that machining effect is obtained at the cutter, during re-sharpening of a tool.