Drilling tool for producing undercuts in drilled holes

摘要

The drilling tool is used for drilling and for producing undercuts in the drilled hole and has a drill head which is provided with several end cutting edges for drilling and several side cutting edges for producing the undercut. The end cutting edges merge into the associated side cutting edges. The large number of end and side cutting edges give the drilling tool considerable smoothness of action and reduce its wear and risk of fracture. A drilled hole with great roundness accuracy and an exact undercut can be produced by the multiplicity of end cutting edges.