Mapal's one-shot solution for conrod bores

A further benefit is that with the new drill, the threaded through hole and threaded tap hole are produced by the same tool. This means that there is no possibility of misalignment of the two sections, and that the overall bore quality is considerably improved.

 The tool’s special geometry, coating and edge preparation, together with the use of four guide chamfers ensure optimum process reliability with very high performance and tool life. A further innovation is a newly developed chip guiding stage (patent pending), which means that only short spiral chips are produced at the countersink diameter. These chips are easily discharged and cannot wrap around drill or chuck.

 In order to guarantee process reliability and consistently good results in mass production, the drill is manufactured from a special ductile carbide material. In combination with its sturdy geometry, this means it is ideally suited to the production of larger quantities of connecting rods.