Deep-hole drill for inserting boreholes into work-pieces, has blade partitioned into partial cuts by chip divider, where cuts of blade are arranged together such that cut-normals are aligned to each other by cuts at angle of twenty degrees

摘要

The drill has a blade (S) formed at a drilling head, where the blade exhibits a cutting edge. The blade is partitioned into two partial cuts (T1, T2) by a chip divider for dividing chippings removed by the cutting edge. The partial cuts of the blade are arranged together such that cut-normals (N1, N2) are aligned to each other by the two partial cuts at an angle (W3) of 20 degrees. The chip divider is designed as a groove, and the drilling head is made of a wear-resistant material e.g. tungsten carbide. An outline is curved outwardly to an extent of the drill. The drilling head is made of a wear-resistant material i.e. tungsten carbide.