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Drill bit, has main cutting edge divided into two partial cutting edges, where one of edges is designed as free cutting edge with clearance angle opposite to free cutting edge-accessory end flank which is attached with free edge
Drill bit, has main cutting edge divided into two partial cutting edges, where one of edges is designed as free cutting edge with clearance angle opposite to free cutting edge-accessory end flank which is attached with free edge
The bit (1) has a main cutting edge divided into two partial cutting edges, where one of the edges is designed as a guiding cutting edge (5) with a guiding bevel. The guiding edge has a supporting bevel (14) that is provided at a guiding cutting edge-accessory end flank (11) such that the bevels limit the guiding flank in a rotating direction of the bit. The guiding flank is attached to the guiding edge. The other edge is designed as a free cutting edge (6) with a clearance angle opposite to a free cutting edge-accessory end flank which is attached with the free edge.
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