FIELD: instrument making.
SUBSTANCE: invention relates to tools for drilling or boring and can be used in machining materials by boring or drilling crowns with replaceable cutting sections. Drill bit is rotatable about an axis and has a cutting portion with one or more cutting segments and a first plug-in connecting element, and a drill shank portion with a second plug-in connecting element, which forms a plug-in connection with first plug-in connecting element. First plug-in connecting element and second plug-in connecting element can be connected by means of a pin connection.
EFFECT: reliable connection of drill rod section and cutting section, reduced costs for replacement of cutting elements.
15 cl, 4 dwg
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