FIELD: process engineering.
SUBSTANCE: invention relates to machine building and may be used for boring. Drill comprises intake part an front part extending along central axis to be coupled by drive joint including, at least, two connection pairs separated and offset from central axis. Every said connection pair is composed of engaged connectors: intake seat and drive pin. Connectors are made so that intake part and front part are aligned with the help of said connectors in assembly. Connectors feature asymmetric cross-sections diverging as distance from central axis increases and arranged to make clearance there between on assembly. Besides they feature different-geometry cross-section to allow them to gripped one in the other at relative rotation.
EFFECT: efficient transmission of high torque.
16 cl, 14 dwg
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