GEAR TO DRILL ADDITIONAL SHAFT FROM HOLE

摘要

hole drilling. SUBSTANCE: invention specifically refers to tools used to drill new shafts from holes. Gear has hollow body made in the form of tube corrugated longitudinally. One end of tube is fixed on wedge, the other end is capped. Spaces of body and enclosure are leak-tight and intercommunicate. EFFECT: enhanced operational reliability of gear thanks to simplification of its structure and provision for accurate and reliable setting in hole. 1 cl 3 dwg