Rock drill for drilling explosive holes in mining industry, has guidance area with inner core designed in single-piece with shaft and towing area, and outer guide bush fastened to core, where bush diameter is larger than shaft diameter

摘要

The drill has a sink hole running longitudinally through a tubular shaft (3), and a guidance area (10) with a cross-hole that leads into the sink drill. The guidance area is formed of an inner core (12) that is designed in a single-piece with the shaft and a rotary towing area, and an outer guide bush (13) that is detachably fastened to the core, where diameter (H) of the bush is larger than diameter of the shaft.