THE PRECISION BORING AUGER BIT FOR DRILLING IN THE EARTH AND THE METHOD THEREOF

摘要

PURPOSE: A precision boring auger bit for drilling ground is provided to reduce an excavation process time and to improve the precision of construction by improving the directivity of excavation work. CONSTITUTION: A precision boring auger bit for drilling ground comprises an auger part(10), an air hammer part(20), and a drilling bit part(30). The auger part has a screw axis(12). A screw wind(13) is formed in the outside of the screw axis. The air hammer part progresses using the compressed air pressure flowing in a compressed air pressing part(21). The drilling bit part forms a pilot bit(32) on the center leading end of a bit body part(31).