FLIGHTLESS ROCK AUGER FOR USE WITH PRESSURE DRILLS WITH QUICK ATTACHMENT AND METHOD OF USE

摘要

A flightless rock auger (10) is used for drilling postholes through rock wit h the use of hydraulic pressure and at slow revolution per minute and can function utilizing only the weight of the auger. The rock auger is used in combination with a conventional flighted auger used for drilling postholes i n dirt and clay. Further, the rock auger (10) is designed for use with pressur e drilling units (16) as well for cutting a circular hole through the rock and forming a plug which is to be lodged in the cavity of the rock auger cylinde r (20) to be removed from the posthole. A portion of the cylindrical body (20) of the rock auger (10) can be removed to allow quick clearance of the plug.< /SDOAB>