Permafrost outreach 2009

Drill bit is maybe one of the most important parts of drill system. If you don't have ideal drill bit for particular materials, we cannot drill efficiently. We prepair variety of drill bits for this trip. next a few days, we will show you what kind of bits we have and how works these drill bits! You can see 4 bits in the picture. All bits are fitting for augering fright, which we do not need water or air. these bits are designed for dry rotary drilling. This works great for ice, frozen silt but not for gravel. We will start these bits first at the school!