Equipment Specs
Auger Drill
An auger is a tool shaped in the design of spiral that was originally devised to move materials or water from one location to another through a downward rotating action. An auger is also a type of drill bit that uses the same spiral design and rotating action to remove shavings and debris as it drills or bores a hole.[1]

Archimedes first devised an auger called a water screw in 200 B.C. that was primarily used to transfer water from lower elevations to higher ones. A similar technology is still widely used in water pumps today.[2]

The incorporation of the auger design into various types tools and pieces of equipment is endless. For example, snow blowers use an auger to move snow towards an impeller that tosses the snow through a chute for discharge.[3]

A combine, an agricultural harvesting machine, also uses an auger. In the combine, an auger located inside a tube and another one not enclosed in a tube are used to move un-threshed crops directly into a threshing apparatus before the grain is dispensed in and out of a hopper.[4] Another type of auger used for agricultural purposes is a grain auger.

[edit] Auger Drills

See also:  Auger Drill

Auger design is key to the functioning of all different kinds of drills used in construction and mining. An auger type drill is commonly used to dig or bore downwards in loose soil, earth, or very soft rock. Auger drills can range in size, type, and function and are affixed to a drill bit or different types of construction equipment such as skid steer loaders, mini excavators, knuckleboom cranes, and small backhoes as a larger attachment.[5] The advantage of an auger drill is that it minimizes operating costs by mechanically clearing debris from the hole while simultaneously drilling. As a result, the need for pumps or compressors for clearing debris out of the hole is eliminated.[6]

[edit] Types of Auger Drills

Auger rods are a type of drill used in mining to drill in hard rock and unstable ground.[7]

A pneumatic auger drill uses compressed air and is widely used in mining, tunneling, and for drill shot holes to plant explosives in road repairs to break apart existing pavement. The drill contains an air-operated piston that delivers hammer blows to the drill bit multiple times a second. The pneumatic drill was first developed in 1861 by Germain Sommellier and used for tunneling in the Alps.[8]

A continuing flight auger drill is driven by a top-down rotary machine and is supported by holes that are deep and small in diameter. Cuttings or debris are lifted to the surface by the helical flight motion of the blade. A continuing flight auger drill is used for site investigation, geo-chemical sampling, environmental drilling and sampling, alluvial mineral investigations, and drilling electrode holes.[9]

A hollow auger drill is a continuous flight auger drill, except with a hollow center tube, and normally operated with a plug bit held in place by a secondary internal rod string or simply by friction.[10]

The short flight and plate auger drill is also referred as a bucket auger drill. As the drill rotates downwards into the earth or ground, it is loaded with cuttings or debris and then pulled back out of the hole. When the drill reaches the surface, the cuttings are in effect "spun" off the drill. This type of drill is used for penetrating and drilling holes of a large diameter.[11]

[edit] References

  1. What is an Auger? 2008-09-09.
  2. What is an Auger? 2008-09-09.
  3. What is an Auger? 2008-09-09.
  4. What is an Auger? 2008-09-09.
  5. Hydraulic Hole Diggers. 2008-09-09.
  6. The Australian Drilling Industry Training Committee Ltd. Drilling. CRC Press: 1997.
  7. Auger Steel. 2008-09-09.
  8. Pneumatic Drill. 2008-09-09.
  9. The Australian Drilling Industry Training Committee Ltd. Drilling. CRC Press: 1997.
  10. The Australian Drilling Industry Training Committee Ltd. Drilling. CRC Press: 1997.
  11. The Australian Drilling Industry Training Committee Ltd. Drilling. CRC Press: 1997.