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An auger is a device to drill wood or other materials, ... More modern versions have elaborated auger bits with multiple blades in various positions. [2]
A post-hole auger. An earth auger, earth drill, or post-hole auger is a drilling tool used for making holes in the ground. [1] It typically consists of a rotating vertical metal rod or pipe with one or more blades attached at the lower end, that cut or scrape the soil.
Auger bit, a drill bit; Auger conveyor, a device for moving material by means of a rotating helical flighting; Auger (platform), the world's first tension leg oil rig; see Big, Bigger, Biggest; Earth auger, a drilling tool or machine used for making holes in the ground; Wood auger, a drill for making holes in wood (or in the ground)
The cutting principles of the auger bit are the same as those of the center bit above. The auger adds a long deep spiral flute for effective chip removal. Two styles of auger bit are commonly used in hand braces: the Jennings or Jennings-pattern bit has a self-feeding screw tip, two spurs and two radial cutting edges. This bit has a double ...
The cutting edge of the bit can be of many shapes, the spiral auger being the standard shape since the 19th century. Timber framers boring machines were invented by 1830 and hold an auger bit. They made mortising easier and faster. Draw knives are used to chamfer edges of beams and shape pegs
Before boring machines were invented, carpenters used hand-powered augers to bore holes. Most common were T-handled augers. The shape of the drill bits changed over time, with the spoon bit and shell bit being common before the invention of the spiral or twist bit in 1771 [1] which removes the cuttings as it turns.