large auger or borer

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• sack borer — noun : a device used in mining for sinking shafts in soft ground by boring to the full size with a very large tool resembling an auger behind the cutters of which large sacks are attached to catch material as it is removed …   Useful english dictionary

• Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …   Wikipedia

• tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

• Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …   Wikipedia

• Milling machine — For the machine used in road construction, see Asphalt milling machine. Not to be confused with mill (grinding). Example of a bridge type CNC vertical milling center …   Wikipedia

• Bostrichidae — Taxobox name = Bostrichidae image caption = Amphicerus cornutus image width = 250px regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Coleoptera superfamilia = Bostrichoidea familia = Bostrichidae familia authority = Latreille, 1802… …   Wikipedia

• Lawn mower — A typical modern gasoline powered push mower. A riding mower or ride on …   Wikipedia

• Lathe (metal) — Center lathe with DRO and chuck guard. Size is 460 mm swing x 1000 mm between centers A metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to… …   Wikipedia

• Chainsaw — For other uses, see Chainsaw (disambiguation). An arborist using a chainsaw to fell a eucalyptus tree A chainsaw (or chain saw) is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most common …   Wikipedia

• Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… …   Wikipedia

• Grinding wheel — Grinding wheels A grinding wheel is an expendab …   Wikipedia