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An auger is a device for moving material or liquid (see Archimedes' screw) by means of a rotating helical flighting. The material is moved along the axis of rotation. For some uses the helical 'flighting' is enclosed in a tube, for other uses the flighting is not encased. An integral part of a drill, the auger of the drill bit, uses this mechanism to remove shavings from the hole being drilled.

Auger

An auger is a device for moving material or liquid (see Archimedes' screw) by means of a rotating helical…

"Other species, which also bore into timber in their larva state, are well known by the name of <em>Death-watch - Anobium -</em> from their habit of knocking with their jaws against the wood-work upon which they are standing, this being the call of the insect to its mate." &mdash; Goodrich, 1859

Deathwatch Beetles

"Other species, which also bore into timber in their larva state, are well known by the name of Death-watch…

A small instrument of various forms and sizes, for boring.

Bit

A small instrument of various forms and sizes, for boring.

A brace or brace and bit is a hand tool used to drill holes, usually in wood. Pressure is applied to the top and the tool is rotated with a U-shaped grip. The U-shaped part is a kind of crankshaft. It gives the brace much greater torque than other kinds of hand drill; a brace can be used to drill much wider, and deeper, holes than can a gear-driven hand drill.

Brace and Bits

A brace or brace and bit is a hand tool used to drill holes, usually in wood. Pressure is applied to…

It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill. The cylinder is supported upon a heavy tripod that may stand in any position and present the point of the drill in any direction. The steam or compressed air is conveyed to the cylinder through a hose, and when ready for work it delivers its tremendous thundering blows upon the rock in rapid succession.

Pneumatic Rock Drill

It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill.…

A trepan used for boring large shafts.

Large trepan

A trepan used for boring large shafts.