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Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key. A Torx T8 screw head on a hard disk drive.. Torx (pronounced / t ɔːr k s /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron.
The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench—an adjustable pipe wrench. [1] In North American English, wrench is the standard term. The most common shapes are called open-end wrench and box-end wrench.
Some Coes wrenches could be bought with wooden knife handles, recalling the company's earlier knives. In 1909, the Coes Wrench Company advertised a six-foot-long "key" wrench, shaped like a monkey wrench, for use on railroads. [7] [8] The Coes wrench designs were acquired by the toolmaker Bemis & Call of Springfield, Massachusetts, in 1928 ...
A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver has been replaced in many workplaces and homes with a more modern and versatile tool, a power drill, as they are quicker, easier, and can also drill holes. The shaft is usually made of ...
The Upright Shaft is the main vertical shaft found in Smock and Tower mills. It is also found in some Post mills. It carries the Wallower at its top end, and a Great Spur Wheel at the bottom end. The Great Spur Wheel drives two or more Stone nuts. Wallower The Wallower is a driven gear at the top of the Upright Shaft in
Aldila, Inc. is a sports equipment manufacturing company based in Carlsbad, California, United States.The company specializes in OEM and consumer golf club shafts, but also manufactures other carbon fiber products.
The "Murray Springs shaft wrench" appears to be a unique North American example of a similar tool made of bone and comes from the Clovis culture. It dates to about 9,000 years ago and was found in Arizona, where it is now in the Arizona State Museum. It is 259mm long and undecorated, with a simple shaft with a larger end, which has a single ...