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The non-self-centering action of the independent jaws makes centering highly controllable (for an experienced user), but at the expense of speed and ease. Four-jaw chucks are almost never used for tool holding. Four-jaw chucks can be found on lathes and indexing heads. Self-centering chucks with four jaws also can be obtained.
The faceplate was the ancestor of lathe chucks, an arrangement of three or more adjustable 'dogs' bolted to the faceplate providing a primitive chuck arrangement. The smaller plate in the upper photo is specifically a 'dog face' with slots intended to hold a bent tail dog while the work itself was supported on centers.
The Jacobs Taper (abbreviated JT) is commonly used to secure drill press chucks to an arbor. The taper angles are not consistent varying from 1.41° per side for No. 0 (and the obscure # 2 + 1 ⁄ 2) to 2.33° per side for No. 2 (and No. 2 short). There are also several sizes between No. 2 and No. 3: No. 2 short, No. 6 and No. 33.
Bison antiquus is known from fossils found across North America south of the Laurentide Ice Sheet (whose southernmost extent is around the modern United States-Canada border), ranging from southern Canada (southern Alberta [8] and Ontario [10]) in the north, and Washingon State [11] and California [12] in the west, southwards to Southern Mexico [9] and eastwards to South Carolina and Florida.
[1] [2] The weapon is made out of the mandible of an elk, bison, horse or bear. It was common practice to add leather to make a weapon's handle. Such war club were sometimes painted with symbols of tribal significance. [3] Despite being a relatively primitive weapon, it was considered highly effective, and saw widespread use in prehistoric ...
Bison on Catalina Island. The Catalina Island bison herd is a small group of introduced American bison living on Catalina Island off the coast of Southern California. In 1924, several bison were acquired for a film shoot and, before the end of 1925, brought to Catalina. The bison are now quite popular with the tourists.
The Australian Light Armoured Vehicle (ASLAV) is an eight-wheeled armoured reconnaissance vehicle of the LAV II family used by the Australian Army. [3] It was built by General Dynamics Land Systems Canada, and developed from the U.S. Marine Corps' LAV-25 and Canadian Army's Bison armoured fighting vehicles.
Nintendo Labo [a] is a toys-to-life concept developed by Nintendo and released in April 2018. Labo consists of 2 parts, where one part is a game and one part is multiple sheets of cardboard.
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