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A sheave or pulley wheel is a pulley using an axle supported by a frame or shell (block) to guide a cable or exert force. A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.
The second longest single trough belt conveyor is the 26.8-kilometre-long (16.7 mi) Impumelelo conveyor near Secunda, South Africa. It was designed by Conveyor Dynamics, Inc. based in Bellingham, Washington, USA and constructed by ELB Engineering based in Johannesburg South Africa.
A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
The largest drone to be manufactured in South Africa and in Africa, it has an endurance of up to 35 hours of flight time and a payload capacity of 210 kg. [85] Production for the Milkor 380 is currently set at 6 systems per year with plans to increase it by up to 16 systems per year.
The G6 Rhino also known as "GV6 Renoster" is a South African 155 mm long-range mine-resistant wheeled self-propelled howitzer and is the largest piece of artillery system in the South African Army arsenal; the army originally had 153 in service, but due to the lack of external threats and the end of the Cold War, the government sold 110 units ...
Useful versions of shade cloth appeared in the early 1990s especially in Australia and South Africa. For most of the 1990s there was some confusion about what these new devices should be called however they are now most commonly called shade sails throughout Australia, South Africa and the U.S.A. Shade sails have yet to have a significant ...
A type of pulley with a grooved wheel known as a sheave is used in zip-lines, and the pulley turns as it travels along, thus reducing friction and enabling greater speed than would otherwise be possible. [27] The zip-line trolley ("zipliner") is the frame or assembly together with the pulley inside that run along the cable. [28]
A conveyor pulley is a mechanical device used to change the direction of the belt in a conveyor system, to drive the belt, and to tension the belt. Modern pulleys are ...
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