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2. Belt (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Belt_(mechanical)

   Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. In a two pulley system, the belt can either drive the pulleys normally in one direction (the same if on parallel shafts), or the belt may be crossed, so that the direction of the driven shaft is reversed (the opposite direction to the ...

3. Conveyor pulley - Wikipedia

   en.wikipedia.org/wiki/Conveyor_pulley

   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 ...

4. Lawn mower - Wikipedia

   en.wikipedia.org/wiki/Lawn_mower

   A lawn mower (also known as a grass cutter or simply mower, also often spelled lawnmower) is a device utilizing one or more revolving blades (or a reel) to cut a grass surface to an even height. The height of the cut grass may be fixed by the mower's design but generally is adjustable by the operator, typically by a single master lever or by a ...

5. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   Assuming that the chain is massless, F X = 0 because segment X is not supporting any weight. Taking the system at equilibrium, F W and F Y are equal—if they were not, the lower pulley would freely turn until they were. Next, the downward force acting on the lower pulley equals the upward forces acting on it, so F L = F W + F Y, or 2F W ...

6. Pulley - Wikipedia

   en.wikipedia.org/wiki/Pulley

   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.

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8. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   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.

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.