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Diamagnetic levitation seems promising because of its accurate control, zero friction, and zero wear, but becomes less reliable at higher payloads as its max bearing pressure is in the order of 102. Therefore, ferrofluids, with a max bearing pressure in the order of 2 x 104, have been studied to increase the amount of weight that magnetic force ...
A magnetic bearing. A magnetic bearing is a type of bearing that supports a load using magnetic levitation.Magnetic bearings support moving parts without physical contact. For instance, they are able to levitate a rotating shaft and permit relative motion with very low friction and no mechanical w
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Superlubricity is a regime of relative motion in which friction vanishes or very nearly vanishes. However, the definition of "vanishing" friction level is not clear, which makes the term vague. As an ad hoc definition, a kinetic coefficient of friction less than 0.01 can be adopted. [1] This definition also requires further discussion and ...
Road slipperiness can be measured either in terms of the friction between a freely-spinning wheel and the ground, or the braking distance of a braking vehicle, and is related to the coefficient of friction between the tyre and the road surface. Public works agencies spend a sizeable portion of their budget measuring and reducing road slipperiness.
A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.
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