axle

axle

Pin or shaft on or with which wheels revolve; with fixed wheels, one of the basic simple machines for amplifying force. Combined with the wheel, in its earliest form it was probably used for raising weights or water buckets from wells. Its principle of operation can be illustrated in the attachment of large and small gears to the same shaft; the tendency of a force applied at the radius on the large gear to turn the shaft is sufficient to overcome a larger force at the radius on the small gear. The mechanical advantage is equal to the ratio of the two forces and also equal to the ratio of the radii of the two gears.

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axle

a bar or shaft on which a wheel, pair of wheels, or other rotating member revolves

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axle [′ak·səl]

(mechanical engineering)

A supporting member that carries a wheel and either rotates with the wheel to transmit mechanical power to or from it, or allows the wheel to rotate freely on it.

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AXLE - An early string processing language. Program consists of an assertion table which specifies patterns, and an imperative table which specifies replacements. "AXLE: An Axiomatic Language for String Transformations", K. Cohen et al, CACM 8(11):657-661 (Nov 1965).