1. mangle rackmangle rack. (mach.) see: under mangle, n...see: rackmangle rack (mach.), a contrivance for converting continuous circular motion into reciprocating rectilinear motion, by means of a rack and pinion, as in the mangle. the pinion is held to the rack by a groove in such a manner that it passes alternately from one side of the rack to the other, and thus gives motion to it in opposite directions, according to the side in which its teeth are engaged...see: mangle
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