Rock shaft
Rock shaft Rock" shaft` [Cf. {Rock}, v. i.] (Mach.) A shaft that oscillates on its journals, instead of revolving, -- usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also {rocker}, {rocking shaft}, and {way shaft}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

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  • Rock — 1. n. 1 a the hard material of the earth s crust, exposed on the surface or underlying the soil. b a similar material on other planets. 2 Geol. any natural material, hard or soft (e.g. clay), consisting of one or more minerals. 3 a a mass of rock …   Useful english dictionary

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