worm(wheel) hob

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worm-wheel hob thread — noun : the thread form on hobs used for cutting worm wheel teeth or worm threads … Useful english dictionary
Hob — Hob, n. [Prob. akin to hump. Cf. {Hub}. ] [1913 Webster] 1. The hub of a wheel. See {Hub}. Washington. [1913 Webster] 2. The flat projection or iron shelf at the side of a fire grate, where things are put to be kept warm. Smart. [1913 Webster] 3 … The Collaborative International Dictionary of English
literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… … Universalium
machine tool — machine tooled, adj. a power operated machine, as a lathe, used for general cutting and shaping of metal and other substances. [1860 65] * * * Stationary, power driven machine used to cut, shape, or form materials such as metal and wood. Machine… … Universalium

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