countershaft

[ koun-ter-shaft, -shahft ]

Phonetic (Standard)IPA

noun

, Machinery.

countershaft

/ ˈkaʊntəˌʃɑːft /

an intermediate shaft that is driven by, but rotates in the opposite direction to, a main shaft, esp in a gear train

First recorded in 1860–65; counter- + shaft

A small lathe, with an 8-inch swing, can be obtained at a low cost, provided with a countershaft complete.

The countershaft rests in self-adjusting boxes, and has a tight and a loose pulley eight inches in diameter.

The feed and exhaust valves, M, are actuated by cams keyed to a countershaft driven by bevel wheels from the main shaft.

Let the diameter of the second driven be 12; then its driver on the countershaft must be 24.

The sides of this machine a, a, Fig. 3099, are cast with an extension for countershaft.

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