countershaft

American  

[koun-ter-shaft, -shahft] / ˈkaʊn tərˌʃæft, -ˌʃɑft /

noun

Machinery.

1. jackshaft.

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countershaft British  

/ ˈkaʊntəˌʃɑːft /

noun

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

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Other Word Forms

• countershafting
  noun

Etymology

Origin of countershaft

First recorded in 1860–65; counter- + shaft

Example Sentences

Kawasaki offers optional parts for the KX250, including carburetor tuning parts, ignition rotors, a larger countershaft sprocket, aluminum and steel rear sprockets, solid brake discs for wet racing conditions and a 20-inch front wheel.

From Time Magazine Archive

The chain looks good and the countershaft sprocket looks pretty good.

From Time Magazine Archive

The chain reaches its tightest point when there suspension is compressed so that there's a straight line between the rear axle, swingarm pivot, and countershaft sprocket.

From Time Magazine Archive

When changing rear sprockets, it's always a good idea to check the condition of your chain as well as the countershaft sprocket.

From Time Magazine Archive

When direct drive cannot be had, a belt must be used, either from a main shaft, or a countershaft.

From Electricity for the farm Light, heat and power by inexpensive methods from the water wheel or farm engine by Anderson, Frederick Irving