# jackshaft

> English word · Noun

## Definitions
1. A common mechanical component used to transfer or synchronize rotational force in a machine.
2. A wheelless axle used to turn the wheels of a locomotive.

## Etymology
From jack + shaft.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/jackshaft