Definition of countershaft in English:



  • A machine driveshaft that transmits motion from the main shaft to where it is required, such as the drive axle in a vehicle.

    • ‘A popular solution is to spread the gear sets over three, instead of the usual two, countershafts, trading length for width.’
    • ‘The primary drive is by a pair of duplex chains driving a pair of countershafts to the drive wheels at a ratio of about 20-1, via a pair of Go-cart chains.’
    • ‘The third and fourth countershafts have gears rotatably engaged with the fourth forward mainshaft gear and an output shaft splitter gear.’
    • ‘Since the force on the right countershaft is downward, neither a tenon nor a handwheel is required.’
    • ‘The countershaft can be adopted for extremely sophisticated engines with high cylinders.’