Definition of reduction gear in US English:

reduction gear


  • A system of gearwheels in which the driven shaft rotates more slowly than the driving shaft.

    • ‘The engine had a spur reduction gear which meant that the entire engine installation was shorter while having a higher thrust line.’
    • ‘There are two reduction gears with pitch actuators, driving two independent shafts with controllable pitch propellers.’
    • ‘We have shown that a V-belt can handle those torque loads when it drives a reduction gear at the crankshaft.’
    • ‘Usually, the electric motor needs a reduction gear for maximum efficiency.’
    • ‘The motors are fitted with a two-speed reduction gear.’