engrenagem grande
1. A large mechanical wheel with teeth that meshes with other gears to transmit motion or power in machinery
The large gear in the transmission system rotates at a slower speed than the smaller pinion gear.
A engrenagem grande no sistema de transmissão gira mais lentamente do que a engrenagem menor.
2. In mechanics, the driving or driven wheel of significant size used in power transmission
The factory replaced the worn large gear to restore proper machinery function.
A fábrica substituiu a engrenagem grande desgastada para restaurar o funcionamento adequado da máquina.
In industrial and automotive contexts across Brazil and the USA, 'large gear' terminology is standardized in technical manuals and mechanical training. In Portuguese-speaking regions, 'engrenagem grande' is the standard technical term, while 'coroa' (crown) is also used colloquially in automotive repair shops to refer to the larger gear in a pair.
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