sprocket

US /ˈsprɑː.kɪt ˌwiːl/
UK /ˈsprɑː.kɪt ˌwiːl/
"sprocket" picture
1.

roda dentada, pinhão

a toothed wheel that engages with a chain, track, or other perforated material

:
The bicycle chain runs over the sprocket.
A corrente da bicicleta passa sobre a roda dentada.
The tank's track is driven by a large sprocket.
A esteira do tanque é acionada por uma grande roda dentada.