plural of first gear

plural of third gear

plural of fifth gear

plural of gear shift

(idiomatic) Proceeding fully, quickly, or completely; thoroughly begun and in progress.

(automotive) A mechanism which changes gears in a vehicle.

plural of bevel gear

(mechanical engineering) A kind of gear in which the two wheels working together lie in different planes and have their teeth cut at right angles to the surfaces of two cones whose apices coincide with the point where the axes of the wheels would meet.

plural of shrouded gear

A cogwheel or pinion having flanges which form closed ends to the spaces between the teeth and thus strengthen the teeth by tying them together.