(engineering) functional unit of an apparatus that breaks solid materials into smaller pieces

The fifth and typically highest gear of an engine.

The first gear of an transmission, which provides the lowest output speed and greatest mechanical advantage.

The third gear of an engine.

A system of gears that has a central gear wheel (sun gear) around which others (planet gears) rotate, often within an outer ring.

a system of gears that has a central gear wheel around which others rotate, often within an outer ring

An arrangement of bevel gears permitting the rotation of two shafts at two different speeds whilst supplying the same torque; used on the drive axles or between the driven wheels of automobiles to aid cornering.

(mechanics) A wheel with a toothed rim, intended to engage with others, or similar equipment, to form a gear.

(uncountable, countable, aviation) The wheels, tyres, brakes, shock absorbers etc of an aircraft; its undercarriage.

The highest gear that is available in a motor vehicle or car.