Bulldozer

A bulldozer or dozer (also called a crawler or Track-type Tractor) is a large tractor equipped with a metal blade at the front for pushing material (soil, sand, snow, rubble, or rock) during construction work. It travels most commonly on continuous tracks, though specialized models riding on large off-road tires are also produced. Its most popular accessory is a ripper, a large hook-like device mounted singly or in multiples in the rear to loosen dense materials.

Bulldozers are used heavily in large and small scale construction, road building, mining and quarrying, on farms, in heavy industry factories, and in military applications in both peace and wartime. Track-type tractors (commonly bulldozers) are heavy-duty, tracked earthmoving machines designed for maximum traction, stability, and pushing power on soft, steep, or uneven terrain. Utilizing continuous steel or rubber tracks, they excel in land clearing, heavy grading, and fine finish work. Key benefits include lower ground pressure and superior flotation compared to wheeled machines.

The word "bulldozer" refers only to a motorized unit fitted with a blade designed for pushing. The word is sometimes used inaccurately for other heavy equipment such as the generally similar front-end loader designed for carrying material rather than pushing it. The term originally referred only to the blade attachment but is now commonly applied to any crawler tractor with a front-mounted blade.