A bulldozer is a plant machine mounted on tracks with a large blade (metal plate) attached to it, allowing it to push large quantities of matter during construction, earthworks and quarrying projects. ... Wide tracks help distribute the bulldozer's weight over a large area preventing it from sinking in softer grounds.
Bulldozers are often used in road building, construction, mining, forestry, land clearing, infrastructure development and any other projects requiring highly mobile, powerful and stable earth-moving equipment.
Bulldozer blades come in various forms dependent on the type of project they will be used on:
Straight Blade (‘S’ Blade):
Short with no lateral curve or side wings. Typically used for grading.
Universal Blade (‘U’ Blade):
Tall, very curved with large side wings enabling it to carry more matter.
Combination Blade (‘S-U’ Blade):
Shorter with a slight curve and smaller side wings. Typically used for pushing large rocks in quarrying.
There are two different blade movements available; PAT blades and 6-way blades which you can learn more about here.
Bulldozers commonly have a device at the rear of the machine known as a ‘ripper’. The ripper turns and loosens densely compacted material. It is a long, claw-like attachment on the back of the bulldozer. Rippers can come as a single (single shank) or in groups of two or more (multi-shank). Usually, a single shank is preferred for heavy duty projects. Ripping breaks the surface rock or pavement into small rubble which is easy to handle and transport. This can then be removed so that grading can take place.
Bulldozers can be found on a wide range of construction sites, engineering projects, mines and quarries.
Another type of bulldozer is the wheeled bulldozer. They generally have four wheels and are driven by a 4-wheel drive system and have a hydraulic steering system. The blade on a wheeled bulldozer is mounted forward of the articulation joint and is hydraulically triggered.