An excavator is a commonly used engineering vehicle that is often times referred to simply enough as a digger. There are many different types of excavators in use today. All excavators consist of a cab and bucket situated on a rotating pivot, as well an articulated arm which does most of the work. The undercarriage of an excavator consists of either wheels or a track.

While most excavators look similar, there are a variety of models in use and on the market for purchase. The smaller units are often times referred to as compact or mini excavators. They usually weigh in at approximately 3,240 pounds with a track width adjustment of roughly 35 inches. On the other side of the industry, there are excavators that weigh nearly 190,000 pounds. These have a bucket size of 5.9 yd³ whereas the smaller models feature a much smaller setup of 0.048 yd³. Of course, there are many models that are slotted between the biggest and smallest; they are usually the most popular.

An excavator can be used in many ways. For this reason, they are seen all over the world taking on a variety of tasks. Some of the most common uses of excavators include: mining, digging foundations for homes, digging holes, relocating heavy material, basic demolition, basic landscaping, and river dredging.

The type of job determines the size of the excavator that is used. For instance, excavators used for mining are sure to be more powerful than those for basic landscaping duties.