Excavator: 7 types and their use on construction sites

The chassis is one of the most important elements of any excavator. It affects the stability of the machine, its mobility and the ability to work in different conditions. In practice, you will most often encounter two basic categories: wheeled and tracked excavators. The choice between them should not be random. Each type has its own specifics and achieves the best results in different conditions.

Wheel excavators

Wheeled excavators for construction work are used mainly in cities and on projects where frequent movement between work sites is required. These machines reach speeds of around 30 to 40 km/h, so they can move on public roads on their own axis and can drive on paved roads without the need to load onto a semi-trailer or low-loader.

Their advantage is high mobility, speed of movement and easy maneuvering. Therefore, they are often used in road construction and repair, building engineering networks or municipal works.

Crawler excavators

Crawler excavators are designed primarily for demanding conditions. Their chassis distributes the weight of the machine over a larger area, reducing ground pressure and improving stability.

You will appreciate the crawler excavator and its use especially in mud, on unpaved roads, slopes or during extensive earthworks. Compared to the wheeled version, it provides better traction and greater stability during digging.

The downside is less mobility and the need for transportation between sites. However, if a project is in one location for several weeks or months, a tracked chassis is often a more efficient choice.

Excavators can also be classified according to the way they perform excavation work. This parameter often determines whether a machine will be able to effectively perform a particular task.

Front-end excavators

Front-end excavators are designed to dig away from the machine. They are most commonly used in earth or rock mining where material needs to be removed above the level of the undercarriage.

The advantage is high productivity and the possibility of using larger buckets. These machines are often used on larger construction sites or in quarries.

Underground excavators

Backhoe loaders are among the most widely used machines in the construction industry . They work by moving the bucket towards the machine, which allows them to effectively create excavations below ground level.

They are used in the foundation of buildings, construction of sewers, water pipes or electrical distribution systems. Their versatility makes them the basic machine of most construction companies.

Excavators with grab

When handling bulk materials or in water management projects, excavators equipped with a grab are often used. Instead of a classic shovel, they use a special gripping device.

Such machines are used for handling gravel, sand or cleaning waterways. Their great advantage is the ability to reach even less accessible places and precisely manipulate the material.

In addition to common machines, there is also a group of specialized ones that are capable of working in very specific conditions.

Multi-bucket excavators operate with a chain of buckets that continuously extract material. They are most commonly found in open-pit mines, quarries, or large-scale industrial projects. Thanks to their continuous operation, they can process huge amounts of material in a short time.

Scrapers are used in cleaning the bottom of watercourses or reservoirs, in building flood control measures or in mountainous areas. Their construction is designed for difficult terrain, steep slopes or places where a classic chassis cannot move safely.

Large-sized crawler excavators then handle bulky earthworks in the mining industry, where the capacity of a regular construction machine is insufficient. These types are practically not used in regular construction of a family house or in landscaping a garden.

Large construction machines are not always the best solution. For smaller projects, compactness, easy handling and the ability to work in confined spaces are often crucial.

Mini excavator for excavation work - from battery-powered to powerful models

A mini excavator for excavation work is one of the most commonly rented machines for smaller construction projects. It is used for the implementation of connections, drainage systems, irrigation, swimming pools or fence foundations.

This category of machines, weighing from 1 to 6 tons, has gained immense popularity. A standard 5-ton mini excavator for excavation work can, under favorable conditions, excavate approximately 20 m³ of soil per day, which would take several workers a whole week to do manually.

If you need more power, mini excavators weighing 7.6 to 10 tons are a good choice. Such machines reach a digging depth of up to 4.5 meters and a working radius of more than 7 meters. They are used in the construction of utility networks, drainage, terrain modeling or more demanding earthworks.

Battery-powered models are also becoming increasingly popular. A battery-powered mini excavator operates without exhaust fumes and with significantly lower noise levels. Therefore, it is suitable for work in city centers, closed areas or near residential areas.

Imagine that you need to dig trenches for an irrigation system in an already finished garden. A classic large machine would damage the lawn and would not be able to get through a narrow gate. However, a compact mini excavator can pass through even the most confined spaces and perform the necessary excavation without extensive interference with the surrounding area.

Backhoe loader – double function in one machine

Backhoe loaders are among the most versatile construction machines. They have a loading bucket at the front and an excavator arm at the rear.

This means that one machine can handle digging, loading, moving material and simple landscaping. Digging depth exceeds 4 meters, which is sufficient for most common construction tasks.

Another advantage is the possibility of independent movement on public roads. For shorter distances, there is no need to arrange special transport.

Choosing the right excavator depends on three things: the size of the work area, the depth and volume of the excavation, and the type of terrain you will be working in. For a small garden or renovation in a narrow alley, go for a mini excavator, while for larger earthworks on a construction site, a medium or larger tracked excavator is worth it. If you need the machine to do both digging and loading and will be moving it between multiple locations, a backhoe loader or wheeled excavator will save time and transportation costs.

For a quicker reference, the following table compares the basic parameters of the most common categories of excavators you can rent:

Each type of excavator has its own advantages and limitations, which are worth knowing before you order the machine:

• Crawler excavator - high stability and traction in the terrain, slower movement over longer distances.
• Wheeled excavator - fast movement on roads, lower stability in soft terrain.
• Mini excavator - can also pass through narrow spaces, but has limited excavation depth and volume.
• Backhoe loader - two functions in one machine, but in extremely confined spaces it is less maneuverable than a mini excavator.

Every excavator has its strengths and weaknesses, which is why there is no one-size-fits-all solution for all projects.

Wheeled excavators excel in mobility and ease of movement between construction sites. However, they can lose stability on loose ground.

Crawler excavators offer excellent traction and stability. The downside can be more difficult transportation and higher operating costs.

Mini excavators allow you to work in confined spaces, but their performance may not be sufficient for large volumes of soil.

Backhoe loaders provide high versatility, but for specialized tasks they do not reach the efficiency of separate machines designed exclusively for digging or loading.

Many construction companies and private investors today prefer renting rather than buying equipment. The reason is simple. You only use the excavator during the project, but the responsibility for service, storage, and maintenance remains with the lessor.

Renting construction excavators allows you to choose exactly the machine you need. You can choose a mini excavator for small excavations, a wheeled excavator for roads, and a tracked machine for difficult terrain.

The rental may include transportation of the equipment to the site, professional handover of the machine and operator instruction. Service support is also available during the rental, which minimizes the risk of work interruptions.

The advantage is the flexible rental period. You can rent the equipment for one day, a week or several months depending on the needs of the project. Thanks to branches throughout Slovakia , the availability of machines is easy and the reservation can be processed quickly and without unnecessary administration.

An excavator is not one universal machine, but a whole family of machines – from a one-ton mini excavator to a seventeen-ton wheeled model – and each of them is suitable for a different type of work. Choose the right one on the construction site or in the garden.