An excavator is a must on your job site when you need to lift heavy amounts of soil. Excavators are popular earthmoving vehicles that feature a bucket, arm, rotating cab and movable tracks. These components provide superior digging power and mobility, allowing this heavy equipment to perform a variety of functions, from digging trenches and breaking holes to lifting away waste and excavating mines.
- Crawler Excavators
- Wheeled Excavators
- Dragline Excavators
- Suction Excavators
- Skid Steer Excavators
- Long Reach Excavators
- Mini Excavators
What are excavators used for? Excavators are applied to a variety of contractor and industrial needs, including mining, road construction, building construction and demolitions.
There are many types ,smaller machines handle digging and drilling functions, while larger excavators have different tools for heavy-duty projects. When getting your excavator, you’ll want to consider its size and speed as well as working conditions on the job site, such as the amount of space and the soil types.
The most common excavator types are crawler, dragline, suction, skid steer and long reach excavators. We’ll go over each type of excavator and the work each one is best used for.
These are the seven types of Excavators:
1. Crawler Excavators
Unlike other large excavators that run on wheels, crawlers run on two large endless tracks and are optimal for mining and heavy-duty construction jobs. Also known as compact excavators, these excavators use hydraulic power mechanisms to lift heavy debris and soil.
Their chain wheel system allows them to slide down and scale hills with less risk, making them suitable for grading hilly areas and landscaping uneven terrain. While slower than other excavators, crawlers provide greater balance, flexibility and stability overall.
Pros: Provide greater balance and stability on uneven ground
Cons: Slower than some other excavators
2. Wheeled Excavators
Wheeled excavators are similar in size and appearance to crawlers but run on wheels instead of tracks. Replacing tracks with wheels makes them faster and easier to maneuver on concrete, asphalt and other flat surfaces while still offering the same power capabilities.
Because wheels offer less stability on uneven ground than tracks, wheeled excavators are commonly used for roadwork and urban projects. However, operators can add outriggers to increase stability when transitioning between asphalt or concrete and an uneven surface.
Pros: Fast and easy to maneuver on flat surfaces
Cons: Perform poorly on uneven terrain
3. Dragline Excavators
The dragline excavator is a larger excavator that operates with a different process. The equipment utilizes a hoist rope system that attaches to a bucket via a hoist coupler. The other side of the bucket is affixed to a dragline that runs from the bucket to the cab. The hoist rope raises and lowers the bucket while the dragline pulls the bucket toward the driver.
Due to their weight, draglines are often assembled on-site. The unique system of this type of excavator is commonly used in large-scale civil engineering projects like canal dreading.
Pros: Dragline system is ideal for underwater excavating and canal dreading
Cons: Weight and size make it impractical for smaller jobs
4. Suction Excavators
Also known as vacuum excavators, suction excavators feature a suction pipe capable of providing up to 400 horsepower. The excavator first releases a water jet to loosen the ground.
The pipe, which contains sharp teeth at the edge, then creates a vacuum that carries away soil and debris up to 200 miles per hour.
A suction excavator is ideal for delicate underground applications, as it can reduce the chance of damage by more than 50 percent.
Pros: Added precision reduces damage during delicate jobs
Cons: Narrow suction pipes are impractical for large-scale applications
5. Skid Steer Excavators
Unlike standard excavators, skid steers have booms and buckets that face away from the driver. This orientation allows the attachments to reach over the cab instead of around it, making these excavators useful in more narrow areas and maneuvering tricky turns.
They are often used for digging pools, site cleaning, residential work and debris removal, where space is more limited and objects are spread far apart.
Pros: Easy to maneuver in tight and narrow spaces
Cons: Don’t perform as well on uneven or slippery surfaces
6. Long Reach Excavators
As its name suggests, a long reach excavator features a lengthier arm and boom sections. The design allows for better operation in hard-to-reach locations. The excavator’s extendable arm can reach over 100 feet horizontally.
These excavators are best used for demolition projects like structural crumbling and breaking down walls over bodies of water. Different attachments can be affixed to the arm to perform additional jobs such as shearing, crushing and cutting.
Pros: Longer boom is ideal for hard-to-reach locations and demolition projects
Cons: Difficult to use in tight spaces
7. Mini Excavators
In recent years, more contractors are using mini excavators, a smaller and lighter version of the standard excavator capable of minimizing ground damage and fitting through crowded, narrow sites like parking lots and indoor spaces. Also known as compact excavators, mini excavators typically incorporate reduced tail-swing or zero tail-swing to maneuver tighter turns and avoid contact with any obstacles.
Pros: Easily fits into tight spaces and can be used indoors
Cons: Can only handle smaller loads.
Sparrow Technical Services got you cover on any types of Excavators.
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