What Size Kubota Mini Excavator Do I Need? KX & U Series Guide

At the top of the KX lineup is the KX080-5.

It produces 66.6 gross horsepower, has a published operating weight of 18,365 pounds in Kubota's cab-and-rubber-track configuration, and provides a maximum digging depth of 15 feet 1.1 inches.

Kubota lists a 14,660-pound bucket breakout force for the KX080-5.

This is the machine to start considering when you're moving into more demanding commercial excavation and construction applications.

Kubota U Series Models Explained

The U Series takes a different approach.

Instead of simply increasing machine size, Kubota designed the lineup around the ability to work effectively in confined spaces.

U10-5

The U10-5 produces 10.3 gross horsepower and has a published operating weight of 2,646 pounds.

It has just 0.6 inches of rear swing clearance and a maximum digging depth of 5 feet 11 inches.

The U10-5 also has a variable-width track frame that can retract to help it fit through narrow gates and other restricted access points.

Consider the U10-5 for:

U17-5

The U17-5 is one of the most interesting machines in the lineup for tight-access work.

It produces 17.0 gross horsepower, weighs 3,702 pounds in Kubota's published configuration, and has 0 inches of rear swing clearance.

Maximum digging depth is 7 feet 5.9 inches.

That combination makes the U17-5 especially useful when you need to work close to structures while still having more capability than the smallest excavators.

U27-4

The U27-4 produces 20.8 gross horsepower and has a published operating weight of 5,688 pounds.

It provides 9 feet 5 inches of digging depth and only 1.6 inches of rear swing clearance.

The U27-4 may make sense for:

U35-4

The U35-4 produces 23.9 gross horsepower and has a published operating weight of 8,129 pounds.

It provides 9 feet 8.9 inches of digging depth and only 2 inches of rear swing clearance.

The U35-4 is also one of the U Series models available with an optional cab, giving contractors another option for year-round operation.

U48-5

The U48-5 moves into the larger end of the U Series.

It produces 40.4 gross horsepower and has a published operating weight of 10,848 pounds.

It provides 10 feet 8 inches of maximum digging depth while maintaining just 1.2 inches of rear swing clearance.

The U48-5 can be an attractive option for contractors who need substantial excavation capability but still regularly work in areas where rear clearance matters.

U55-5

The U55-5 is the largest U Series excavator in the lineup.

It produces 47.6 gross horsepower, weighs 12,247 pounds in Kubota's published configuration, and provides 11 feet 11 inches of maximum digging depth.

Its rear swing clearance is only 2.5 inches.

The U55-5 gives contractors a way to move into a larger excavator while maintaining the tight-tail-swing advantages of the U Series.

What Size Kubota Excavator Do I Need for Landscaping?

Landscaping is one of the best examples of why there isn't one answer to the question.

A contractor installing drainage and landscaping around residential homes may need a very different machine from a commercial contractor preparing large properties.

For smaller landscaping jobs, consider machines such as:

For general landscaping and excavation, look at:

For larger landscaping projects, consider:

The key is matching the machine to the work rather than choosing based only on horsepower.

What Size Kubota Excavator Do I Need for Drainage?

Drainage work often requires a combination of digging depth and maneuverability.

Before choosing a machine, consider:

For residential drainage, smaller KX and U Series excavators may provide the access you need.

For larger commercial drainage projects, stepping up into machines such as the KX040-5, U48-5, U55-5, KX057-5, or KX080-5 may make more sense.

What Size Kubota Excavator Do I Need for Utility Work?

Utility contractors often have to work around existing infrastructure.

That can make machine width and rear swing clearance extremely important.

If you're installing utilities in residential areas, a U Series excavator may provide an advantage because of its tight- or zero-tail-swing design.

If you're working primarily on larger, open construction sites, a KX Series machine may be a better fit.

Think about the job site first.

Then choose the machine.

How Deep Do You Need to Dig?

Digging depth is one of the most important specifications to consider.

If your typical trench is only a few feet deep, you may not need a large excavator.

If you're regularly digging deeper utility trenches, foundations, drainage systems, or other excavations, you'll want to make sure the machine has enough digging depth to handle the work.

For example, the K008-5 has a maximum digging depth of 5 feet 8 inches, while the KX080-5 reaches 15 feet 1.1 inches.

That's a substantial difference.

Don't buy an excavator based only on horsepower or operating weight. Make sure it can physically reach the depth your jobs require.

How Much Does the Excavator Weigh?

Operating weight matters for several reasons.

First, a heavier excavator generally provides a different level of stability and lifting capability than a smaller machine.

Second, you have to transport it.

Before buying an excavator, make sure you understand:

For example, the K008-5 weighs 2,315 pounds in Kubota's published configuration, while the KX080-5 is listed at 18,365 pounds in its cab-and-rubber-track configuration.

That's a huge difference in transportation requirements.

What About Excavator Attachments?

Attachments can turn a compact excavator into a much more versatile tool.

Kubota offers performance-matched attachments and accessories for its KX and U Series excavators, including:

Think about the attachments you'll actually use before choosing your excavator.

For example, if you need a hydraulic thumb, breaker, or auger, make sure the excavator has the hydraulic capability and attachment compatibility required for the tool.

Kubota specifically offers attachments designed to work with its excavators to help ensure component compatibility.

Don't Automatically Buy the Biggest Excavator

Bigger isn't always better.

A larger excavator gives you more capability, but it also requires more room, more transportation capacity, and potentially more cost to operate.

If most of your work involves residential yards and tight-access projects, a smaller U Series machine could actually make you more productive because you can get it into places where a larger excavator can't.

The best excavator is the one that comfortably handles the work you actually perform.

Don't Buy Too Small Either

The opposite mistake can cost you money.

If you regularly ask a small excavator to do work that's better suited to a larger machine, you may spend more time on each job and limit the work you can take on.

You may also find yourself renting additional equipment when your own machine doesn't have enough digging depth, lifting capability, hydraulic performance, or reach.

If your business is growing, look at the work you're doing today — and the work you expect to be doing next year.

KX Series or U Series: Which One Is Right for Me?

Here's a simple way to think about it.

A KX Series Excavator May Be a Better Fit If:

A U Series Excavator May Be a Better Fit If:

Neither series is automatically better.

The job determines which machine makes the most sense.

Should I Buy or Rent a Kubota Mini Excavator?

If you only need an excavator occasionally, renting may make sense.

If excavation is a regular part of your business, owning the right machine can provide consistent access to equipment and help you avoid depending on rental availability.

Consider:

If you use an excavator every week, choosing the right machine becomes much more important than if you only need one a few times a year.

How to Choose the Right Kubota Mini Excavator Size

Before you choose a machine, answer these questions:

1. What will you use it for?

Digging, trenching, drainage, landscaping, grading, utility work, construction, or something else?

2. How deep do you need to dig?

Compare your typical digging depth to the machine's maximum digging depth.

3. How much room do you have?

Measure gates, driveways, buildings, fences, and other access points.

4. Do you need zero- or tight-tail swing?

If you're working close to buildings or other obstacles, this could be one of the most important factors.

5. What attachments will you use?

Make sure the machine can operate the attachments your work requires.

6. How will you transport it?

Check the excavator's operating weight, trailer capacity, tow vehicle capacity, and attachment weight.

7. How often will you use it?

A machine used every day should be selected differently from one used occasionally.

8. What work do you expect to be doing in the future?

Don't just choose a machine for today's smallest job.

Think about where your business is going.

Sink Farm Equipment Can Help You Choose the Right Kubota Excavator

Choosing the right excavator isn't just about looking at horsepower or operating weight.

It's about matching the machine to the work.

At Sink Farm Equipment, we help contractors, landscapers, farmers, rental businesses, municipalities, and property owners throughout the Lexington, NC area compare Kubota equipment and find the machine that fits the job.

Whether you're considering a K008-5, KX018-4, KX030-4, KX033-4, KX040-5, KX057-5, KX080-5, U10-5, U17-5, U27-4, U35-4, U48-5, or U55-5, the right choice depends on your work, your job site, and the capabilities you actually need.

If you're not sure which excavator size makes sense, talk with our team before you buy.

We'll help you compare the options and determine which Kubota excavator fits your work.

Frequently Asked Questions

What Is the Smallest Kubota Mini Excavator?

The K008-5 is the smallest model in Kubota's KX Series. The U10-5 is the smallest model in the U Series. Both have 10.3 gross horsepower, although the U10-5 has a slightly higher published operating weight and less rear swing clearance.

What Is the Largest Kubota Mini Excavator?

The KX080-5 is the largest model in Kubota's KX Series. It produces 66.6 gross horsepower, weighs 18,365 pounds in Kubota's published cab-and-rubber-track configuration, and has a maximum digging depth of 15 feet 1.1 inches.

What Is the Difference Between the Kubota KX and U Series?

The KX Series uses a standard-tail-swing design, while the U Series is designed around zero- and tight-tail-swing operation for working in confined areas.

Which Kubota Excavator Has Zero Tail Swing?

The U17-5 has 0 inches of rear swing clearance in Kubota's specifications and is identified as a zero-tail-swing model.

What Kubota Excavator Is Best for Tight Spaces?

There isn't one answer for every job. Smaller U Series models such as the U10-5 and U17-5 are designed for very tight work areas, while larger U Series models provide more excavation capability while maintaining very low rear swing clearance.

What Kubota Excavator Is Best for Construction?

It depends on the type of construction work. Smaller machines can be excellent for residential construction and tight-access jobs, while larger machines such as the KX057-5, U55-5, and KX080-5 provide more capability for demanding excavation and commercial construction work.

How Deep Can a Kubota Mini Excavator Dig?

Kubota's lineup ranges from a maximum digging depth of 5 feet 8 inches on the K008-5 to 15 feet 1.1 inches on the KX080-5.

How Much Does a Kubota Mini Excavator Weigh?

It depends on the model. Kubota's published operating weights range from 2,315 pounds for the K008-5 to 18,365 pounds for the KX080-5 in the specified configurations.

What Should I Consider When Choosing an Excavator Size?

Start with your job. Consider digging depth, operating weight, available work space, rear swing clearance, attachments, transportation requirements, and how frequently you'll use the machine.

Find the Right Kubota Mini Excavator for Your Job

There isn't one Kubota excavator that's right for everybody.

A landscaper working through a residential gate may need something completely different from a commercial contractor excavating a large construction site.

That's why Kubota offers such a broad range of KX and U Series excavators.

The best way to choose is to start with the work you need to accomplish and then find the machine that provides the right combination of size, power, digging depth, weight, and maneuverability.

If you're still trying to figure out what size Kubota mini excavator you need, Sink Farm Equipment can help.

Serving contractors, landscapers, farmers, municipalities, rental businesses, and property owners throughout the Lexington, NC area.