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Your complete guide to buying a stump grinder

Tree stumps and tree roots will be no problem with a machine properly built to grind stumps

Complete tree removal requires more than just cutting down the tree.

If not properly removed, the remaining tree stumps can be an eyesore, take up valuable space on your property and even lead to unwanted new tree growth. A stump grinder is an essential piece of equipment for any landowner serious about effective stump removal and long-term property maintenance.

In this comprehensive guide, we discuss the operations of stump grinders, what features to look out for, and see what are the options for stump grinders from Woodland Mills.

Understanding PTO stump grinders

PTO (Power Take-Off) driven stump grinders are the gold standard in stump removal equipment for landowners with tractors. That's why Woodland Mills offers only PTO stump grinders. They efficiently harness your tractor's power for grinding stumps of all sizes, making them a practical investment for property maintenance. At the heart of every PTO stump grinder is a carefully engineered system designed for maximum efficiency. The key components include:

Solid steel grinding flywheel: The large-diameter, dynamically balanced flywheel is the backbone of the grinding operation. This heavy-duty component ensures smooth operation and consistent performance, even when tackling the toughest stumps.

Tungsten carbide teeth: These specially-designed cutting teeth are the workhorses of the stump grinder. The teeth rotate and cut through wood gradually reducing the stump to chips. They're engineered to maintain their sharp edge through countless hours of grinding.

When the flywheel is powered and drawn through the stump, the solid steel grinder chews up the wood one piece at a time, turning it into wood chips. The stump grinder is then repeatedly drawn through the stump, as well as the roots, until there's only a hole in the ground left.

Stump grinders can be an important tool on any tree care job site, and can turn even a large stump into nothing in just minutes.

Benefits for landowners

PTO stump grinders are rugged machines that offer several distinct advantages that make them particularly suitable for property owners:

Versatility: By utilizing your existing tractor's power, they eliminate the need for a separate engine, reducing maintenance requirements and initial investment.

Deep grinding capability: The robust design allows for grinding stumps well below ground level, ensuring complete removal and preventing regrowth.

Cost-effective operation: Since they run off your tractor's power, you're not paying for additional fuel or maintaining a separate motor.

Durability: Built with heavy-duty components, PTO grinders are designed to withstand regular use and challenging conditions.

A close-up of a Woodland Mills WG24 Stump Grinder removing a tree stump.

Factors to consider when buying a stump grinder

When investing in a stump grinder, several key factors will influence which model best suits your needs. The following essential considerations will help you make an informed decision.

Capacity

Each model of stump grinder features a maximum grinding depth, which determines how far down into the ground the machine will dig. Because you want to dig deep enough to not just get rid of the stump, but the root system as well, you'll want to select a model that features the best grinding efficiency and depth capabilities for getting rid of your stumps.

Most stump grinders can tackle a stump 20-30 inches in diameter, but if you have enough time and patience, you can go back and forth and grind just about any stump into dust.

The landscape is also a factor, as a bit of extra grinding depth can help to eliminate stumps on level ground, slopes or uneven terrain.

Quantity

A portable PTO stump grinder can eliminate as many stumps as you want, able to turn a field of former trees into a clean terrain where you can easily landscape it.

The biggest key factor for the number of stumps you can grind is time, because each stump may take 10-15 minutes. If a stump is especially large or has a deep root system, then it may take a few more minutes. A larger stump grinder driven by more horsepower will help to get rid of stumps faster.

So you'll want to pick the best stump grinder than is equipped for your tractor's PTO which will help you to deal with multiple stumps quickly.

Tractor requirements and compatibility

Your tractor's specifications will determine which grinder models are suitable:

PTO horsepower requirements: Match the grinder to your tractor's capabilities

Hydraulic system compatibility: Some models require specific hydraulic specifications

Lift capacity: Consider your tractor's ability to safely handle the grinder's weight

Essential features to Look For

When evaluating different stump grinder models, certain features can make the difference between a good investment and a great one.

Cutting mechanism and teeth quality

Great stump grinders have features like:

    • Strong tungsten carbide teeth that won't easily chip or dull

    • The ability to replace or sharpen damaged teeth

    • Dynamically balanced wheels to reduce vibration and increase efficiency

    • Strategic tooth pattern placement for the best cutting performance

Bonus features

Other important, but not strictly necessary, features include:

    • Shock absorption, to reduce vibration and increase the machine's focus on cutting

    • Chip deflectors, to help avoid wood chips flying around while you're grinding

    • Higher cutting depth, to dig deeper and get those hard-to-get roots out

Steps before starting stump grinding

Proper operation ensures both safety, productivity and efficiency while extending the life of your equipment.

Learning proper techniques are essential, and regular maintenance ensures optimal performance and longevity. Here are some basic operation principles:

Site preparation

    • Clear the area around the stump

    • Mark underground utilities

    • Remove rocks and debris

    • Position tractor and grinder appropriately

Grinding technique

    • Start with outer edges

    • Work in systematic patterns

    • Maintain consistent depth

    • Monitor machine performance

Routine checks

    • Inspect teeth for wear or damage

    • Check all bolts and fasteners

    • Clean debris from moving parts

Periodic maintenance

    • Grease fittings according to schedule

    • Replace or sharpen worn teeth

    • Inspect bearings and seals

A Woodland Mills WG28 PRO Stump Grinder on forest floor with fallen leaves and sawdust.

Frequently asked questions

Is a stump grinder worth the investment?

We usually recommend going with the biggest stump grdinder your tractor can handle. Start by checking the horsepower at your tractor’s PTO and the lift capacity, then match it up with the compatible stump grinder models.

What are the benefits of a Pro stump grinder over the base model?

The base models are a no-frills, entry-level option, giving you solid, reliable stump grinding at a great price. Simple, tough, and ready to get the job done.

Our PRO models come with extra features to make grinding smoother and more efficient. That includes our patent-pending shock absorption system, which keeps steady and consistent pressure to deliver smoother, more controlled stump grinding. We’ve also added a go/no-go visual indicator to help you manage your tractor speed while you grind. It’s technology you won’t find anywhere else, and we think it’s a big step forward in making stump grinding easier, more efficient and with performance in mind.

How quickly can a stump grinder remove stumps?

That’s a tricky one, because it really depends on the stump. But generally speaking, you’re looking at minutes, not hours.

Things like stump size, height, and how dry or seasoned the wood is all play a role. That said, our stump grinders are built to work fast, and in most cases, you can expect to finish a stump in around 15 minutes or less.

Do stump grinders arrive assembled? If not, how long does it take?

When your stump grinder is delivered, it will be almost fully assembled. We have invested alot of time in creating easy to follow manuals to ensure the instructions don't leave you scratching your head. It should take about an hour or two to complete the final stages of assembly. A printed copy of your manual is included in the crate and can also be viewed in PDF format here.