Looking for a Cordless Circular Saw That Can Handle Real DIY Work?
A good circular saw can completely change how quickly you tackle woodworking, remodeling, construction, and home-improvement projects. But choosing one isn't simply about finding the saw with the biggest motor or the longest feature list.
You want something powerful enough for common cutting jobs, comfortable enough to control, versatile enough for different angles, and convenient enough that you actually want to use it.
That's where the DEWALT 20V MAX Circular Saw DCS391B comes into consideration.
This cordless sidewinder-style saw combines a 6-1/2-inch carbide-tipped blade with a 5,150 RPM motor and a 0–50° bevel capacity. It is also part of DEWALT's 20V MAX battery platform, making it particularly appealing to people who already own compatible DEWALT batteries.
But is the DCS391B still a smart buy?
Let's take a closer look at its features, practical advantages, limitations, and the type of user who should consider it.
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Quick Verdict: Is the DEWALT DCS391B Worth Buying?
Yes, the DEWALT DCS391B is worth considering if you want a straightforward cordless circular saw for DIY, woodworking, renovation, and general construction tasks.
Its biggest advantages are its 5,150 RPM motor, 6-1/2-inch carbide-tipped blade, lightweight design, comfortable grip, and 0–50° bevel range.
However, there is one important consideration: this is the bare-tool version.
DEWALT specifies that the DCS391B does not include a battery or charger.
That makes it more attractive for existing DEWALT 20V MAX users who already have batteries, while first-time buyers need to budget for a compatible battery and charger.
What Is the DEWALT 20V MAX Circular Saw DCS391B?
The DCS391B is a cordless 20V MAX circular saw designed for cutting wood and handling a variety of common construction and DIY applications.
DEWALT equips it with a 6-1/2-inch carbide-tipped blade and a motor capable of reaching 5,150 RPM. The saw also provides a 0–50° bevel capacity, allowing you to make angled cuts instead of being limited to straight 90-degree cuts.
The tool-only configuration includes:
DCS391 6-1/2-inch circular saw
6-1/2-inch carbide-tipped blade
The battery and charger are sold separately.
For someone already invested in the DEWALT 20V MAX system, this can be a major advantage because you don't necessarily need another battery and charger with every tool purchase.
Key Features of the DEWALT DCS391B
1. 5,150 RPM Motor
At the heart of the DCS391B is a motor rated at 5,150 RPM.
That speed is designed to provide the cutting performance needed for demanding applications while keeping the saw cordless and portable.
For DIY users, this can be useful when breaking down lumber, plywood, boards, and other wood materials.
The important thing isn't simply the RPM number, though. In practical use, the combination of motor power, blade selection, battery condition, material, and cutting technique all affect performance.
2. 6-1/2-Inch Carbide-Tipped Blade
The DCS391B comes with a 6-1/2-inch carbide-tipped blade.
DEWALT specifically states that the blade is designed for cutting material at both 90° and 45° angles.
A carbide-tipped blade is useful because it provides a practical cutting solution straight out of the box, although experienced users may eventually choose different blades depending on whether they're cutting framing lumber, plywood, trim, or other materials.
For the average DIY project, having the correct blade for the material can make a noticeable difference in cut quality and efficiency.
3. 0–50° Bevel Capacity
One of the most useful features of this DEWALT 20V MAX Circular Saw is its bevel range.
The DCS391B can be adjusted from 0° to 50°, giving you considerably more flexibility than a saw restricted to straight cuts.
This is useful for projects involving:
Angled cuts
Roof and framing work
Custom woodworking
Trim and renovation projects
Beveled edges
DIY furniture projects
The included manual also explains that bevel cutting requires additional attention because the blade has more surface area in the material, increasing the potential for binding or misalignment.
So the bevel feature adds versatility, but it should always be used with proper cutting technique.
Lightweight Magnesium Shoe for Better Control
Another notable part of the DCS391B is its high-strength, lightweight magnesium shoe.
DEWALT describes the shoe as being designed for jobsite durability and long-term cut accuracy.
For a circular saw, the shoe is important because it rides against the surface of the material as you make your cut.
A stable shoe can make it easier to maintain consistent contact with the workpiece, particularly when you're making longer cuts.
This is especially useful for DIYers who may not have access to larger stationary cutting equipment.
Comfortable Rubber Over molded Grip
Power is only useful if you can control the tool.
DEWALT gives the DCS391B a rubber over molded comfort grip intended to improve balance and control.
That's a practical feature when you're working through several cuts during the same project.
Imagine you're building a simple workbench. Instead of measuring and cutting one board at a time with a corded saw, you can move around the workspace with the cordless DCS391B and make your cuts without managing a power cord.
That freedom can make smaller projects feel considerably less cumbersome.
What Can You Use the DEWALT DCS391B For?
The DCS391B can make sense for a wide range of everyday cutting jobs.
DIY Home Projects
If you're building shelves, benches, simple furniture, storage solutions, or other wood projects, a circular saw can quickly become one of your most useful power tools.
The cordless design is particularly convenient when you're working somewhere without easy access to an outlet.
Remodeling
For renovation work, you may need to cut boards, panels, or other wood materials in different areas of a home.
A cordless saw eliminates the need to continually route an extension cord through the workspace.
Construction and Framing
The 6-1/2-inch blade and 5,150 RPM motor give the DCS391B the basic characteristics needed for many common wood-cutting tasks.
However, professionals working with particularly demanding materials or requiring maximum cutting capacity may want to compare it with larger or newer brushless circular saws.
Outdoor Projects
Building a deck, garden structure, outdoor bench, or other wood project often means working away from a convenient electrical outlet.
A cordless circular saw can be particularly useful in these situations.
A Real-World Example: Building a Simple Workbench
Imagine you're building a workbench from dimensional lumber and plywood.
You need to:
Measure the boards.
Mark your cut lines.
Secure the material.
Set the appropriate cutting depth.
Make straight cuts.
Make angled cuts where required.
Repeat the process for multiple pieces.
With a corded saw, you're also thinking about where the cable is running.
With the DEWALT DCS391B, an existing compatible battery lets you move around the workspace without that cord.
The 0–50° bevel adjustment also gives you the flexibility to make angled cuts when your project calls for them.
The key point is that the DCS391B isn't trying to replace every saw in a professional workshop. Instead, it offers a practical combination of portability, cutting speed, and versatility for users who want a capable cordless circular saw.
One Important Buying Consideration: Battery Not Included
This is probably the biggest thing to understand before purchasing the DCS391B.
The DCS391B is sold as a tool only.
DEWALT explicitly states that the battery and charger are sold separately.
If you're already using DEWALT 20V MAX tools, this may actually be an advantage.
You can use the compatible battery you already own instead of paying for another charger and battery.
But if you're new to the DEWALT 20V MAX platform, remember to calculate the cost of the battery and charger when deciding whether this saw represents good value.
DEWALT also sells a DCS391P1 kit that includes the saw, a 20V MAX 5.0Ah battery, and charger.
DCS391B vs. a Newer Brushless DEWALT Circular Saw
This is where your buying decision becomes more interesting.
The DCS391B is a traditional 20V MAX circular saw, while DEWALT's newer lineup includes brushless models such as the DCS565B.
The DCS565B, for example, is a 20V MAX XR 6-1/2-inch brushless circular saw with a 4,950 RPM motor, 0–50° bevel capability, and features including an LED and rafter hook.
That doesn't automatically make the DCS391B a bad purchase.
Instead, think about what you actually need.
Choose the DCS391B if:
You already own DEWALT 20V MAX batteries.
You want a straightforward cordless circular saw.
You're mainly doing DIY or general home projects.
You want 0–50° bevel capability.
You don't necessarily need the latest brushless features.
Consider a newer brushless model if:
You're buying a professional-grade setup.
You want newer tool features.
You're looking for maximum efficiency from a modern cordless platform.
The price difference is small enough to justify upgrading.
The best choice depends heavily on your existing tools and intended workload.
Pros and Cons of the DEWALT DCS391B
Pros
20V MAX cordless convenience
5,150 RPM motor
6-1/2-inch carbide-tipped blade
0–50° bevel capacity
Lightweight magnesium shoe
Rubber over molded grip
Useful for DIY, woodworking and construction
Compatible with the DEWALT 20V MAX platform
3-year limited warranty
1-year free service
90-day satisfaction guarantee
Cons
Battery and charger are not included
It isn't a newer brushless design
Users starting a DEWALT battery platform may face additional battery costs
Professional users may prefer newer or larger DEWALT circular saw models
Is the DEWALT 20V MAX Circular Saw Good for Beginners?
For a beginner who understands basic power-tool safety, the DCS391B can be a practical circular saw to consider.
Its controls are relatively straightforward, and the cordless design makes it convenient to move around.
However, a circular saw is still a powerful cutting tool.
Beginners should always read the manufacturer's instructions, secure the material properly, use appropriate personal protective equipment, and keep hands away from the blade path.
DEWALT's manual also emphasizes correct cutting depth and warns about conditions that can contribute to binding and kickback.
So while the DCS391B can be beginner-friendly in terms of its basic operation, it should never be treated as a casual or risk-free tool.
Who Should Buy the DEWALT DCS391B?
The DCS391B makes the most sense for several types of buyers.
DIY homeowners:
If you regularly build, repair, or renovate things around your home, a cordless circular saw can be extremely useful.
Woodworkers:
For general wood-cutting tasks, the 6-1/2-inch blade and bevel adjustment provide useful versatility.
DEWALT 20V MAX users:
This may be the strongest reason to consider it. If you already have compatible batteries, buying the tool-only version can make more sense.
Remodelers and handymen:
The cordless format makes it easier to move between work areas without dealing with an extension cord.
Who May Want a Different Circular Saw?
The DCS391B may not be the ideal choice for everyone.
If you're a professional contractor who spends every day making demanding cuts, you may prefer a newer brushless model with additional features.
Likewise, if you don't own any DEWALT 20V MAX batteries, compare the total cost of the saw plus battery and charger against competing kits.
And if you frequently need deeper cuts, a larger 7-1/4-inch circular saw may be worth considering.
The right tool isn't necessarily the most powerful one—it's the one that fits your projects, battery ecosystem, budget, and workload.
Final Verdict: Is the DEWALT DCS391B Worth Buying?
The DEWALT 20V MAX Circular Saw DCS391B remains an appealing option for DIYers, homeowners, woodworkers, and DEWALT users who want a portable cordless circular saw.
Its 5,150 RPM motor, 6-1/2-inch carbide-tipped blade, 0–50° bevel capacity, lightweight magnesium shoe, and rubberized grip give it a useful combination of speed, versatility, and control.
The biggest advantage is arguably its place in the DEWALT 20V MAX ecosystem. If you already own compatible batteries, the tool-only format can be convenient and potentially more economical.
On the other hand, buyers starting from scratch should factor in the additional battery and charger cost. And if you're specifically looking for the newest brushless technology, it's worth comparing the DCS391B with newer DEWALT models before making your final decision.
Overall, the DCS391B is worth considering when you want a proven, straightforward cordless circular saw for everyday DIY, woodworking, remodeling, and general cutting tasks.
Ready to Upgrade Your Cutting Setup?
If the features match what you're looking for, now is a good time to check the current listing and see whether the DEWALT 20V MAX Circular Saw DCS391B fits your tool collection.
Get the DEWALT 20V MAX Circular Saw DCS391B on Amazon to check the latest price, availability, customer reviews, and purchasing options before you decide.
For DEWALT 20V MAX users who already have compatible batteries, this tool-only circular saw can be an especially convenient addition to an existing power-tool collection.
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Frequently Asked Questions
Does the DEWALT DCS391B come with a battery?
No. The DCS391B is a tool-only model, so the battery and charger are sold separately.
What size blade does the DCS391B use?
The saw uses a 6-1/2-inch carbide-tipped blade.
How fast is the DEWALT DCS391B?
DEWALT rates the motor at 5,150 RPM.
Can the DCS391B make bevel cuts?
Yes. The DCS391B has a 0–50° bevel capacity, allowing angled cuts within that range.
Is the DCS391B part of the DEWALT 20V MAX system?
Yes. It is a 20V MAX cordless tool and is designed for use with compatible DEWALT 20V MAX batteries.
Does DEWALT offer a version with a battery and charger?
Yes. DEWALT lists the DCS391P1 kit, which includes the DCS391 saw, a 20V MAX 5.0Ah battery, and charger.
Is the DCS391B brushless?
No. The DCS391B is not marketed as a brushless model. DEWALT's newer DCS565B, for example, is specifically identified as a 20V MAX XR brushless circular saw.
Is the DEWALT DCS391B good for DIY projects?
It can be a strong option for DIY woodworking, remodeling, construction, and general wood-cutting applications, particularly for users already invested in the DEWALT 20V MAX battery platform.
Purchase link: Get the DEWALT 20V MAX Circular Saw DCS391B on Amazon
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