DEWALT DCS391B 20V MAX Circular Saw Review



In today’s world of DIY projects and home improvements, having the right tools at your disposal can make all the difference. I recently had the opportunity to test and review the DEWALT DCS391B 20V MAX Circular Saw, a versatile power tool designed for precision cutting and convenience.

As someone who frequently tackles woodworking and renovation tasks, I was eager to see how this circular saw would perform and whether it would live up to the reputation of DEWALT, a trusted brand in the realm of power tools.

DEWALT DCS391B 20V MAX Circular Saw

Design and Build Quality

Rugged Durability and Recognizable Design

When I first unboxed the DEWALT DCS391B 20V MAX Circular Saw, I was immediately struck by its rugged and durable appearance.

The signature bright yellow color, synonymous with DEWALT tools, is not only eye-catching but also serves as a visual cue for its quality craftsmanship. This distinctive color choice makes the tool instantly recognizable among a sea of other equipment.

Premium Materials for Longevity

The build quality of the circular saw is undeniably impressive. DEWALT has opted for a high-strength and lightweight magnesium shoe, a choice that not only contributes to the tool’s durability but also ensures accuracy in cuts over the long term.

This magnesium shoe not only withstands the rigors of demanding jobsites but also instills confidence in its ability to consistently deliver precise results.

Ergonomic Design for Enhanced Control

DEWALT has paid meticulous attention to the ergonomics of the DCS391B Circular Saw. The inclusion of a rubber overmolded comfort grip goes a long way in enhancing the user experience.

During operation, this grip feels comfortable and secure in hand, promoting better control and minimizing hand fatigue during extended use. This ergonomic design element is particularly beneficial when making intricate cuts or working on projects that require a high degree of precision.

Performance and Functionality

Power and Precision: The 5150 RPM Motor

Undoubtedly, one of the most notable features of the DEWALT DCS391B 20V MAX Circular Saw is its powerful 5150 RPM motor. This motor is the heart of the tool, driving its exceptional performance and enabling it to handle even the most demanding cutting tasks with ease.

Dewalt DCS391B performance

The motor’s high RPM translates into a swift and efficient cutting experience, allowing for quick work progress and reduced project completion times. Whether you’re dealing with hardwood, softwood, or other materials, the motor’s power ensures that the saw can handle the job effectively.

Effortless Cutting Through a Variety of Materials

In my tests, the circular saw lived up to its reputation by seamlessly slicing through a diverse range of materials. Wood, plywood, and other substrates were no match for the DCS391B’s cutting prowess.

The result?

Smooth and clean cuts that met the high standards expected from a DEWALT tool. This level of cutting precision is crucial for woodworking projects where accuracy is paramount, as it eliminates the need for extensive sanding or additional finishing work.

Versatility of the 6-1/2-Inch Carbide-Tipped Blade

The included 6-1/2-inch carbide-tipped blade further enhances the saw’s versatility. This blade is a true workhorse, capable of handling a variety of cutting tasks. Notably, it excels at both 90-degree and 45-degree cuts, providing flexibility in creating straight cuts or beveled edges.

This versatility is particularly valuable for projects that involve complex angles, such as crafting joints or creating custom trim pieces. Having a single blade that can tackle multiple cutting angles simplifies the workflow and saves valuable time.

Expanding Horizons with Bevel Cutting

The DCS391B’s 0-50 degree bevel capacity is a standout feature that adds a new dimension to the tool’s capabilities. This feature unlocks the ability to make bevel cuts, allowing for the creation of angled edges and joints.

Whether you’re working on decorative pieces, framing, or other applications that demand precise angles, this bevel capability proves invaluable. It broadens the range of projects that the circular saw can handle, making it a versatile addition to any toolkit.


  • Impressive Power: The 5150 RPM motor provides ample power for smooth and efficient cuts, even through tough materials.
  • Durable Build: The magnesium shoe ensures durability and accuracy, making it suitable for long-term use.
  • Comfortable Grip: The rubber overmolded comfort grip enhances control and reduces user fatigue during extended use.
  • Bevel Capability: The 0-50 degree bevel capacity opens up possibilities for a wide range of cutting angles and applications.
  • Versatile Blade: The 6-1/2-inch carbide-tipped blade can handle various cutting tasks and materials.


  • Battery Life: The powerful motor can drain the battery relatively quickly, especially when tackling demanding tasks.

Product Specifications

Voltage20 Volts
Blade Diameter6-1/2 inches
Motor RPM5150 RPM
Bevel Capacity0-50 degrees
Cutting Depth90°: 2-1/4 inches<br>45°: 1-5/8 inches
Blade MaterialHigh Speed Steel
Power SourceBattery Powered
Battery CompatibilityDEWALT 20V MAX Lithium-Ion
GripRubber Overmolded Comfort Grip
Weight7.1 pounds
Warranty3-Year Limited Warranty

Please note that specifications may vary slightly based on product updates or regional variations. Always refer to the manufacturer’s official documentation for the most accurate information.

DEWALT DCS391B 20V MAX Circular Saw Review

Value for Money

Considering the performance and features of the DEWALT DCS391B, its price point is justified. This circular saw offers a balance of power, precision, and durability, making it a valuable addition to any DIY enthusiast’s toolbox.

While the initial investment might be higher compared to some other options, the quality and performance you get in return make it a worthwhile choice for those who are serious about their projects.

User Reviews and Feedback

Looking at user reviews on Amazon, it’s evident that the DEWALT DCS391B has garnered positive feedback from a wide range of users. Many reviewers praise its power, accuracy, and ergonomic design.

The consensus seems to be that this circular saw delivers on its promises and meets the expectations set by the DEWALT brand.

DEWALT 20V MAX Circular Saw


Here’s a comparison between the DEWALT DCS391B and the CRAFTSMAN CMCS550B circular saws.

Blade Diameter6-1/2 inches7-1/4 inches
Power SourceBattery PoweredBattery Powered
Battery CompatibilityDEWALT 20V MAXCraftsman V20
MotorHigh-performance, 5150 RPMBrushless motor, 4700 RPM
Max Depth of Cut2-1/4 inches at 90°2-9/16 inches at 90°
Bevel Capacity50 degrees56 degrees with positive stops at 22.5 and 45
LED LightYesYes
Weight7.1 lbs8.82 lbs

Tips for Better Results

The DEWALT DCS391B Circular Saw is a powerful tool that can deliver exceptional cutting results when used correctly. To help you maximize its potential and achieve the best outcomes, here are five tips to consider:

  1. Choose the Right Blade: Select a blade suited for the material and task to ensure clean cuts without splintering. Keep the blade sharp and in good condition.
  2. Check and Adjust Depth: Set the blade depth slightly below the material’s surface for clean cuts. Test on scrap material before making the actual cut.
  3. Secure Material: Use clamps or guides to hold the material firmly in place, preventing shifting and uneven cuts.
  4. Follow the Marked Line: Guide the saw along your marked cutting line for accurate cuts. Use the built-in guide for alignment.
  5. Support the Workpiece: Provide continuous support, especially near the end of cuts, to prevent binding and kickback. Use sawhorses or benches for larger pieces and sacrificial plywood for sheet materials.


1. What is the maximum cutting depth of the DEWALT DCS391B Circular Saw?

The saw has a maximum cutting depth of approximately 2-1/4 inches at a 90-degree angle and 1-5/8 inches at a 45-degree bevel angle.

2. Can I use this circular saw for bevel cuts?

Yes, the DEWALT DCS391B features a 0-50 degree bevel capacity, allowing you to make bevel cuts for various applications such as angled edges and joints.

3. Is the DEWALT DCS391B compatible with other DEWALT 20V MAX batteries?

Yes, the saw is compatible with DEWALT 20V MAX lithium-ion batteries, providing you with the flexibility to use the same batteries across multiple tools.

4. Does the circular saw come with a blade?

Yes, the DEWALT DCS391B comes with a 6-1/2-inch carbide-tipped blade, which is versatile for a range of cutting tasks.

5. Is the DEWALT DCS391B suitable for professional use?

Absolutely, the DCS391B is designed with power and durability in mind, making it a reliable tool for both professional craftsmen and DIY enthusiasts tackling a variety of projects.


In conclusion, the DEWALT DCS391B 20V MAX Circular Saw lives up to its reputation as a reliable and high-performing tool. Its powerful motor, durable build, and ergonomic design make it a valuable asset for DIY enthusiasts, woodworkers, and professionals alike.

While it might not be the most budget-friendly option on the market, the investment is justified by the tool’s performance and the peace of mind that comes with using a trusted brand.

If you’re looking for a circular saw that combines power, precision, and durability, the DEWALT DCS391B is definitely worth considering.

Disclosure: As an Amazon Associate, I earn from qualifying purchases.