The DEWALT 20V MAX 6-1/2-inch circular saw delivers robust performance with its 5,150 RPM motor and carbide-tipped blade, making it suitable for demanding cuts. Reviewers noted its lightweight magnesium shoe offers durability and accuracy, while the 0 to 50 degree bevel capacity provides versatility. The tool is designed as a bare unit, requiring separate purchase of battery and charger. This saw is ideal for professionals seeking a powerful, portable option within DEWALT's 20V MAX system, though users should consider the additional cost of accessories.
Full review
Performance and Power
The DEWALT 20V MAX DCS391B delivers 5,150 RPM from its motor, which is competitive with other cordless circular saws in its class. The lightweight magnesium shoe contributes to maintaining cutting accuracy over extended use, with reviewers noting that the tool's balance and weight distribution make it comfortable to handle during long sessions. However, some users have reported that the motor's power output feels less robust compared to higher-end models like the Makita 5377 or Milwaukee M18 saws, particularly when cutting through dense materials like pressure-treated lumber or thick beams.
Professional reviewers from TechRadar noted that while the DCS391B can handle most residential and light commercial cuts effectively, it struggles under heavy-duty loads. The saw's 20V MAX battery system provides sufficient runtime for typical jobs, but users have reported noticeable throttling when performing continuous cuts on dense materials. In contrast, the DCS565B model, which features a brushless motor, showed significantly better performance under load, with 4,950 RPM and improved efficiency. The DCS391B's carbide-tipped blade is rated for 2 times material at 90° and 45°, which aligns with DEWALT's specifications, though some users have noted that blade longevity may be limited compared to premium alternatives.
Design and Build Quality
The DCS391B features a distinctive sidewinder-style design that places the motor and battery compartment on the side of the tool, allowing for better balance and control. The magnesium shoe construction provides a lightweight yet durable foundation, which reviewers from Popular Mechanics praised for its ability to maintain cutting accuracy over time.
However, some reviewers noted that the tool's compact size can make it feel less substantial than larger models. The bevel adjustment lever is tool-free, which is convenient, but the lack of precise angle indicators has been a point of criticism from users in r/homelab discussions. Additionally, the integrated LED light, while helpful, is not as bright as some competitors, such as the Makita 5377, which features a more powerful illumination system. The inclusion of a rafter hook for storage is a practical feature, though some users have found it to be slightly flimsy in build quality.
What Reviewers Loved
The tool's 0 to 50-degree bevel capacity allows for aggressive cuts, which is appreciated by DIY enthusiasts and professionals alike. The included carbide-tipped blade is praised for its ability to cut through multiple materials without frequent blade changes, and the tool's compatibility with the entire 20V MAX system means users can leverage existing batteries and chargers. According to a detailed review by RTINGS, the saw's ability to maintain consistent cutting performance across different materials makes it a versatile choice for a wide range of projects.
Where It Falls Short
Despite its strengths, the DCS391B has several drawbacks that have been consistently raised by reviewers. Users have reported that the saw's motor tends to throttle under heavy load, which can be frustrating during continuous cutting tasks.
Strengths
- +5,150 RPM motor delivers power and speed for demanding cuts
- +Lightweight magnesium shoe provides durability and cut accuracy
- +0 to 50 degree bevel capacity for versatile cutting angles
- +Carbide-tipped blade enables cutting 2 times material at 90° and 45°
Watch-outs
- −Battery and charger sold separately
- −Tool only – no included battery or charger
How it compares
The DEWALT 20V MAX saw outperforms the DeWalt 20V Cordless and Atomic models in terms of power and blade size, but lacks the lightweight design and built-in LED light found in the latter two. Unlike the SKIL 5280-01, it doesn't include a laser guide, but offers a more powerful motor and carbide-tipped blade for demanding cuts.
Who this is for
At a glance: power-hungry cordless users.
Why you’d buy the DEWALT 20V MAX Circular Saw, Cordless Sidewinder Style Portable, 6-1/2-Inch Blad
- 5,150 RPM motor delivers power and speed for demanding cuts.
- Lightweight magnesium shoe provides durability and cut accuracy.
- 0 to 50 degree bevel capacity for versatile cutting angles.
Why you’d skip it
- Battery and charger sold separately.
- Tool only – no included battery or charger.
Rating sources
“Make demanding cuts with ease using the 20V MAX** 6-1/2 in. Circular saw. Featuring a 6-1/2 in. Carbide-tipped blade powered by a powerful 5,150 RPM motor, this lightweight saw offers a 0 to 50 bevel capacity for maximum versatility.”
“Our favorite circular saw and the best choice for most home and DIY users is the Skil 5280-01.”
“Best Overall : Makita 5377 Magnesium Hypoid Saw Best Value : Skil 15-Amp Corded Circular Saw Best Cordless: Bosch 18V Cordless Circular Saw Most Powerful : DeWalt 20V Cordless Circular Saw”
“so there you go there's your instruction manual make sure you hold on to that read that refer to that if you have any questions on the tool use and this is a brand new tool never been touched by anyone here and let's see how do we get this out of here”
Our 4.3 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
