DEWALT DCS391B Circular Saw Review – Powertoolbuzz

DEWALT DCS391B Circular Saw Review

dewalt circular saw

DEWALT DCS391B 20-Volt MAX Li-Ion Circular Saw, Tool Only

In A Hurry? Here's A Quick Summary Of The Dewalt Circular Saw Review.

The Dewalt circular saw comes with multiple angle cutting with the ability to cut at angles from 45° up to 90° and the added comfort of enhanced line-of-sight view. Model DCS391B offers a break blade emergency stop and has a lightweight flat head magnesium shoe. This Dewalt 20v circular saw also has a reinforced rubberized grip for fast & tireless performance and complies with the latest industry safety standards.

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For what it’s worth, DEWALT DCS391B 20-Volt MAX Li-Ion Circular Saw may just be a homeowner’s wet dream of a perfect tool. And why shouldn't it be? The skill saw comes from Dewalt; one of the oldest companies out there to date.

The only two contenders to possibly outperform this Dewalt circular saw model are the Bosch CSW41-7 and the Makita XSS02Z. However, patience can run thin when prices are high and the products don’t work as advertised. Especially when you happen to be a proud construction worker who relies on the comfort and convenience of his power tools, this saw might just be the solution to all your cutting needs.

 Read on...

DEWALT DCS391B 20-Volt MAX Li-Ion Circular Saw Review

Right off the bat, the Dewalt 20v circular saw comes accompanied with a slew of features such as a powerful  5250 RPM rotary motor, speed, precision and accuracy. Obviously, what makes it worth it is the unbelievable price factor – i.e. somewhere in the neighborhood of $100.

But there are a few lacking areas where Dewalt could have implemented a better set of features to make it the “ultimate” cutting saw.

dewalt circular saw


In case you didn't know, the DCS391B is the revised model that was released some time after the 390B unit made its debut appearance in the market. Dewalt practically took in all the feedback, made major adjustments and released the new model in an attempt to offer a certain degree of leverage to woodworkers, construction people and homeowners.

While it is true that this mini circular saw, despite of a compact design, carves through plywood like a hot knife through butter, the stock blade does not do well under high pressure. The performance of this skill saw varies according to the thickness of the actual material. With a 6 ½ Inch blade, the saw carves through standard length plywood sheets for up to 20  - 25 times on a single battery charge.

This is definitely a huge improvement over competitor models and the DEWALT DCS390 edition itself. Let’s take a look at some of the key highlights of this product in detail.

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DEWALT DCS391B 20V Circular Saw Key Features:

The DEWALT DCS391B 20-Volt MAX Li-Ion Circular Saw comes with a variety of handy features that make this model a convenient accessory for powertool owners. For starters, if you have never owned a cordless circular saw before, you should know that most of the models are not able to meet the industry requirements these days.

dewalt circular saw


Normally, circular saw manufacturers integrate a combination of three things, i.e. a powerful razor blade motor, preset speed modes and minimum load time. These drool worthy features attract unsuspecting buyers like bees to a honey comb. However, the key factor to back up all these features is the battery life.

Thankfully, Dewalt listened to their loyal customers and introduced a 20V capacity, which is sufficiently better than what other companies are offering within the same price bracket.

Durability & Comfort:

DEWALT DCS391B circular saw showcases a tough magnesium shoe which is not only lightweight, but also offers speed at the same time. The rubber molded grip is small on the outside, but the handle’s interior is fashioned to offer a solid feeling. This way, users are able to aggressively cut through a long range of compatible materials with precision and over various angles.

Speaking of angles, the Dewalt circular saw was designed to offer cutting angles of 90 Degrees and 45 Degrees respectively. Precision and accuracy, however, depend on the material thickness. For instance, you may be able to easily carve through 7 – 8 inches with speed and precision, but a wood panel twice as much thick may require more effort and concentration.

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Battery Performance Vs. Speed:

This one’s a bit of a dilemma in certain situations. The stock carbide tipped blade on this circular saw comes with 16 tooth farming tips. This is more than enough to let users cut through anything that has an average thickness of 7 inches or less. But if you were to go through slightly thicker or dense material, such as lime stone or marble (yes, you read that right; some folks have tried this circular saw model on marble sheets too!), the battery will run out rather quickly.

Beneath all that powerhouse performance, the accuracy and precision factor fall entirely on battery performance. Therefore, to last longer, it is recommended that you use the saw on thin wood panels or plywood sheets.

At the same time, one should know that the default order comes without a battery. You can buy a 4 Amp hour battery for robust performance. It is slightly expensive, but from an investment point of view, there’s no doubt that a 4 Amp battery can outweigh pricing related concerns single handedly.

Convenient Hassle Free Cutting:

Despite of a flat head and a magnesium base, the Dewalt 20v circular saw manages to twist, turn or offer straight line cutting experience at the owners’ whim. Especially when you are intrigued to take on a certain design that requires bevel angled cuts, the saw can be a remarkable product to count on. It is lightweight, and the blade effortlessly works through wood.

dewalt 20v saw-435x296


Usually, circular saws do not offer freedom to users. There is always a sense of “restriction”, even though you can dismantle and replace stock parts with better ones. The results appear to happen a paper cut formula because the said skill saw was made to do a certain specific job.

However, the DCS391B defies those norms to a certain extent. By simply replacing the factory supplied stock blade with a Vermont American 2427 series blade, you are looking at a whopping 40 teeth and an overkill of a performance factor here. The choice of replacement parts is entirely up to you. Bear in mind that Dewalt circular saw’s overall results could be supplemented with other companies accessories to help meet a worker’s needs.

Dewalt Circular Saw Safety Factor:

What makes any tool better than the rest is the overall safety aspect. Top it off with the latest industry enforced OSHA standards, you have to abide by a certain code to carry on with work related chores. Obviously, from a safety perspective, this Dewalt circular saw comes with a nifty feature which we like to call a “blade break.”

Seriously, should you ever feel the need to stop the blade in case of a sudden emergency, just go ahead and release the trigger. Within a second or two the rotary motor will not only stop spinning, but the break feature will actively stop the spinning mechanism dead in its tracks. It is true that power tools offer the convenience of getting things done much faster, but disasters such as personal injury or on-site accidents can only be mitigated through the embedded product safety features.

In addition, Dewalt made the DCS391B unit to cut away from the user’s general direction. The blade naturally pushes its way in the opposite direction if no force or pressure is applied to the saw. This safety feature also causes the wood shavings to literally “fly” away, hence preventing any direct contact with naked/exposed eyes. However, you still need to wear a mask and goggles to get by with a safe and sound experience with not just this circular skill saw, but with any range of power tools.

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Product Specifications Dewalt DCS391B Circular Saw

Dewalt Saw Specifications

DeWalt DCS391B

Bevel Capacity


Battery Type


Blade Diameter

6-1/2 Inch

Dewalt Circular Saw Model


Blade Speed

5250 RPM

  Circular Saw Dimensions

8.5 x 15.5 x 10.5 inches

  Depth of Cut at 45°

1-5/8 Inch.

  Depth of Cut at 90°

2-1/4 inch

  Model DCS391B Voltage

20 V

  Saw Weight

7 lbs.

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What’s in the box

The following is included with the Dewalt DCS391B Circular Saw:

  • Dewalt DCS391B Circular Saw
  • check

DCS391B Dewalt 20V Circular Saw Pros:

  • Old School Design: It is designed like the dual face Roofers Saw design, but with the added comfort of enhanced line-of-sight view.The foundation models broke the view because users had to look over the top of the saw blade to see where they were going. Dewalt offers better field of view through compact design dynamics while still remaining loyal to its roots!
dewalt saw

Source Dewalt

  • Break Blade feature offers emergency stop.
  • Lightweight flat head magnesium shoe allows the saw to sit solid on a long range of material surfaces.
  • Multiple Angle Cutting: Dewalt DCS391B circular saw has the ability to cut at angles ranging over 45 Degrees, 50 Degrees and 90 Degrees. If you are a skilled worker, you can make the cuts easily at literally any angle – for as long as the desired material is of ideal proportion and density.
  • Reinforced rubberized grip for fast & tireless performance. Users are not labored down by fatigue through long hours of work with this particular model.
  • Complies with latest industry and OSHA safety standards.

Cons or ‘The Could be Better’ Part!

Sadly, like some other products, the DCS391B Dewalt mini cicular saw does have a few setbacks. They are appended below for your ready reference.
  • Default 16 tooth carbide blade offers certain level of performance within a limited capacity.
  • The “Tool Only” design is a bit of a downer for those who were expecting a Li-ion battery to accompany their brand new purchase.
  • Overhead vertical cuts from bottom to top motion can pose a challenge.
  • .Users need to fork up a small amount of money for a minimum 4.0 – 5.0 Amp Hour battery. Other batteries will not last long under intense demands.
  • If speed is the least of your concerns, the circular saw can churn out spectacular results.

To Buy or Not to Buy the DEWALT DCS391B 20-Volt MAX Li-Ion Circular Saw

Although Dewalt has put together a nifty package for homeowners and professional users alike, this is by no means the ultimate circular saw in the market. Deep down in there, construction and woodworkers yearn for a AIO kind of powertool that needs no further modification or has additional expenses. However, things are a little different in the manufacturer realm.

The DCS391 model is an excellent combination of cheap, affordable and long lasting performance. While the Dewalt circular saw can shy away from dense/ thick material in terms of speed, it makes up for that by offering precise results. The overall package is appropriate for intermediate and beginner level users. However, this circular saw is not highly recommended to professionals who wish to get by with extremely impressive results.

Given that this is a cordless battery powered design, Dewalt had to make a few tough choices. Overall, this circular saw is a great and handy tool for users from all over the world. Top it off with a 3 year manufacturer warranty, which can render useful at hundreds of Dewalt official franchises, your investment is backed up with a strong sense of satisfaction and peace of mind.

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Still not sure if the Dewalt circular saw is the right saw for you? You got 2 options available to you on our website. Compare the best circular saws or read our complete circular saw tool guide. Hope these can help you make your decision on which saw you should buy

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