DEWALT DCS391B 6-1/2-Inch 20V MAX Circular Saw

Last updated date: May 17, 2021

DWYM Score

9.2

DEWALT DCS391B 6-1/2-Inch 20V MAX Circular Saw

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We looked at the top Circular Saws and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Circular Saw you should buy.

Update as May 17, 2021:
Checkout The Best Circular Saw for a detailed review of all the top circular saws.

Overall Take

Whether you're building a cabinet or creating a deck to surround your pool, this circular saw is a must-have tool. The saw is high-strength, durable and has a 0 to 50-degree bevel capacity. It's important to note that you will need to purchase a battery and charger separately, as they are not included.


In our analysis of 26 expert reviews, the DEWALT DCS391B 6-1/2-Inch 20V MAX Circular Saw placed 5th when we looked at the top 14 products in the category. For the full ranking, see below.

From The Manufacturer

The DEWALT DCS391B 20V MAX 6-1/2" Circular Saw features a powerful 460 MWO, 5150 RPM motor that delivers power and speed to make the most demanding cuts with ease. A high strength and lightweight magnesium shoe provides jobsite durability for long-term cut accuracy, and an optimized rubber over-molded comfort grip delivers optimal balance and control. The 0 Degree-50 Degree bevel capacity allows for aggressive bevel cuts for a multitude of applications, along with the 6-1/2" carbide tipped blade for cutting 2x material at 90-Degree and 45-Degree and more cuts per charge. No load speed: 5150 rpm, Arbor size: 5/8", Depth of cut at 45-Degree: 1-5/8", Depth of cut at 90-Degree: 2-1/8". Includes: DCS391 6-1/2" Circular Saw, 6-1/2" Carbide-tipped Blade. This is a bare tool item (battery sold separately).

Expert Reviews

User Summarized Score

9.6
5,442 user reviews

What experts liked

What experts didn't like

An Overview On Circular Saws

Circular saws are one of the most popular power tools out there, and having one is an absolute must for any DIYer or craftsperson. Circular saws come in a number of styles and configurations. One of the first considerations when choosing a circular saw is whether you want a corded or cordless model.

Cordless models are generally smaller and provide the convenience of transporting the saw someplace else, or operating in spaces where extension cords are unavailable or unsafe. However, the batteries on cordless saws drain quickly when cutting tougher or thicker material. Corded saws are generally slightly larger and can provide more cutting power for longer periods of time.

The other major determining factor in circular saws is blade size. Along with corded or cordless designations, most circular saws are referred to by the specs of their cutting edges. The most common blade size is 7  1/4 inches. Blade size determines the cutting depth of the saw, or what thickness of material it’s capable of cutting through in one go. Saw manufacturers will often include straight-down cutting depth in a circular saw’s specifications, and sometimes also 45-degree cutting depth.

Circular saws also vary by type of motor. Sidewinder circular saws are the most common, in which the motor is aligned along the same axis as the blade. These versatile tools are suited to most applications. Worm drive saws have the motor positioned at a right angle to the blade and use gears to increase the torque transferred to the blade. These powerful devices are ideal for heavy-duty jobs, but they are also heavier.

Regardless of the type of saw you choose, you should verify that you know how to use it safely before getting started. A good way to accomplish this is by spending some time with the instruction manual before you do anything else.

Other considerations with circular saws include shoe material, guides and bevel abilities. The shoe is the foot plate that rests on the work surface, and it can be made from a variety of materials, including aluminum, steel and magnesium. When considering shoe materials, it’s important to balance durability and weight. Shoes can also incorporate guides for measuring and aligning cuts.

Finally, a saw’s bevel abilities refer to the angles at which it can cut. If you work on a number of complicated projects that might require more than a few standard angles, you should seek a circular saw with enhanced capabilities.

The Circular Saw Buying Guide

  • Consider whether your planned jobs will require angled or beveled cuts. Circular saws with bevel capabilities often have “stops” at specific angles to aid in making accurate bevel cuts.
  • The most common stops are 45 degrees and 22 1/2 degrees.
  • Blade material is a crucial factor in determining what the circular saw can cut and how quickly the blade will dull.
  • Blade types include steel, high-speed steel, carbide-tipped, tile-cutting and masonry blades.
  • Ergonomics are important when comparing circular saws. The various knobs, handles and other surfaces should be suited to the size of your hand and be comfortable to grip and operate.
  • Be sure to buy safety gear like goggles, work gloves and a dust mask when you order your circular saw. You should use these, along with long pants, long sleeves and steel-toed shoes, while you work with power tools.