DEWALT 6-1/2-Inch 20V MAX Circular Saw, Tool Only (DCS391B)

(10 customer reviews)

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5150 RPM motor of DEWALT circular saw delivers power and speed to make the most demanding cuts with ease

High strength and lightweight magnesium shoe of the corded circular saw provides jobsite durability for long-term cut accuracy

Optimized rubber overmolded comfort grip of the compact circular saw delivers optimal balance and control

0-50 degree bevel capacity allows for aggressive bevel cuts for a multitude of applications

6-1/2-inch carbide-tipped blade for cutting 2 times material at 90 degree and 45 degree and more cuts per charge

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SKU: B007NVSTO8 Category:

From the manufacturer



Part Number


Item Weight

‎7.1 pounds

Product Dimensions

‎8.5 x 15.5 x 10.5 inches

Country of Origin


Item model number



‎1 Lithium ion batteries required.

Is Discontinued By Manufacturer





‎20V 6-1/2" Saw (Tool Only)





Power Source

‎Battery Powered


‎20 Volts

Item Package Quantity


Number Of Pieces


Head Style


Number of Handles


Handle Material


Blade Length

‎6.5 Inches


‎5150 RPM

Measurement System


Accessory Connection Type

‎5/8" Arbor



Included Components

‎20v 6-1/2" circular saw

Batteries Included?


Batteries Required?


Warranty Description

‎3 Year Limited Warranty





Customer Reviews

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Best Sellers Rank

#2,119 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)#1 in Power Circular Saws

Domestic Shipping

Item can be shipped within U.S.

International Shipping

This item is not eligible for international shipping. Learn More

Date First Available

March 23, 2012

10 reviews for DEWALT 6-1/2-Inch 20V MAX Circular Saw, Tool Only (DCS391B)

  1. faithless

    I have framed my whole basement and garage with this saw and dewalt driver / hammer drill combo. It is the perfect saw for me. It cuts fast, lasts surprisingly very long even on the 2amp battery. The best feature is the way they designed the bottom plate you can see EXACTLY where your blade is cutting. I make perfect cuts with this every time. It is also pretty quiet compared to a plug in saw. I cut 2×4 all night in the basement while people slept upstairs. This is the only saw I will ever need for house projects.

  2. Steve

    got tired of running extension cords for my skill saw. so figured it was time to add another dewalt 20 volt tool to my inventory. didn’t notice till after i purchased it was a 6.5″ saw but still does the job. And blades are about 25-30% cheaper for the 6.5″ then the 7 1/4″. Used to cut 2×4’s, osb and sawed 2×6’s and cut them all without a issue.Would recommend not leaving battery in unit. Safety switch works but would be easy to accidently hit safety switch and on switch while carrying it. so i always carry unit without battery and put battery in when i use it.

  3. noyoma

    This is the best circular saw I have owned. It has as much power as any corded saw I have used. I have only used it on one project so far, but it exceeded my expectations. This will make my corded saw feel like my corded drill….unused. The light could be better placed to see the cut, but my corded saw doesn’t have a light at all, The belt clip is handy.

  4. Charles Cromer

    This is the finest circular saw I have owned and I have owned many. I have waited for some time for a full sized, full featured right-blade 7-1/4″ sidewinder. I am a fully seasoned former carpenter and I have always personally preferred B&D Sawcats, the very similar DeWalt models, Makitas and the better grade Skils. I have other cordless saws in various sizes which with the exception of a small 12v Makita are all left-blade saws. I consider them preferable only for cutting sheetgoods. I have 2 Skil wormdrives which I have used a bit when framing using West Coast methods. Most of my work was done with East Coast methods and therefore using right-blade sidewinders such as this. This saw has the fastest rotational speed I have used and that is perfect with modern thin kerf blades. This saw arrived perfectly aligned and adjusted. I particularly like the instantaneous blade brake, the led light which illuminates the line of cut exceedingly well, the balance and, of course, the lack of a cord. I remember many hours of frustration fighting cords in my time. I remember several near accidents using old saws without brakes. I would have loved to have had such a saw as this 15 to 50 years ago. One note; The pictured saw shows no rafter hook. The one I received has an excellent flip-out rafter hook. Icing on the cake! ……What a terrific saw!

  5. LLogan

    We needed a saw that we could move around in and outside our shop to cut wooden crates open. This saw fit the bill. We paired it with Dewalt’s DCB205-2 20V MAX XR 5.0Ah Lithium Ion Battery. They do a fair job of keeping up with the saw. We also use it to trim pallets down to custom sizes or cut lumber to make larger pallets when necessary.I liked it so much I bought one for use personally and used it to cut the tops off 50 pressure treated 4×4’s for a fence. Managed that on one 5.0 Ah battery. Was adjusted to 22.5 degrees and set at deepest cut depth. No problems. Was even used to rip a 45 degree angle at the edge of 2 of the 4×4’s. Only time it bogged down was when I didn’t have the blade very straight on a plunge cut (I know, this saw isn’t meant for plunge cuts).

  6. APRoush

    Excellent kit. Batteries are underpowered for anything but the normal drill. They operate the equipment fine but you are only going to get a about 15-20 cuts on a 2×4 with the regular battery. With two batteries you may be okay if your not cutting a lot fast but I built a shed and wished I would have bought a 5 or 6 amp hour battery earlier. I spent the first two days spending most of my time trying to figure out what I could do while batteries were charging then prime came through with the big battery and I was pretty solid the rest of the project.

  7. Rollogic

    I like that this saw is lightweight and easy to use. High quality and I like that the brake stops instantly when the trigger is released. Has depth adjustability with measurement gauge and 45 degree angle. It is easy to use and great for cutting sub-floor, stringers, 2×4’s and much more. I have had no issues with not being able to keep up with the tasks I’ve subjected it to.The reason I bought this one is because almost all of the DeWalt power tool package kits I was looking at buying all had “left-handed” circular saws I didn’t want and DeWalt flashlights I didn’t need. So I didn’t buy the kit. I bought the “right-hand” saw I wanted and bought the other power tools I wanted that were in the kit individually. Also the kits only came with two 2.0AH batteries that I didn’t feel would keep up with heavy use of a saw like this. So I bought the DeWalt 60V reciprocating saw kit that had two 6.0AH batteries that would be better suited for this circular saw. It was only slightly more expensive to get the tools I wanted individually, but got what I wanted and the batteries I preferred.This saw was purchased tool only. The battery in the picture was purchased separately.Really like this saw and would buy it again.

  8. Gavaronee

    I simply adore this saw. I install real estate signs as side job and I have always used a hand saw when I need to cut wood while on the road (which is about once or twice a week). I didn’t realize how significantly batteries have improved over the years and was embarrassed when I realized how much simpler this made my job. This saw is powerful and will go a long way on a single battery. I have been finding tons of uses for it and have used it a few dozen times since I purchased it. I was so impressed that I’ve been buying other Dewalt battery tools and love all of them. I’ve had the same 18V Dewalt drill for at least the last 15 years and it is running like a champ. I hope to get many years of use out of this. It has paid for itself already.

  9. daisy lani

    saw has lots of power almost as much as the flex volt but will work on the regular 20Vmax batteries so you don’t have to buy new batteries. since it uses the smaller batteries it is also much lighter. I chose this over the DCS391 since it is brushless, My perfect saw would be a 6-1/2″ brushless for the compact size but Dewalt doesn’t make one so this is the only option.

  10. Ellis Guy

    I really like this saw and rechargeable system. Is it possible to love a saw? I have several tools that use the 20-volt batteries, including the 20-volt rotary hammer and 3 different chargers, as well as the 12-volt vehicle charger so I can recharge the compatible hand-held flashlight and flood light for road emergencies or anywhere I need to see in the dark. I carry them wherever I drive. One never knows.As with any saw, using a sharp blade appropriate for the material one is cutting is always the most important measure to ensure top performance. I have this saw paired with the premium 5Ah & 4Ah batteries and a selection of blades for different materials, some Dewalts and some Diablos (my favorite blades). It fully exceeds my expectations. It will cut all day and then some. It’s light and extremely portable, and it tears through solid oak and maple like it’s going through soft butter. There is a small “learning curve,” as one becomes comfortable with the saw blade on the left side of the tool, as viewed from the operator’s perspective. The corded saws I’ve always used have the blade on the right side, but it doesn’t take long to adapt to this configuration. Without a doubt, this saw is my favorite power tool followed by the rotary hammer, which is a close second.The only (small) source of disappointment is that it’s shipped without a rip fence. For the life of me, this seems rather cheap behavior on the part of DeWalt, a manufacturer of quality tools that usually doesn’t cut corners in my experience. My guess is that it would probably only have cost DeWalt a few extra pennies to have included the rip fence with the tool rather than inconvenience customers with the necessity of purchasing it separately upon discovering this admittedly minor deficiency. The rip fence is available on Amazon for about thirteen dollars as I write, so that issue can be readily addressed. It seems odd, though, and the discovery of the absence of a rip fence in the package might lower the perception of value for some customers. With shipping charges and sales tax, it could easily add $15-20 to the total cost of the saw. Of course, if one does not intend to rip, one might elect to skip it, but that could be short-sighted. From my perspective, one never knows if the rip fence might be needed in the future and there could come a time when it may not be as readily available, so my choice was to make the purchase so as to have it on hand for any contingency.I’m so pleased with this saw that I’m thinking of purchasing the Dewalt 36-volt cordless saw as well. The 36-volt tool uses full-sized 7¼ blades and has even more power than the 20-volt model, thus allowing one to cut thicker material, likely with even greater battery charge longevity, but I digress. To be clear, the reviewed model (20-volt) will meet the needs of the vast majority of those looking for a well-performing portable saw without the encumbrances presented by a cord and its not as heavy as the 36-volt model. I think there’s some good news if I decide to purchase the larger model as well in that the rip fence appears to be interchangeable between the two saws, so that assuages the issue from my perspective. Anything I would add would be all good, however it should be obvious that I’m pleased to have made the purchase of this quality DeWalt product.

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