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Model#: DEWNDCS391B

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Brand new items;Full manufacturer warranty available
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Dewalt DCS391B 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Bare Tool)

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  • Note: Battery & Charger sold separately
New $129.00
Recon $89.99
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The DCS391B 20V MAX 6-1/2 in. Circular Saw with a 6-1/2 in. carbide tipped blade operates on a powerful 5150 RPM motor with a 0 to 50-degree bevel capacity on a lightweight and durable magnesium shoe.
  • Powerful 460 MWO, 5,150 RPM motor delivers power and speed to make the most demanding cuts with ease
  • Optimized rubber overmolded comfort grip delivers optimal balance and control
  • 6-1/2 in. carbide-tipped blade for cutting 2 times material at 90-deg. and 45-deg. and more cuts per charge
  • High strength and lightweight magnesium shoe provides jobsite durability for long-term cut accuracy
  • 0-50-deg. bevel capacity allows for aggressive bevel cuts for a multitude of applications
  • 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw - DCS391B
  • Bare Tool - Batteries and Charger Sold Separately
Compliance and Restrictions
warning: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to


Series: 20V MAX
Cordless: Yes
Length: 12.2 in.
Weight: 8.0 lbs.
Arbor Size: 5/8 in.
Batteries Included: 0
Battery Type: Li-Ion
Bevel Capacity: 0 - 50 Degrees
Blade Diameter: 6-1/2 in.
Blade Position: Left
Depth of Cut at 90 Degrees: 2-1/8 in.
RPM: 3,700
Voltage: 20V



4.8 / 5.0
109 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (92)
Easy To Use (87)
Powerful (80)
Ergonomic Design (8)
Value (8)
Lack of Power (1)
Loud (1)
Best Uses
Home Repair (59)
Small Projects (9)
Jobsite (6)
Frequent Use (4)
Yes, I would recommend this to a friend
Ergonomic Design
Battery Longevity (if applicable)
Best Uses
Frequent Use
Small Projects
Home Repair
Dewalt DCS391B 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw
used for shop, dimensional lumber cutoff, ripping, smooth easy cutting with new blade. Plastic guards, metal shoe, reliable and more durable than similar but 1 inch smaller Porter Cable.
December 8, 2018
3 weeks ago
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Small Projects
Home Repair
well engineered saw that makes it easy to cut
Light and powerful, I really am impressed with its cutting ability.I am a carpenter with 40 years working with the trade, and don't impress easy.
December 6, 2018
3 weeks ago
Describe Yourself:
Convenient and safe
Can’t beat going cordless. Powerful enough, cuts straight, safety is solid, light. All around solid skill.
This review was collected as part of a promotion
November 17, 2018
Originally posted at
Officially hooked
Bought this 2 months ago after buying an oscillating multi-tool and loving it. Only used it for the occasional single cut. Yesterday I built a 100sqft deck. I forgot my 9ah battery at home and only had a 2ah with me. I thought, I'll run until it's dead and call it a day early. This thing made EVERY cut of joist and decking needed. It even drove all the lag bolts and deck screws. Deck done, battery life still able to do more. These things must be nuclear powered! My other battery circular saw (non-dewalt) was even enough to cut the old deck out. It could only cut maybe 10-12' of board before bat death. This was my 2nd DeWalt purchase. Officially hooked! Like with the oscillating multi-tool I want a rigid case
This review was collected as part of a promotion
November 17, 2018
Originally posted at
DeWalt Quality.
When it came time to renovate my basement, I knew I would need to update my old DeWalt 18v tools.

My wife gave me clearance to buy every tool I would need. I’ve always been a fan of DeWalt, so it was an easy choice. I loaded up on DeWalt 20v tools.

This saw is tough as nails. I use it for everything including pressure treated 2x12 stair stringers. It is super convenient to be cordless AND powerful.

If you are reading this, just buy it. You will not regret it.
This review was collected as part of a promotion
November 16, 2018
Originally posted at
Light & Effective!
This is the first cordless tool that I have purchased besides drills and impact drivers. This saw has tackled every job I've thrown at it. Make sure to have a 4 or 5 Ah battery and the proper blade for your job and you will never have to worry about running out of power.
This review was collected as part of a promotion
November 15, 2018
Originally posted at
Light Duty Saw
I bought this saw to cut off some bad half log siding. It is light enough that I could use it one handed off a scaffold though I would not recommend it. I had bought it as part of a kit and it had a 1.5 aH battery pack. You really need a bigger capacity battery for any extended cutting at all. The saw really burns through the charge. I do have another 1.5 battery to use, but they take time to charge.
November 6, 2018
Originally posted at
OK tool
This is the first cordless circular saw Ive owned. I love the weight and the maneuverability of it. I had to get the 5Ah batteries because the 2Ah wouldn't last but a few seconds cutting through plywood. My only issue is that the switch keeps overheating and melting. I have repaired it once and now I cant anymore. A new switch is $87 so I might as well buy a new one as I don't want to waste my money and risk it happening again. Dewalt, sell the switch and not the whole assembly.
October 8, 2018
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Battery Longevity (if applicable)
Best Uses
Home Repair
Great saw
Couldn’t believe how good it was. Sure beats my old Ryobi
July 13, 2018
5 months ago
Describe Yourself:
Beginner- Casual Do-it-Yourselfer
Finest cut with a 40T 6.5 blade
This 20v max 6.5 saw is a dream to use for a casual home builder. The brake is immediate, the guide is spot on, the power even with a 2ah 20V max battery is more then adequate. FOR SAFETY: You can not beat the fact it will stop if the blade binds. I am not sure if its a feature but it has prevented issues. One issue is the 6.5 size blade vs the standard 7.25. The blades were bought online, This great saw was purchased from Home Depot with the drill driver bundle that included 2 choices of added tools. Thanks DeWalt, I finally step up to the pro tools.
June 25, 2018
Originally posted at

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 23 questions Browse 23 questions and 34 answers
Does this saw include the blade?
John on Apr 19, 2016
BEST ANSWER: Yes, it comes with a framing blade.
Will 1.5 amp batteries run this saw or do you need 3amp?
hydro on Apr 6, 2016
BEST ANSWER: I used my existing 1.5 mah and it held its own on 1/2 plywood but I
immediately decided 3.0 mah would be a match and ordered two. If you have
2, 1.5's you'll be ok for the moment unless cutting 2x4, 2x6 continuously.
Can you change the depth of the blade with this saw?
Ryan B on Apr 3, 2017
BEST ANSWER: Yes, it is infinitely adjustable. It is just a quick turn clamp that you loosen and tighten by hand a the desired depth.
Does it come with wrench for blade?
A shopper on Oct 26, 2016
BEST ANSWER: It doesn't come with a wrench, has an allen key to remove the blade that is attached to the saw.
I have a he dewaltt DW 936 18 volt trim saw and wanted to purchase this also, but wondered if this saw is also a trim saw,nor more of a heavier duty saw.
Captain D on May 23, 2016
BEST ANSWER: That unit will be more heavy duty than a comparable trim saw.
What AMP battery should I order for the Dewalt DCS391 20V cordless saw?
James V on Jun 12, 2018
BEST ANSWER: If you plan on using the saw for a serious project where you will be doing a fair amount of cutting, you should go with the 5Ah (DCB205), or at a minimum, the 4 Ah (DCB204). Hope this helps.
Will a 20 volt 1.3ah battery work in this saw. Those are the batteries that came with my impact driver.
Captain D on May 23, 2016
BEST ANSWER: Yes, all of the 20V MAX batteries are interchangeable.
will the saw cut ipa wood successfully?
Honey on Jun 24, 2015
BEST ANSWER: Yes, it will work on IPE wood.
It came with batery and charger?
A shopper on Nov 20, 2017
BEST ANSWER: No, bare tool.
Do you ship to Maldives?

Thsnk you
Musa663 on Jun 2, 2016
BEST ANSWER: CPO only ships within the United States at this time.

New Vs. Reconditioned

What's the difference between New and Factory-Reconditioned?

Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
  • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
  • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
  • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw - DCS391B,
Bare Tool - Batteries and Charger Sold Separately
20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Bare Tool) - DCS391BR,
Bare Tool - Batteries and Charger Sold Separately
Availability: In Stock In Stock
Warranty: 3 Year Limited 1 Year Limited
Price: $129.00 $89.99
You Save: N/A $39.01 (30%)


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.