Model#: DEWNDCS391B

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Dewalt DCS391B 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Bare Tool)

  • Note: Battery & Charger sold separately
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  • Slices through tough materials with barely any effort, thanks to its powerful 460 MWO and 3,700 RPM motor
  • Rubber over molded comfort grip makes operation more controlled and pleasant
  • Cut accuracy is ensured with the tough, lightweight magnesium shoe
  • 0 - 50 degree bevel capacity allows for powerful bevel cuts
  • 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Bare Tool) - DCS391B
  • Bare Tool - Batteries and Charger Sold Separately


Series: 20V MAX
Cordless: Yes
Length: 12.2 in.
Weight: 8.0 lbs.
Arbor Size: 5/8 in.
Batteries Included: Bare Tool
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

More Versions Of This Item

Item Name Price
DEWNDCS391P1 Dewalt 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw Kit
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4.8 / 5.0
93 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (88)
Easy To Use (82)
Powerful (74)
Ergonomic Design (4)
Battery Longevity (if applicable) (3)
Lack of Power (1)
Best Uses
Home Repair (54)
Small Projects (4)
Jobsite (3)
Frequent Use (2)
Yes, I would recommend this to a friend
Easy To Use
Good for general cuts, not fine work
I use this saw for general construction work. Cutting 2x4s to size, making quick cuts where the quality of the edge is not important. It's small, fairly light and handy. I bought the 20v MAX combo kit with the larger batteries, all of them have gotten a LOT of use. The thing that I like about all of these tools, this saw included is that with the battery mounted all of them are really well balanced. If you hold the tool in one hand in the center of the handle, it does not pitch forward or backward. Your muscles are just used to use and guide the tool, not to have to work against gravity to balance it. Much less fatiguing when you do a lot of work and easier to do precise work.
The blade that comes with it is rubbish and dulled quickly just cutting soft pine, etc. I put a good Diablo blade on it and it is much better.

This saw is not a finishing saw or a saw you reach for to make important, clean edged cuts. The blade just turns too slowly and it lacks power. You can bog the motor without too much effort. For important cuts that I need to do by hand (e.g. not possible or practical to do on the table saw) I always reach for my corded saw. Much more powerful, blade spins a lot quicker, and with a good blade I can get a really good edge.
Use this saw for what it's good at- doing quick cuts where you need a handy light saw away from an outlet. If you try to do finish work with it, you'll be disappointed.
October 14, 2014
Yes, I would recommend this to a friend
Easy To Use
Wow, is this saw sweet
When I first pulled the trigger I thought it was faulty as it made such little noise compared to every hand saw I ever used. It was working fine and ripped a 2x6 better than my wired skil saw. I order a 4amp battery immediately as I only had 1.5's and ordered this bare. If you don't have this saw you have no idea what you are missing. Get one!
January 16, 2014
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Easy To Use
One solid saw!
This cordless saw has plenty of speed and power for just about any cutting job. It goes through 2x6 pressure treated lumber like it's butter. Controls and handle are comfortable and it's not too loud either. One small mark against it is that there's no real system to move sawdust out of the operator's area. Other saws I've had used a small chute at the base of the saw guard to funnel sawdust to the side. The DeWalt doesn't have this, so the sawdust has to come out between the two halves of the saw guard, putting sawdust in the air instead of shooting it cleanly out of the way. If they can fix this little flaw, I'd give it five stars!
July 22, 2014
Yes, I would recommend this to a friend
Easy To Use
Very Impressed
Didn't bog down cutting a 4 X 4. You can feel the power.
September 11, 2012
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
Best cordless tool to buy
Easy to use and it is light weight to work with. I love this tool so much, I had to get one for myself. Great job Dewalt.
January 24, 2016
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
Should have bought it sooner
No cord to bother with
June 19, 2016
Yes, I would recommend this to a friend
Easy To Use
Good product
Would recommend to anyone
July 24, 2015
Yes, I would recommend this to a friend
Easy To Use
Great but not great
Got the product and saw was spinning backwords, but I took it apart and swapped a couple of wires and now it works great!
March 10, 2016
Great saw
I used a borrowed skill saw to built a shed, but got tired of waiting for the saw to be available. Purchased this saw with a 4.0AH battery, worked pretty good cutting aspenite and 2x4. After reading reviews, I purchased a 40T blade and this make a big difference on the saw,a lot smoother. No issue with the battery running down.
November 13, 2014
Originally posted at
Yes, I would recommend this to a friend
Nice Saw
Works great light and cuts well
August 20, 2013

Questions & Answers

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Browse 25 questions Browse 25 questions and 38 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.
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.
Is this a 1.5 amp or 3 amp saw?
M on Oct 17, 2012
BEST ANSWER: The 20V MAX Cordless Lithium-Ion 6-1/2-in Circular Saw being offer is model DCS391B, the 3.0 amp model. The 1.5 amp is a different model number.
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.
Will a 20v Max Llithium ION 1.5 AH Dewalt battery that is the battery used in my Dewalt 1/4" 20v Max Cordless Impact Driver work with this saw?
Tom on Jan 20, 2016
BEST ANSWER: Yes, a Dewalt 20v 1.5 ah battery will work with Dewalt's 20v impact driver.
What are the max RPMs? It is listed under details as 3700 and under specs as 5250.
Johnny O' on Dec 11, 2015
BEST ANSWER: The max rpms is 3700.
will this saw work with the 3amp lith-ion batt?(20v)
g-man on Apr 16, 2014
BEST ANSWER: Yes, a 3 Ah battery will work fine with this saw.
kenny on Oct 21, 2013
BEST ANSWER: We do not stock parts here in our warehouse. You can contact DeWalt directly at 1-800-433-9258.
Is there a difference if I use Max XR Li-on 2.0 or 4.0 amp battery on this saw?
Thank you
Tom on Aug 9, 2013
BEST ANSWER: No, you can use either battery with this saw. The only difference is the 4.0 AH battery will run longer.
Can I use 20v max XR li-on on this saw?
Thank you
Tomvi on Jul 7, 2013
BEST ANSWER: Yes, the XR batteries can be used with this saw.
Do all 20volt tools use the same battery?
Mike K on Jul 7, 2017
what is the run time with a 2AH battery?
Don G on May 19, 2017

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 60 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Bare Tool) - 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 Out of Stock
Warranty: 3 Year Limited 1 Year Limited


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.