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Internet # 203164241

Model # DCS391B

Store SKU # 530376

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20V MAX Cordless 6.5 in. Sidewinder Style Circular Saw (Tool Only)

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$159.00
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  • 20-Volt motor delivers up to 5,150 RPM
  • Up to 50 degree bevel cut capacity
  • 2-1/8 in. cutting capacity at 90 degrees
  • View More Details

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Product Details

About This Product

Make demanding cuts with ease using the 20V MAX 6-1/2 in. Circular Saw. A high-performance motor running at 5,150 revolutions per minute helps users make fast, confident cuts, while the 6-1/2 in. carbide-tipped blade supports a wide range of cutting tasks. The lightweight design and durable magnesium shoe help provide long-term cut accuracy and jobsite-ready durability, and the 0 to 50° bevel capacity adds versatility for angled cuts. An optimized comfort grip helps improve balance and control during use. Battery and charger sold separately.

Highlights

  • Cut with Cordless Confidence - Handle demanding applications with a high-performance motor that delivers 5,150 revolutions per minute for fast, powerful cutting
  • Maintain Long-Term Accuracy - Take on tough jobs with a high-strength magnesium shoe that combines lightweight durability with dependable cut stability
  • Improve Comfort and Control - Work with greater balance and handling using an optimized rubber overmold grip designed for user comfort
  • Make Versatile Bevel Cuts - Tackle a wide range of applications with 0 to 50 degree bevel capacity for aggressive angled cutting
  • Cut Common Materials Efficiently - Use the 6-1/2 inch carbide-tipped blade to cut 2 times material at 90 degrees and 45 degrees and get more cuts per charge
  • Tool Only Convenience - Add this circular saw to your existing setup with battery and charger sold separately
  • Backed for Added Confidence - Includes a 3 year limited warranty, 1 year free service, and 90 day money back guarantee
  • Expand your system - batteries are compatible with the DEWALT 20V MAX system, giving you access to a wide range of cordless tools
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Product Information

Internet # 203164241

Model # DCS391B

Store SKU # 530376

Additional Resources

Shop All DEWALT

Specifications

Dimensions: H 10.5 in, W 15.5 in, D 8.5 in

Dimensions

Blade Diameter (in.)

6-1/2 in

Product Depth (in.)

8.5 in

Product Height (in.)

10.5 in

Product Width (in.)

15.5 in

Details

Battery Amp Hours

No Battery

Battery Power Type

Lithium Ion

Battery Size

Lithium Ion

Battery Voltage (V)

20V

Bevel Capacity (degrees)

50 °

Blade Location

Left

Charger Included

Charger Not Included

Color Family

Yellow

Cordless Tool Type

Circular Saw

Cordless/Corded

Cordless

Included

Tool Only

Maximum Cut Depth at 45 Degrees (in.)

1.625 in

Maximum Cut Depth at 90 Degrees (in.)

2.125 in

Maximum Speed (RPM)

5150 RPM

Motor Type

Brushed

Number of Total Batteries Included

0

Power Tool Features

Keyless Blade Change, Spindle Lock

Product Weight (lb.)

8 lb

Returnable

90-Day

Saw Drive Type

Sidewinder

Tools Product Type

Power Tool

Warranty / Certifications

Manufacturer Warranty

3 year limited warranty/90 day money back guarantee/1 year free service contract

Questions & Answers

Can you cut a 2x4 on a 45° angle
ByAug 8, 2026
1 Answer | 
Answer This Question

Yes

By|Aug 14, 2026


    Is the saw brushless
    ByAug 1, 2026
    1 Answer | 
    Answer This Question

    No, this saw has a brushed motor.

    By|Aug 10, 2026


      Will this work with my DC720 and DC759 drills?
      ByJul 27, 2026
      1 Answer | 
      Answer This Question

      Yes, the DCA2203C is intended to let selected 20V MAX batteries work in most DEWALT 18V tools, For DC759, do not use premium batteries DCB200, DCB204, DCB204BT, or DCB205; use DCB201, DCB203, or DCB203BT instead.

      By|Jul 29, 2026


        What battery fits this saw
        ByJul 8, 2026
        1 Answer | 
        Answer This Question

        The DCS391B circular saw is compatible with all DEWALT 20V MAX lithium-ion batteries, including standard, XR, and FlexVolt (20/60V) batteries.

        By|Jul 8, 2026


          What is the maximum cutting depth
          ByJun 28, 2026
          1 Answer | 
          Answer This Question

          The DCS391B cut depth with a 6-1/2" blade is approximately 2-1/8" at 90-degrees.

          By|Jul 21, 2026

            (1)

            Is it brushless
            ByJun 24, 2026
            1 Answer | 
            Answer This Question

            The DCS391B is not brushless.

            By|Jun 25, 2026


              Can it cut a concrete groove?
              ByJun 24, 2026
              1 Answer | 
              Answer This Question

              No, the DEWALT DCS391B is designed for wood and similar materials, not concrete.

              By|Jun 24, 2026


                Is the dust bag included
                ByJun 18, 2026
                1 Answer | 
                Answer This Question

                No, it's not.

                By|Jun 18, 2026


                  Viewing 1-8 of 749

                  Customer Reviews

                  4.6 out of 5

                  • 4.6 out of 10,998 reviews
                  • 91% recommend this product
                  Filter by:
                  Showing 1-10 of 10,998 reviews
                  The combo tool set was a great deal during the Spring Black Friday sale. Always recommend DeWalt and I’ll buy their products whenever given the chance.
                  by
                  This set is not brushless, but I didn't see power difference compared to my other impact, which is brushless. I bought the kit when it was on discount, and as such it was totally worth it. It gets the job done.
                  by
                  Works like a charm. I love the dependability of Dewalt tools. This was a fantastic deal!
                  by
                  • Verified Purchase
                  1 found this review helpful
                  This customer chose to rate the product and not provide text.
                  by
                  THIS IS NOT A GOOD BRAND
                  I wasn’t used to using this brand,but I started using it because many other people were using it. I bought it at Home Depot and I regret it because that doesn’t last long, and the batteries become worn out very quickly.
                  by
                  Response from DewaltProductExpertFeb 18, 2026
                  Hello. Thank you for taking the time to provide your feedback. I'm sorry you weren't pleased with the DCK940D2. Your feedback is valuable as we take into consideration every piece of feedback that we come across. I will pass this along to our team for review. It is feedback like yours that allows us to make improvements.
                  Thanks, DEWALT Social Media Team
                    I’ve been using and abusing these for the last few weeks and they hold up line none other.
                    by
                    1 found this review helpful
                    I wish Dewalt had come out with this adaptor years ago. It is a great way to keep your old tools going.
                    by
                    1 found this review helpful
                    I bought this saw 6 months ago and i would recomend it because of the power it has and cuts ever thing that i try with out any problem and has been very reliable and is light for a saw and feel good in the hand and the e brake makes it safe so you dont have any risks and i am very happy with it and is now my every day saw that i bring with me
                    by
                      • Recommended
                      The features that stand out for the DeWalt 20v cordless circular saw, lightweight, easy to maneuver. The sidewinder feature gives better view point for more accurate cut. easily apply guide for ripping. Doesn’t bind as often due to good cutting power. I have had it a little over two months and would recommend.
                      by
                      2 found this review helpful
                      Great tool to have. It is light weight, well balanced and cuts through thick wood with great ease. What makes it especially easy is that the saw is cordless. No need to look for an outlet, just saw wherever you need it. This tool came without a battery, but you anyway want two batteries at least to make sure you always have a spare. There is nothing more annoying than having to wait for a battery to charge halfway through project. All and all I am happy with the purchase.
                      by
                      Showing 1-10 of 10,998 reviews

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                      Product Snapshot

                      Ideal for cutting through tough materials, ensuring precise and aggressive angled cuts with its 50° bevel capacity. This saw is a great choice for professionals who need reliable performance.
                      Ideal for pros who need a lightweight and powerful saw. This saw features a dust blower for clear cuts and a 3-year warranty for peace of mind.
                      Great for framers and builders looking for a compact and powerful saw, making cuts easier and more efficient.
                      Ideal for wood cutting, this saw delivers cordless convenience and power with a brushless motor and beveling capabilities.

                      Blade Size

                      6-1/2 in.
                      7-1/4 in
                      6-1/2 in
                      4-1/2 in.

                      Cordless

                      Cutting Capacity

                      Depth of cut at 45 degree : 1-5/8 in., Depth of cut at 90 degree : 2-1/8 in.
                      2.55 in at 90 degrees, 1.9 in. at 45 degrees
                      2-1/4 in. at 90°
                      Cut 2X material at 90° with a 4-1/2 in. blade

                      Motor Power

                      20V
                      15 A
                      18V
                      20V

                      Speed Control