Dewalt 20v Circular Saw
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Dewalt 20v Circular Saw

Dewalt offers several 20V MAX circular saws that differ by blade size and intended use

Quick Answer

Dewalt offers several 20V MAX circular saws that differ by blade size and intended use. The three main options are:

  • Compact 4-1/2 in. (e.g., DCS571B) – ideal for tight spaces and light trim work.
  • Mid-size 6-1/2 in. (e.g., DCS391B, DCS565P1) – good for common framing and sheet goods.
  • Full-size 7-1/4 in. (e.g., DCS590B) – best for deep cuts in dimensional lumber.

Main Explanation

Blade Size and Cut Capacity

The blade size directly affects the maximum depth of cut and the saw's overall handling.

  • 4-1/2 in. blade (DCS571B) – listed on Dewalt’s official site as a 20V MAX ATOMIC brushless model. It is lightweight and designed for one-handed use in tight quarters, but its cut depth is limited to roughly 1-1/2 in. at 90°.
  • 6-1/2 in. blade – found on models like the DCS391B, which is described as a “Cordless Sidewinder Style” saw with 5,150 RPM and a 0–50° bevel capacity. A kit version (DCS565P1) includes a battery and charger. This size cuts up to about 2-1/4 in. at 90°, enough for most 2× lumber.
  • 7-1/4 in. blade (DCS590B) – the largest 20V MAX model, featuring a brushless motor that delivers up to 1,700 MWO and up to 368 cuts per charge. It can cut through 2× material at a full 45° bevel and handles stacked lumber.

Bevel Capability

Bevel capacity varies by model. The DCS391B offers a 0–50° bevel range. Some Dewalt circular saws (the exact model is not specified in the Lowes listing) provide a bevel capacity of up to 57° with detent stops at 45° and 22.5°. If you frequently cut steep bevels for roofing or fascia, check the bevel range of the specific model.

Power and Runtime

Brushless motors are standard on newer models. The DCS590B is listed as “brushless” and claims up to 1,700 MWO (maximum watt output) and up to 368 cuts per charge with a 20V MAX battery. The 4-1/2 in. ATOMIC saw also uses a brushless motor. Brushless motors generally provide longer runtime and more torque compared to brushed motors, but actual performance depends on the battery pack used.

Battery Platform

All Dewalt 20V MAX circular saws share the same battery system. The DCBP520 battery, for example, is compatible with all 20V MAX tools and chargers. You can use batteries from other Dewalt 20V tools (drills, pressure washers, etc.) with these saws.

Tradeoffs to Consider

  • Portability vs. Power: The 4-1/2 in. saw is extremely compact but can’t cut framing lumber. The 7-1/4 in. saw offers full cut capacity but is heavier and bulkier.
  • Kit vs. Tool Only: If you already own Dewalt 20V batteries, buying the tool-only version saves money. If you’re new to the platform, a kit (like DCS565P1) is a convenient starting point.
  • Bevel Range: Models with a wider bevel (up to 57°) give you more flexibility but may cost more.

Practical Takeaways

  1. Assess your most common cuts. For light trim and drywall, the 4-1/2 in. compact saw is sufficient. For framing and decking, choose a 6-1/2 in. or 7-1/4 in. model.
  2. Match the saw to your battery collection. If you already have Dewalt 20V batteries, buy the tool-only version. Otherwise, pick a kit that includes a battery and charger.
  3. Check bevel requirements. If you need more than 50° of bevel, verify the model’s spec. The DCS391B goes to 50°; other models may offer up to 57°.
  4. Review runtime claims. Based on manufacturer data, the DCS590B can deliver up to 368 cuts per charge. Real-world runtime varies with battery age and material hardness, so use these figures as relative benchmarks, not guaranteed performance.

    5. References

    1. Dewalt.com – Circular Saws (DCS571B) – https://www.dewalt.com/en-us/products/power-tools/saws/circular-saws
    2. CPO Outlets – Dewalt ATOMIC 20V MAX 4-1/2 in. saw – https://www.cpooutlets.com/dewaltcircular-saws
    3. Dewalt.com – DCS590B 7-1/4 in. saw specs – https://www.dewalt.com/en-us/product/dcs590b/20v-max-xr-brushless-cordless-7-14-circular-saw-tool-only
    4. Amazon.com – DEWALT DCS391B 6-1/2 in. saw – https://www.amazon.com/stores/DEWALT/page/B417BF7F-DF7F-41C2-8E32-677FC8A195B7
    5. Lowes.com – Dewalt Circular Saws (bevel info) – https://www.lowes.com/pl/power-tools/saws/circular-saws/dewalt/4294607774-4294926871
    6. Dewalt.com – DCS565P1 6-1/2 in. kit – https://www.dewalt.com/en-us/product/dcs565p1/20v-max-xr-6-12-brushless-cordless-circular-saw-kit

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