The DEWALT 20V MAX Circular Saw (DCS391B) consistently ranks as one of the top-selling (often #1 or #2) power circular saws on Amazon and major US retailers. This bare-tool cordless 6-1/2-inch sidewinder-style saw dominates best-seller lists due to its balance of power, portability, brand reliability, and compatibility with the massive DEWALT 20V battery ecosystem.
Key Specifications
- Blade Size: 6-1/2 inch (common for cordless; good balance of depth and maneuverability).
- Power: Brushless motor in many variants; delivers strong performance for framing, sheet goods, and general construction.
- Cutting Depth: ~2-1/8″ at 90°, ~1-5/8″ at 45° bevel.
- Weight: Around 7–8 lbs (tool only) — lightweight for all-day use.
- Features: Electric brake, LED light, depth and bevel adjustments, magnesium shoe on some models for durability and reduced weight.
- Battery: Uses popular DEWALT 20V MAX batteries (not included in bare tool version).
- Price: Bare tool often $100–$160; kits with battery/charger higher.
Pros
- Portability and Convenience: Cordless freedom is ideal for job sites without power access, renovations, or DIY projects. Quick setup compared to corded models.
- Power and Runtime: Handles 2x lumber, plywood, OSB, and light metal (with proper blade) effectively. Brushless motor provides good efficiency and longevity.
- Ergonomics: Comfortable grip, good balance, and features like the integrated dust blower or LED help with visibility and control.
- Durability: DEWALT’s tough build quality holds up well on professional and serious DIY sites. Easy blade changes.
- Ecosystem: If you already own DEWALT 20V tools, this integrates seamlessly—no new batteries needed.
- Value: Strong sales reflect its popularity as a go-to for contractors and homeowners.
Cons
- Depth of Cut: 6-1/2″ blade limits it compared to 7-1/4″ corded saws for thicker stock.
- Battery Dependency: Runtime depends on battery size (larger 5Ah+ recommended for heavy use). Not ideal for all-day high-volume cutting without spares.
- Noise and Vibration: Typical for cordless; ear protection advised.
- Bare Tool: Many buyers need to factor in battery cost if starting fresh.
- Bevel Accuracy: Some users note minor adjustments needed for precision work (common across many saws).
Performance in Real Use
In lab and field tests, the DCS391 series excels in crosscuts and general framing but may lag slightly behind premium competitors like Milwaukee M18 Fuel or Makita in raw power for dense hardwoods or continuous heavy ripping. It shines in mobility and everyday versatility. Users praise it for reliability on trim work, deck building, and remodeling.
Compared to Close Competitors:
- SKILSAW SPT77WML-01 (Worm Drive): Often a top seller in corded category—more torque for deep cuts but heavier and corded.
- Milwaukee M18 Fuel Models: Stronger in pro head-to-heads but usually pricier.
- Makita 5377MG: Excellent corded hypoid option favored for smoothness and magnesium build.
Who Should Buy It?
- Best for: DEWALT 20V owners, framers, remodelers, DIY enthusiasts, and job-site pros needing a lightweight, reliable cordless saw.
- Alternatives: Go corded (e.g., DEWALT or SKIL) for unlimited runtime and max power; consider Milwaukee for premium performance or budget options like SKIL PWRCore for lighter use.
Overall Rating: 4.5–4.7/5 across thousands of reviews. It’s a bestseller for good reason—proven, versatile, and backed by a strong warranty (typically 3 years). Always use proper blades, safety gear (glasses, dust mask, ear protection), and follow manufacturer guidelines.
