Head-to-head
DeWalt DCS570 vs DCS577 — 7-1/4" circ saw, 20V MAX vs FlexVolt
Both cut with a 7-1/4" blade. One is 20V MAX XR. One is FlexVolt 60V. Here's where the voltage bump earns its premium and where it doesn't.
DeWalt DCS570 (20V MAX XR)
20V MAX XR brushless 7-1/4" sidewinder circular saw. Cuts 2-9/16" at 90°, bevels to 57°. Sized for one-battery carry.
DeWalt DCS577 (FlexVolt 60V)
FlexVolt 60V MAX brushless 7-1/4" rear-handle saw (worm-drive style). Cuts 2-9/16" at 90°, bevels to 53°. Serious framing-cut power.
Where they differ
| Spec | DeWalt DCS570 | DeWalt DCS577 | Winner |
|---|---|---|---|
| Blade size | 7-1/4" | 7-1/4" | Tie |
| Handle style | Sidewinder | Rear-handle (worm-drive style) | Tie |
| No-load RPM | 5,800 | 5,800 | Tie |
| Cut capacity at 90° | 2-9/16" | 2-9/16" | Tie |
| Cut capacity at 45° | 1-7/8" | 1-7/8" | Tie |
| Battery platform | 20V MAX / XR / FlexVolt (at 20V) DCS570 is more pack-flexible | FlexVolt 60V (or 20V MAX at reduced power) | A wins |
| Cuts per charge on 5.0Ah | ~180 (2x4) | N/A — use FlexVolt | Tie |
| Cuts per charge on 9.0Ah FlexVolt | ~350 DCS570 draws less per cut | ~320 | A wins |
| Weight (bare) | 8.8 lbs | 10.6 lbs | A wins |
| Typical bare-tool price | ~$169 | ~$279 | A wins |
DCS570 for most framers. DCS577 if you want rear-handle feel and already run FlexVolt.
The DCS570 cuts just as deep, weighs 2 lbs less, costs ~$110 less, and runs on the same batteries you already own. Pick the DCS577 if you specifically want a worm-drive-style rear handle, are cutting wet lumber all day, or have a shop full of FlexVolt packs.
FAQ
Can the DCS577 run on a 20V MAX XR battery?+
Yes, but at reduced power. The saw is designed for 60V FlexVolt. A 20V pack works but you lose about 25% of cut speed and runtime.
Which one is closer to a corded worm-drive?+
DCS577. The rear-handle geometry and pack weight feel like a Skilsaw HD77. DCS570 feels like a Makita 5007MG sidewinder.