DEWALT XTREME™ 12V MAX BRUSHLESS 5-3/8" CIRCULAR SAW (Tool Only) (DCS512B) Review

Summary

Compact 12V MAX* brushless circular saw sold as bare tool, aimed at tight-space and one-handed cutting rather than full-depth framing. Check whether you already own DEWALT 12V MAX* batteries, since none are included.

Strengths

Compact brushless 12V saw with electric brake, LED and rip guide included.
Brushless motor on a small battery platform suited to tight spaces.
Tool-free 0-50 deg bevel and 1-3/4 in. depth at 90 deg cover most trim cuts.
Included rip guide and optional dust chute add value for a bare tool.
3-year limited warranty with 1-year free service and 90-day satisfaction guarantee.

Weaknesses

Bare tool only; no battery or charger included.
5-3/8 in. blade size is not widely stocked; local stores may carry only 5-1/2 in.
Lower 3600 RPM and 1-3/4 in. cut depth limit heavy framing work.
No manufacturer-published weight or dimensions; third-party figures conflict.
Anecdotal owner reports of shoe misalignment and bevel tracking on some DEWALT saws.
A hands-on reviewer says it is not powerful enough to be the only circular saw.

Verified specifications

Model	DCS512B (also referenced as DCS512); kit variant DCS512J1 includes a 5.0Ah battery, charger and tool bag.
Platform	12V MAX* (maximum initial battery voltage 12 V, nominal 10.8 V); cordless; battery sold separately.
Motor	brushless.
Blade	5-3/8 in. (136 mm); arbor 3/8 in. (10 mm) per accessory blade pages.
No-load speed	3600 RPM (reported by an independent tool-news source; not stated on the accessible manufacturer page).
Depth of cut	1-3/4 in. (44 mm) at 90 deg; 1-1/4 in. (31 mm) at 45 deg.
Bevel capacity	0-50 deg, tool-free bevel lever.
Blade brake	electric brake stops blade when trigger is released.
LED worklight	on-board; turns off about 20 seconds after trigger release.
Dust collection	chute adaptable to DEWALT AirLock system or optional standard 35 mm dust extractor (sold separately).
Included (bare tool)	DCS512 saw, 5-3/8 in. saw blade (16T), blade change wrench, optional dust chute, rip guide.
Warranty	3-year limited warranty, 1-year free service, 90-day satisfaction guarantee.
Electronic protection system	protects battery pack against overloading, overheating or deep discharge; tool auto-shuts off and battery must be recharged.
Battery compatibility	works with all DEWALT 12V MAX* batteries (DCB120, DCB122, DCB124, DCB124G, DCB126, DCB126G, DCB127, DCB127G listed in the manual).

Full research notes and sources

Blades, speed and what it cuts

The saw runs a 5-3/8 in. blade at a reported 3600 RPM no-load speed, with 1-3/4 in. of cut depth at 90 deg and 1-1/4 in. at 45 deg. The lower speed and smaller blade make it better suited to compact and trim cuts, and one commenter suggested it suits metal cutting with an appropriate metal-cutting blade, though the guard is intended for woodcutting. The included blade is 16T; finer-tooth blades for paneling or vinyl and metal-cutting blades are separate accessories. blades, and a 5-1/2 in. blade only just cleared the guard.

Owner reports and limitations

Owner discussion is thin and anecdotal, so treat these as signals rather than defects. A commenter reported a recent DEWALT circular saw’s shoe over 1/8 in. out of parallel with the blade with no micro-adjustment. Another reported bevel-cut tracking problems on other DEWALT saws at steep bevels, attributed partly to thin blades and blade tilt. A Reddit thread reports a new power-tool user’s saw stopping and flashing while cutting 1x5 lumber. A Slickdeals commenter wrote that 12V is not 20V and that they sometimes need a high-amp 20V battery. These are individual reports, not verified model defects.

The manual calls for removing the battery before service, checking lower guard spring operation, keeping the guard clean, adjusting cutting depth to workpiece thickness and using correctly sized blades. Blow dirt and dust out of all air vents with clean, dry air at least once a week, wearing ANSI Z87.1 approved eye protection, and never use solvents on non-metallic parts. Warranty is 3 years limited with 1 year free service and a 90-day satisfaction guarantee. Launch pricing was $139 bare tool and $199 for the kit; 2026 Lowe’s sale prices for the bare tool ranged from $79 to $149, with multiple $94 and $99 postings and a $169 list price shown on a $99 deal.

Is it worth it?

At the 2021 launch price of $139 bare tool, the saw offered a compact brushless design with electric brake, LED, rafter hook and rip guide, but it is a 12V tool with limited cut depth and no battery included. A hands-on reviewer recommends against buying it as the only circular saw; it makes more sense as a second, compact saw for someone who values portability and low weight. No value conclusion beyond the observed 2026 Lowe’s sale range of $79-149 is supported.

Which model this is

This page covers the bare-tool DCS512B on DEWALT’s 12V MAX* platform. A kit variant, DCS512J1, uses the same saw with a 5.0Ah battery, charger and tool bag. Do not confuse it with DEWALT’s 20V MAX* or 60V MAX* circular saws, which use different battery platforms and blade sizes. The Amazon listing for the bare tool is ASIN B09CG9J148.