Craftsman V20 Brushless RP CMCS551 Circular Saw
Circular Saw
$129

Craftsman

Craftsman V20 Brushless RP CMCS551 Circular Saw

5(11 reviews across retail listings)

Craftsman's V20 flagship sidewinder pairs a Brushless RP motor — up to 75% more power than the brushed CMCS550 it supersedes — with a 2-9/16 in depth of cut that out-specs most 18V pro saws. In Pro Tool Reviews' testing it ripped two stacked sheets of 3/4-in OSB in 20.22 seconds, placing third against far pricier competition while coming in second-lightest, making it one of the strongest value plays in cordless circular saws.

Bare Tool
$129
Platform
Craftsman V20
Weight
8.7 lbs (with 6.0Ah battery; 7.26 lbs bare)
Best for: DIYers and prosumers already on Craftsman's V20 platform who want a genuine full-size 7-1/4 in saw without paying pro-brand prices

Specifications

Category
Circular Saw
Battery Platform
Craftsman V20
Voltage
20V
Motor
Brushless
Model
CMCS551B
Weight
8.7 lbs (with 6.0Ah battery; 7.26 lbs bare)
Released
2022
Blade
7-1/4 in
No-Load Speed
5,000 RPM
Max Cut Depth (90°)
2-9/16 in
Bevel
56° (stops at 22.5°/45°)

Features

Electric BrakeLED Light

Pros

  • Placed third in Pro Tool Reviews' stacked-OSB rip test (20.22 seconds through two full sheets of 3/4-in material), beating several saws that cost twice as much.
  • 2-9/16 in cut depth at 90° is deeper than most 18V/20V competitors and clears 2x material at a 45° bevel.
  • Second-lightest saw in Pro Tool Reviews' comparison at 8.74 lbs with a 6.0Ah battery — easy on the arm for sheet goods and overhead work.
  • Automatic electric blade brake stops the blade within 1-2 seconds of trigger release (confirmed in the official manual).
  • Excellent value: about $129 bare with frequent promos (Ace has run it at $99), backed by a 3-year limited warranty.
  • Tool-free depth and bevel adjustments, onboard magnetic hex-wrench storage, and reviewers praised the sightlines to the cut line.
  • 56° bevel capacity with positive stops at 22.5° and 45° covers rafter and stair layouts.
  • V20 is a huge, cheap battery ecosystem sold at every Lowe's and Ace, so spare packs are easy to find.

Cons

  • 5,000 RPM no-load speed trails the 6,000 RPM class leaders, so cuts in dense stock are a touch slower and rougher.
  • Overload protection halted Pro Tool Reviews' full-depth maximum-load cut after 14 inches — it needs a lighter feed rate when buried at full depth.
  • No rafter hook, a notable omission for anyone working off a ladder or framing.
  • No first-party kit with battery and charger — newcomers to V20 must piece the system together separately.
  • Owner feedback says performance depends heavily on battery size; small 2.0Ah packs noticeably starve it.
  • No dust port or collection option, so it's a broom-and-blower affair indoors.
  • V20 tops out at prosumer level — there are no high-output packs, so it can't grow into daily production framing use.
  • Pro Tool Reviews noted minor blade drag during compound miter cuts.

Common Questions

Do DeWalt 20V Max batteries fit Craftsman V20 tools?
No — despite both brands living under Stanley Black & Decker, V20 and 20V Max packs are physically incompatible and there's no official adapter. The consolation is that V20 is a huge, cheap ecosystem sold at every Lowe's and Ace, so spare packs are easy to find and inexpensive.
Is there a kit version with a battery and charger?
No — Craftsman sells the CMCS551 bare-tool only at about $129, so newcomers to V20 have to piece together a battery and charger separately. Budget for a 4Ah or larger pack while you're at it: owner feedback is clear that small 2.0Ah packs noticeably starve this saw.
How does it perform against pro-brand saws?
Better than the price suggests — it placed third in Pro Tool Reviews' stacked-OSB rip test at 20.22 seconds through two sheets of 3/4-in material, beating saws costing twice as much. The caveat: overload protection halted their full-depth maximum-load cut after 14 inches, so it wants a lighter feed rate when the blade is buried.
What's the cut capacity like for a 20V saw?
It's actually the standout spec: 2-9/16 in at 90 degrees is deeper than most 18V/20V competitors and clears 2x material even at a 45-degree bevel. The 56-degree bevel range with positive stops at 22.5 and 45 covers rafter and stair layouts too.
What are the practical downsides on the jobsite?
No rafter hook — a real omission for ladder work — no dust port of any kind, and a 5,000 RPM top speed that runs a touch slower and rougher in dense stock than the 6,000 RPM leaders. V20 also has no high-output battery tier, so the saw can't grow into daily production framing the way pro platforms can.

Compare the Craftsman V20 Brushless RP CMCS551 Circular Saw

Ryobi ONE+ HP PBLCS300 Circular Saw
$129
Circular Saw

Ryobi's brushless ONE+ HP sidewinder brought a full 7-1/4 in blade to the value platform. It shares blades with every pro saw and cuts standard framing lumber in one pass — the spec that separates it from compact 6-1/2 in budget saws.

Full 7-1/4 in bladeONE+ valueBrushless
Ryobi ONE+18V7.0 lbs (bare)Brushless
Best for: DIY builders who want a full-size blade and real 2x capacity on the budget platform
Full specs & owner notes
Ridgid 18V Brushless R8657 Circular Saw
$179
Circular Saw

Ridgid's flagship 18V sidewinder replaced the Octane version in 2022 with a brushless motor that Pro Tool Reviews found genuinely capable of replacing a 15-amp corded saw — 35% faster cutting than its predecessor at 5,400 RPM. It checks every feature box (electric brake, LED with dust blower, rafter hook, vacuum-ready shoe) and undercuts the big pro brands at $179 bare, with Ridgid's registered Lifetime Service Agreement sweetening the deal.

2-9/16 in cut depthLifetime Service Agreement$249 kit with 4.0Ah battery
Ridgid 18V18V8.8 lbs (bare tool)Brushless
Best for: Value-focused DIYers and remodelers who want near-pro performance plus Ridgid's registered lifetime service agreement covering batteries
Full specs & owner notes
Metabo HPT MultiVolt C3607DB "The Stud" Circular Saw
$199
Circular Saw

Third generation of Metabo HPT's MultiVolt sidewinder (superseding the award-winning C3607DA), "The Stud" spins at 6,000 RPM and adds a Torque Boost button that drops to 4,300 RPM while redirecting power into 40% more torque for LVL and dense engineered lumber. It was the fastest of twelve saws through double-stacked 3/4-in OSB in Pro Tool Reviews' 2026 shootout, and like all MultiVolt tools it can run corded via the ET36A AC adapter.

Fastest OSB rip in Pro Tool Reviews' 12-saw 2026 shootoutTorque Boost button trades RPM for 40% more torqueRuns on MultiVolt battery or plug-in AC adapter
Metabo HPT MultiVolt36V10.5 lbs (with battery; 7.9 lbs bare)Brushless
Best for: Framers who want corded-class speed plus a plug-in fallback — the hybrid battery/AC MultiVolt system is unique among 36V saws
Full specs & owner notes
Flex 24V FX2141 Circular Saw
$219
Circular Saw

Flex's 24V in-line sidewinder is one of the sleeper hits of the cordless saw world: 5,800 RPM, a 2-5/8 in depth of cut that clears 3x lumber in one pass, and Pro Tool Reviews' 9.5/10 'elite cutting performance' verdict. The balanced in-line design gives a clear view down both sides of the blade, and with a 10.0Ah Stacked Lithium pack Flex claims up to 610 cuts in 2x4 lumber. Magnesium footplate and guards keep it durable without the bulk.

5,800 RPMCuts 3x lumber in one passPro Tool Reviews 9.5/10
Flex 24V24V9.0 lbs (bare tool)Brushless
Best for: Pros and serious DIYers building on Flex's 24V platform who want top-tier sidewinder power with class-leading cut capacity
Full specs & owner notes
DeWalt FlexVolt DCS578 Circular Saw
$249
Circular Saw

DeWalt's FlexVolt 60V worm-style-power sidewinder, the saw that made corded 7-1/4 in saws optional for framing crews. FlexVolt batteries auto-switch between 20V and 60V, so packs bought for this saw also run every 20V Max tool.

FlexVolt 60VCorded-killing power2-9/16 in cut
DeWalt 20V Max60V8.2 lbs (bare)Brushless
Best for: Framers on the DeWalt platform who want a cordless saw with nothing left on the table
Full specs & owner notes
Bosch 18V ProFactor GKS18V-25GC Circular Saw
$249
Circular Saw

Bosch's flagship ProFactor sidewinder pairs a BiTurbo brushless motor with an onboard HMI offering six speed settings (2,500-5,000 RPM) and an Eco mode that stretches runtime up to 30%. Its party trick is a base that rides Bosch and select third-party guide rails with no adapter, and it keeps full 2x cut capacity across the entire 0-50° bevel range. One-touch depth adjustment, an electronic brake, and a 360° pivoting dust port round out a genuinely corded-class package.

Track-saw compatible base6-speed HMI with Eco modeCuts 2x at any bevel angle
Bosch 18V18V9.5 lbs (bare tool)Brushless
Best for: Bosch 18V users who want one saw that doubles as a track saw, with electronic speed control for finish-grade work
Full specs & owner notes